GMC 2003 C4C042 Owner'S Manual Download Page 305

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6-51

Tandem Axle Models

ITEM

NO.

ITEM

REMARKS

Brake Camshafts

One fitting each.

Propshaft U

Joint One fitting each joint.

Lubricate with
GM Part No. 1051344,
Wheel Bearing Lubricant.

Brake Shoe
Roller Pins

Apply engine oil at pin
to shoe joint only.

Rear Spring Pin

One fitting each side.

Rear Axles

Fill to level of filler plug.

Summary of Contents for 2003 C4C042

Page 1: ......

Page 2: ...l information and tips about the road and how to drive under different conditions 5 1 Problems on the Road This section tells you what to do if you have a problem while driving such as a flat tire or overheated engine etc 6 1 Service and Appearance Care Here the manual tells you how to keep your vehicle running properly and looking good 7 1 Maintenance Schedule This section tells you when to perfo...

Page 3: ... sold in Canada substitute the name General Motors of Canada Limited for GM Medium Duty Truck Division whenever it appears in this manual Please keep this manual in your vehicle so it will be there if you ever need it when you re on the road If you sell the vehicle please leave this manual in it so the new owner can use it We support voluntary technician certification Litho in U S A ECopyright Gen...

Page 4: ...nd a number of safety cautions in this book We use a box and the word CAUTION to tell you about things that could hurt you if you were to ignore the warning CAUTION These mean there is something that could hurt you or other people In the caution area we tell you what the hazard is Then we tell you what to do to help avoid or reduce the hazard Please read these cautions If you don t you or others c...

Page 5: ...nings in different colors or in different words You ll also see warning labels on your vehicle They use the same words CAUTION or NOTICE Vehicle Symbols Your vehicle may be equipped with components and labels that use symbols instead of text Symbols used on your vehicle are shown along with the text describing the operation or information relating to a specific component control message gage or in...

Page 6: ...v Here are some examples of symbols you may find on your vehicle ...

Page 7: ...064 C8V064 C4E042 C5E042 C6E042 C7E042 C8E042 C8E064 Since C Series models delivered from the factory are finished in a variety of ways by a number of companies you ll probably find other manuals in your finished vehicle These manuals are put there by the companies that have added components or equipment to the C Series model Read all these materials as well as this manual carefully to get all of ...

Page 8: ...e for Everyone 1 12 Here Are Questions Many People Ask About Safety Belts and the Answers 1 13 How to Wear Safety Belts Properly 1 13 Driver Position 1 21 Safety Belt Use During Pregnancy 1 22 Right Front Passenger Position 1 22 Air Bag System 1 36 Center Passenger Position 1 37 Rear Seat Passengers 1 41 Children 1 45 Restraint Systems for Children 1 64 Older Children 1 67 Safety Belt Extender 1 6...

Page 9: ...confuse you or make you push a pedal when you don t want to Adjust the driver s seat only when the vehicle is not moving Bucket Seats If Equipped If your vehicle has bucket seats also known as static seats you can adjust them forward or rearward with the lever located at the front of the seat To adjust the seat pull the lever up to release the seat bottom Slide the seat to where you want it and re...

Page 10: ...e are six ways you can adjust the seat If your vehicle has the high back air suspension seat there are five ways you can adjust the seat Height Adjustment The suspension seat height adjustment lever is located on the front inboard side of the seat To adjust the height of the air suspension seat pull the lever up to inflate Push the lever down to deflate The seat cushion itself can also be raised o...

Page 11: ...ll it forward You can choose between two settings Lumbar Adjustments The lumbar adjustment knob is located on the seatback on the inboard side of the driver s seat and on the outboard side of the passenger s seat To get more support in the lumbar area of your back turn the lumbar adjustment knob clockwise To decrease the amount of lumbar support turn the knob counterclockwise ...

Page 12: ... the seatback rearward turn the knob counterclockwise Turn the knob clockwise to tilt the seatback forward Fore and Aft Adjustment The fore and aft adjustment lever is located underneath the seat in the front To slide the seat forward or rearward move the lever toward the driver s door The seat will lock in at 1 2 inch 1 5 cm increments ...

Page 13: ...ting a dump truck application This feature is only available on low back seats Reclining Front Seatbacks If Equipped If your vehicle is equipped with bucket seats you can recline the seatbacks The lever is located on the outboard side of the seat cushion To recline the seatback lift the lever and use your body to move the seatback Release the lever to lock the seatback where you want it Lean forwa...

Page 14: ...s job because it won t be against your body Instead it will be in front of you In a crash you could go into it receiving neck or other injuries The lap belt can t do its job either In a crash the belt could go up over your abdomen The belt forces would be there not at your pelvic bones This could cause serious internal injuries For proper protection when the vehicle is in motion have the seatback ...

Page 15: ...d in place Safety Belts They re for Everyone This part of the manual tells you how to use safety belts properly It also tells you some things you should not do with safety belts And it explains the air bag system CAUTION Don t let anyone ride where he or she can t wear a safety belt properly If you are in a crash and you re not wearing a safety belt your injuries can be much worse You can hit thin...

Page 16: ...le up See Safety Belt Reminder Light in the Index In most states and all Canadian provinces the law says to wear safety belts Here s why They work You never know if you ll be in a crash If you do have a crash you don t know if it will be a bad one A few crashes are mild and some crashes can be so serious that even buckled up a person wouldn t survive But most crashes are in between In many of them...

Page 17: ... A Yes And they re for adult truckers and anyone else who rides in your vehicle Here s why when your vehicle goes say 30 mph 50 km h so do you and your passengers If the vehicle hits something it stops right then But nothing stops the people They keep moving ...

Page 18: ...omething will stop them It could be the windshield Or it could be the instrument panel Now what if you and your passengers were to give that big vehicle a chance to deal with the force of the impact instead of you ...

Page 19: ...de down And your chance of being conscious during and after an accident so you can unbuckle and get out is much greater if you are belted Q If my vehicle has air bags why should I have to wear safety belts A Air bags are in many vehicles today and will be in most of them in the future But they are supplemental systems only so they work with safety belts not instead of them Every air bag system eve...

Page 20: ...r Safety Belts Properly Adults This part is only for people of adult size Be aware that there are special things to know about safety belts and children And there are different rules for smaller children and babies If a child will be riding in your vehicle see the part of this manual called Children Follow those rules for everyone s protection First you ll want to know which restraint systems your...

Page 21: ...back slightly to unlock it Then pull the belt across you more slowly 4 Push the latch plate into the buckle until it clicks Pull up on the latch plate to make sure it is secure If the belt isn t long enough see Safety Belt Extender at the end of this section Make sure the release button on the buckle is positioned so you would be able to unbuckle the safety belt quickly if you ever had to ...

Page 22: ... s a sudden stop or a crash or if you pull the belt very quickly out of the retractor Shoulder Belt Height Adjuster Before you begin to drive move the shoulder belt adjuster to the height that is right for you Adjust the height so that the shoulder portion of the belt is centered on your shoulder The belt should be away from your face and neck but not falling off your shoulder To move it down push...

Page 23: ...t is too loose It won t give nearly as much protection this way CAUTION You can be seriously hurt if your shoulder belt is too loose In a crash you would move forward too much which could increase injury The shoulder belt should fit against your body ...

Page 24: ...You can be seriously injured if your belt is buckled in the wrong place like this In a crash the belt would go up over your abdomen The belt forces would be there not at the pelvic bones This could cause serious internal injuries Always buckle your belt into the buckle nearest you ...

Page 25: ...y injured if your belt goes over an armrest like this The belt would be much too high In a crash you can slide under the belt The belt force would then be applied at the abdomen not at the pelvic bones and that could cause serious or fatal injuries Be sure the belt goes under the armrests ...

Page 26: ... be seriously injured if you wear the shoulder belt under your arm In a crash your body would move too far forward which would increase the chance of head and neck injury Also the belt would apply too much force to the ribs which aren t as strong as shoulder bones You could also severely injure internal organs like your liver or spleen ...

Page 27: ...isted across the body CAUTION You can be seriously injured by a twisted belt In a crash you wouldn t have the full width of the belt to spread impact forces If a belt is twisted make it straight so it can work properly or ask your dealer to fix it ...

Page 28: ...on it you can damage both the belt and your vehicle Safety Belt Use During Pregnancy Safety belts work for everyone including pregnant women Like all occupants they are more likely to be seriously injured if they don t wear safety belts A pregnant woman should wear a lap shoulder belt and the lap portion should be worn as low as possible below the rounding throughout the pregnancy ...

Page 29: ...earn how to wear the right front passenger s safety belt properly see Driver Position earlier in this section The right front passenger s safety belt works the same way as the driver s safety belt If your vehicle has a static seat in this position and if you ever pull the shoulder portion of the belt out all the way you will engage the child restraint locking feature If this happens just let the b...

Page 30: ...ent panel in front of the right front passenger s seat your vehicle has an air bag for the driver only If it says AIR BAG on the middle part of the steering wheel but there is no right front passenger seat your vehicle has an air bag for the driver only If it doesn t say AIR BAG on the middle part of the steering wheel your vehicle doesn t have air bags Frontal air bags are designed to help reduce...

Page 31: ...ate at all in rollover rear or low speed frontal crashes or in many side crashes And for some unrestrained occupants air bags may provide less protection in frontal crashes than more forceful air bags have provided in the past Everyone in your vehicle should wear a safety belt properly whether or not there s an air bag for that person CAUTION Air bags inflate with great force faster than the blink...

Page 32: ... safety belt system nor its air bag system is designed for them Young children and infants need the protection that a child restraint system can provide Always secure children properly in your vehicle To read how see the part of this manual called Children There is an air bag readiness light on the instrument panel which shows the air bag symbol The system checks the air bag electrical system for ...

Page 33: ... 26 How the Air Bag System Works Where are the air bags The driver s air bag is in the middle of the steering wheel The right front passenger s air bag is in the instrument panel on the passenger s side ...

Page 34: ...he impact speed is above the system s designed threshold level In any particular crash no one can say whether an air bag should have inflated simply because of the damage to a vehicle or because of what the repair costs were Inflation is determined by the angle of the impact and how quickly the vehicle slows down in frontal or near frontal impacts What makes an air bag inflate In an impact of suff...

Page 35: ... it quickly deflates so quickly that some people may not even realize the air bag inflated Some components of the air bag module the steering wheel hub for the driver s air bag or the instrument panel for the right front passenger s bag will be hot for a short time The parts of the bag that come into contact with you may be warm but not too hot to touch There will be some smoke and dust coming fro...

Page 36: ... equipped with a crash sensing and diagnostic module which records information about the air bag system The module records information about the readiness of the system when the system commands air bag inflation The module also records speed engine rpm brake and throttle data D Let only qualified technicians work on your air bag system Improper service can mean that your air bag system won t work ...

Page 37: ...ch Models with Right Front Passenger Air Bag If your vehicle has a right front passenger air bag it has a switch on the instrument panel that you can use to turn off the right front passenger s air bag United States Canada ...

Page 38: ...use no space is available in the rear seat s of my vehicle or D the child has a medical condition which according to the child s physician makes it necessary for the child to ride in the front seat so that the driver can constantly monitor the child s condition Medical Condition A passenger has a medical condition which according to his or her physician D causes the passenger air bag to pose a spe...

Page 39: ...1 32 United States Canada To turn off the right front passenger s air bag insert your ignition key into the switch push in and move the switch to the off position ...

Page 40: ...ess light ever comes on when you have turned off the air bag it means that something may be wrong with the air bag system The right front passenger s air bag could inflate even though the switch is off If this ever happens don t let anyone whom the national government has identified as a member of a passenger air bag risk group sit in the right front passenger s position for example don t secure a...

Page 41: ...nformation about servicing your vehicle and the air bag system To purchase a service manual see Service and Owner Publications in the Index CAUTION For up to 10 minutes after the ignition key is turned off and the battery is disconnected an air bag can still inflate during improper service You can be injured if you are close to an air bag when it inflates Avoid yellow wires wires wrapped with yell...

Page 42: ...the front of the vehicle that could keep the air bags from working properly A Yes If you add things that change your vehicle s frame bumper system front end sheet metal or height they may keep the air bag system from working properly Also the air bag system may not work properly if you relocate any of the air bag sensors If you have any questions about this you should contact Customer Assistance b...

Page 43: ...eone can sit in the center position If your vehicle is a Crew Cab model someone can also sit in the center rear position When you sit in a center seating position you have a lap safety belt which has no retractor To make the belt longer tilt the latch plate and pull it along the belt ...

Page 44: ...ed so you would be able to unbuckle the safety belt quickly if you ever had to Rear Seat Passengers It s very important for rear seat passengers to buckle up Accident statistics show that unbelted people in the rear seat are hurt more often in crashes than those who are wearing safety belts Rear passengers who aren t safety belted can be thrown out of the vehicle in a crash And they can strike oth...

Page 45: ... more slowly 2 Push the latch plate into the buckle until it clicks Pull up on the latch plate to make sure it is secure When the shoulder belt is pulled out all the way it will lock If it does let it go back all the way and start again If the belt is not long enough see Safety Belt Extender at the end of this section Make sure the release button on the buckle ispositionedso you would beable to un...

Page 46: ...uld go over the shoulder and across the chest These parts of the body are best able to take belt restraining forces The safety belt locks if there s a sudden stop or a crash or if you pull the belt very quickly out of the retractor Each position next to the windows has a shoulder belt height adjuster Move the shoulder belt adjuster to the height that is right for you Adjust the height so that the ...

Page 47: ...ing up on the shoulder belt guide After you move the adjuster to where you want it try to move it down without pushing in to make sure it has locked into position CAUTION You can be seriously hurt if your shoulder belt is too loose In a crash you would move forward too much which could increase injury The shoulder belt should fit against your body ...

Page 48: ...need for everyone to use safety restraints In fact the law in every state in the United States and in every Canadian province says children up to some age must be restrained while in a vehicle Infants and Young Children Every time infants and young children ride in vehicles they should have the protection provided by the appropriate restraint Young children should not use the vehicle s safety belt...

Page 49: ...aby doesn t weigh much until a crash During a crash a baby will become so heavy it is not possible to hold it For example in a crash at only 25 mph 40 km h a 12 lb 5 5 kg baby will suddenly become a 240 lb 110 kg force on a person s arms A baby should be secured in an appropriate restraint ...

Page 50: ...or killed Air bags plus lap shoulder belts offer outstanding protection for adults and older children but not for young children and infants Neither the vehicle s safety belt system nor its air bag system is designed for them Young children and infants need the protection that a child restraint system can provide ...

Page 51: ...traint will have a label saying that it meets federal motor vehicle safety standards The restraint manufacturer s instructions that come with the restraint state the weight and height limitations for a particular child restraint In addition there are many kinds of restraints available for children with special needs CAUTION Newborn infants need complete support including support for the head and n...

Page 52: ...ld be secured in appropriate child restraints We know securing a child can present real problems in a medium duty vehicle like yours If your vehicle is a regular cab model with an air suspension seat in the right front passenger s position there is no place in your vehicle to secure a child restraint The only answer is to have smaller children make the trip in another vehicle where they can get th...

Page 53: ...back of the infant The harness system holds the infant in place and in a crash acts to keep the infant positioned in the restraint A forward facing child seat C E provides restraint for the child s body with the harness and also sometimes with surfaces such as T shaped or shelf like shields ...

Page 54: ... child restraints have used the adult belt system in the vehicle To help reduce the chance of injury the child also has to be secured within the restraint The vehicle s belt system secures the add on child restraint in the vehicle and the add on child restraint s harness system holds the child in place within the restraint One system the three point harness has straps that come down over each of t...

Page 55: ...r vehicle is a regular cab model with an air suspension seat in the right front passenger s position there is no place in your vehicle to secure a child restraint The only answer is to have smaller children make the trip in another vehicle where they can get the protection they need CAUTION A child restraint cannot be secured properly in an air suspension type seat This is because an air suspensio...

Page 56: ...nfant seat a child riding in a forward facing child seat and an older child riding in a booster seat If your vehicle has air bags and you want to secure a rear facing child restraint in the right front passenger s seat turn off the passenger s air bag See Air Bag Off Switch and Securing a Child Restraint in the Right Front Seat Position in the Index for more on this including important safety info...

Page 57: ...ople in the vehicle even when no child is in it Top Strap Some child restraints have a top strap or top tether It can help restrain the child restraint during a collision For it to work a top strap must be properly anchored to the vehicle Some top strap equipped child restraints are designed for use with or without the top strap being anchored Others require the top strap always to be anchored Be ...

Page 58: ...ng position where the child restraint will be placed CAUTION Each top tether bracket is designed to anchor only one child restraint Attaching more than one child restraint to a single bracket could cause the anchor to come loose or even break during a crash A child or others could be injured if this happens To help prevent injury to people and damage to your vehicle attach only one child restraint...

Page 59: ...to come loose or even break during a crash A child or others could be injured if this happens To help prevent injury to people and damage to your vehicle attach only one child restraint per bracket Anchor the top strap to this bracket For the left outboard seating position use anchor point A For the right outboard seating position use anchor point B For a center seating position use either anchor ...

Page 60: ...ctions that came with the child restraint Secure the child in the child restraint when and as the instructions say 1 Put the restraint on the seat 2 Pick up the latch plate and run the lap and shoulder portions of the vehicle s safety belt through or around the restraint The child restraint instructions will show you how If the shoulder belt goes in front of the child s face or neck put it behind ...

Page 61: ... the belt Make sure the release button is positioned so you would be able to unbuckle the safety belt quickly if you ever had to 4 Pull the rest of the shoulder belt all the way out of the retractor to set the lock ...

Page 62: ...find it helpful to use your knee to push down on the child restraint as you tighten the belt 6 Push and pull the child restraint in different directions to be sure it is secure To remove the child restraint just unbuckle the vehicle s safety belt and let it go back all the way The safety belt will move freely again and be ready to work for an adult or larger child passenger ...

Page 63: ...int interferes with shifting gears CAUTION A child in a child restraint in the center front seat can be badly injured or killed by the right front passenger air bag if it inflates If your vehicle has air bags never secure a child restraint in the center front seat It s always better to secure a child restraint in the rear seat if your vehicle has one You may secure a forward facing child restraint...

Page 64: ...he belt 2 Put the restraint on the seat 3 Run the vehicle s safety belt through or around the restraint The child restraint instructions will show you how 4 Buckle the belt Make sure the release button is positioned so you would be able to unbuckle the safety belt quickly if you ever had to ...

Page 65: ...or larger child passenger Securing a Child Restraint in the Right Front Seat Position Although a rear seat is a safer place you can secure a forward facing child restraint in the right front seat if it is not an air suspension seat Do not use a child restraint with an air suspension seat If your vehicle has a right front passenger air bag there s a switch on the instrument panel that you can use t...

Page 66: ...1 59 United States Canada ...

Page 67: ...s far back as it will go CAUTION If the air bag readiness light ever comes on when you have turned off the air bag it means that something may be wrong with the air bag system The right front passenger s air bag could inflate even though the switch is off If this ever happens don t let anyone whom the national government has identified as a member of a passenger air bag risk group sit in the right...

Page 68: ...dex If your vehicle has a right front passenger s air bag and your child restraint is forward facing always move the seat as far back as it will go before securing it in this seat See Seats in the Index 2 Put the restraint on the seat 3 Pick up the latch plate and run the lap and shoulder portions of the vehicle s safety belt through or around the restraint The child restraint instructions will sh...

Page 69: ... the shoulder belt back into the retractor while you push down on the child restraint If you re using a forward facing child restraint you may find it helpful to use your knee to push down on the child restraint as you tighten the belt 7 Push and pull the child restraint in different directions to be sure it is secure ...

Page 70: ...m the vehicle unless the person who will be sitting there is a member of a passenger air bag risk group See Air Bag Off Switch in the Index CAUTION If the right front passenger s air bag is turned off for a person who isn t in a risk group identified by the national government that person won t have the extra protection of an air bag In a crash the air bag wouldn t be able to inflate and help prot...

Page 71: ...r belt and get the additional restraint a shoulder belt can provide The shoulder belt should not cross the face or neck The lap belt should fit snugly below the hips just touching the top of the thighs It should never be worn over the abdomen which could cause severe or even fatal internal injuries in a crash Accident statistics show that children are safer if they are restrained in the rear seat ...

Page 72: ...er belt but the child is so small that the shoulder belt is very close to the child s face or neck A Move the child toward the center of the vehicle but be sure that the shoulder belt still is on the child s shoulder so that in a crash the child s upper body would have the restraint that belts provide If the child is so small that the shoulder belt is still very close to the child s face or neck y...

Page 73: ...t in this way in a crash the child might slide under the belt The belt s force would then be applied right on the child s abdomen That could cause serious or fatal injuries Wherever the child sits the lap portion of the belt should be worn low and snug on the hips just touching the child s thighs This applies belt force to the child s pelvic bones in a crash ...

Page 74: ...To wear it just attach it to the regular safety belt Checking Your Restraint Systems Now and then make sure the safety belt reminder light and all your belts buckles latch plates retractors and anchorages are working properly Look for any other loose or damaged safety belt system parts If you see anything that might keep a safety belt system from doing its job have it repaired Torn or frayed safet...

Page 75: ... possible If you ve had a crash do you need new belts After a very minor collision nothing may be necessary But if the belts were stretched as they would be if worn during a more severe crash then you need new parts If belts are cut or damaged replace them Collision damage also may mean you will need to have safety belt or seat parts repaired or replaced New parts and repairs may be necessary even...

Page 76: ...quipped 2 30 Diesel Engine Exhaust Brake If Equipped 2 31 Two Speed Rear Axle Electric Shift Control If Equipped 2 34 Automatic Transmission Operation 2 36 Manual Transmission Operation 2 40 Parking 2 45 Parking Over Things That Burn 2 45 Engine Exhaust 2 46 Running Your Engine While You re Parked Automatic Transmission 2 47 Horn 2 48 Tilt Wheel If Equipped 2 48 Turn Signal Multifunction Lever 2 5...

Page 77: ...icle with the windows closed is dangerous A child can be overcome by the extreme heat and can suffer permanent injuries or even death from heat stroke Never leave a child alone in a vehicle especially with the windows closed in warm or hot weather ...

Page 78: ...r the passenger s window If your vehicle is a Crew Cab model with power windows there will be switches located on the rear doors as well However the driver s door will have four switches located on it that can control all windows Your power windows will work when the ignition has been turned to ACCESSORY or RUN Press the rear of the switch with the power window symbol on it to lower the window and...

Page 79: ...indows the driver s door will have a lockout feature When engaged this feature will prevent all window switches except the driver s window switches from operating This switch is located above the four window switches on the driver s door When the switch is not engaged all windows will return to normal operation Sliding Rear Window If Equipped To open the sliding rear window unlock the latch lever ...

Page 80: ...cle with the ignition key is dangerous for many reasons A child or others could be badly injured or even killed They could operate the power windows or other controls or even make the vehicle move Don t leave the keys in a vehicle with children ...

Page 81: ...NOTICE Your vehicle has a number of new features that can help prevent theft But you can have a lot of trouble getting into your vehicle if you ever lock your keys inside You may even have to damage your vehicle to get in So be sure you have extra keys If you ever do get locked out of your vehicle call GM Roadside Assistance Center See Roadside Assistance in the Index ...

Page 82: ...t and can suffer permanent injuries or even death from heat stroke Always lock your vehicle whenever you leave it D Outsiders can easily enter through an unlocked door when you slow down or stop your vehicle Locking your doors can help prevent this from happening There are several ways to lock and unlock your vehicle If your vehicle is equipped with keyless entry you can use your transmitter to lo...

Page 83: ...th your vehicle Your keyless entry system operates on a radio frequency subject to Federal Communications Commission FCC Rules and with Industry Canada This device complies with Part 15 of the FCC Rules Operation is subject to the following two conditions 1 this device may not cause harmful interference and 2 this device must accept any interference received including interference that may cause u...

Page 84: ...ather D Check the location Other vehicles or objects may be blocking the signal Take a few steps to the left or right hold the transmitter higher and try again D Check to determine if battery replacement is necessary See the instructions that follow D If you re still having trouble see your dealer or a qualified technician for service Operation To unlock the driver s door press the UNLOCK button o...

Page 85: ...r vehicle Each vehicle can have a maximum of four transmitters matched to it Battery Replacement Under normal use the battery in your remote keyless entry transmitter should last about two years You can tell the battery is weak if the transmitter won t work at the normal range in any location If you have to get close to your vehicle before the transmitter works it s probably time to change the bat...

Page 86: ...e necessary due to the security method used by this system The transmitter does not send the same signal twice to the receiver The receiver will not respond to a signal it has been sent previously This prevents anyone from recording and playing back the signal from the transmitter To resynchronize your transmitter stand close to your vehicle and simultaneously press and hold the LOCK and UNLOCK bu...

Page 87: ...trol heated mirrors power take off rear air suspension two speed axle electric exhaust brake two speed axle air differential lock rear axle differential lock and inter axle differential lock If your vehicle does not have some of the features controlled by these switches there will be a blank switch marker in its place For more information see each of these features in the Index ...

Page 88: ...t nothing we put on it can make it impossible to steal However there are ways you can help Key in the Ignition If you leave your vehicle with the keys inside it s an easy target for joy riders or professional thieves so don t do it Remember to remove your key and take it with you Always do this When you take your key with you your ignition will be locked Also remember to lock the doors ...

Page 89: ...ed D Avoid making hard stops for the first 200 miles 322 km or so During this time your new brake linings aren t yet broken in Hard stops with new linings can mean premature wear and earlier replacement Follow this breaking in guideline every time you get new brake linings D Use the lowest gear you can when you start a loaded vehicle in motion and when going up hills to avoid overloading the engin...

Page 90: ...s it was before you inserted the key B LOCK This position locks your ignition steering wheel and transmission It s a theft deterrent feature You will only be able to remove your key when the ignition is turned to LOCK C OFF This position lets you turn off the engine but still turn the steering wheel It doesn t lock the steering wheel like LOCK Use OFF if you must have your vehicle in motion while ...

Page 91: ...atic Transmission Set the parking brake and move your shift lever to NEUTRAL N or PARK P if so equipped Your engine won t start in any other position that s a safety feature Manual Transmission Set the parking brake shift to neutral and hold the clutch pedal to the floor while starting the engine Starter Motor Operation D The starter motor will disengage if you release the key or the engine reache...

Page 92: ... flooded with too much gasoline Wait 15 seconds to let the starter motor cool down Do Steps 1 through 3 again When the engine starts let go of the key and the accelerator pedal NOTICE Your engine is designed to work with the electronics in your vehicle If you add electrical parts or accessories you could change the way the engine operates Before adding electrical equipment check with your dealer I...

Page 93: ...ssion is in a drive gear Stopping the Gasoline Engine Let your engine idle for a few seconds before turning it off after you have finished driving your vehicle If you shift to NEUTRAL N or PARK P set the parking brake If your vehicle has a two speed axle put the range selector in LOW To be sure the axle has shifted into LOW engage the clutch and transmission the vehicle may move slightly when you ...

Page 94: ...he part of this manual that tells how to do it without damaging your vehicle See Towing Your Vehicle in the Index Restarting the Diesel Engine While Moving Automatic Transmission If you have to restart the engine while the vehicle is moving you ll first have to shift the automatic transmission to NEUTRAL N This safety feature prevents starting the engine when the transmission is in a drive gear St...

Page 95: ... starting fluid or you could damage your engine If you have the GM system use only GM approved starting fluid that has been tested to establish compatibility with the air inlet heater system Diesel Engine Warm Up Several factors affect how quickly your diesel engine warms up These can include outside temperature engine load idle time and your vehicle s option content Your vehicle may be equipped w...

Page 96: ...lem is known and the problem is fixed If the engine shuts down when you are still in traffic you can restart the engine and get another 25 30 seconds of operation Do this only if you have to since there is a problem that can harm the engine if it isn t fixed Engine automatic shutdown for gasoline engines requires activation by your dealer High Idle System CaterpillarR Diesel and Gasoline Engines Y...

Page 97: ... P The manual high idle feature is activated by pressing the switch on the instrument panel When the switch is pressed again or any of the previous conditions are not met manual high idle will be deactivated The manual high idle has been preset at the factory Your dealer may change the setting to fit your needs For vehicles with Caterpillar diesel engines manual high idle can be used to set any de...

Page 98: ...On vehicles equipped with a diesel engine exhaust brake the exhaust brake switch must be on The indicator in the exhaust brake switch will be lit when the exhaust restrictor is active The exhaust brake indicator light in the center of the instrument panel will also be lit whenever the exhaust restrictor is active When the engine coolant temperature is below 149_F 65_C and the outside temperature i...

Page 99: ...ssion Move your shift lever to neutral and hold the clutch pedal to the floor while starting the engine Your vehicle won t start if the clutch pedal is not all the way down that s a safety feature Starting Your Engine 1 Turn your ignition key to RUN Observe the wait to start light See Wait To Start Light in the Index This light may not come on if the engine is hot 2 As soon as the wait to start li...

Page 100: ...E If you re not in an idling vehicle and the engine overheats you wouldn t be there to see the overheated engine condition This could damage your vehicle Don t let your engine run when you re not in your vehicle Cold Weather Starting Diesel Engine The following tips will help you get good starting in cold weather Use the recommended engine oil when the outside temperature drops below freezing See ...

Page 101: ...gine still won t start your vehicle needs service If the light does not come on when the engine is cold your vehicle needs service If your batteries don t have enough charge to start your engine see Battery in the owner s manual Be sure you have the right oil for your engine and that you ve changed the oil at the proper times If you use the wrong oil your engine may be harder to start Be sure you ...

Page 102: ...f starting stop the engine and find the cause D If the engine coolant temperature gage needle goes into the hot area on the gage stop the engine and find the cause of the overheating D If you have air brakes the dual needle air pressure gage should read at least 115 psi 790 kPa for both service systems before you try to move the vehicle When air pressure is below 60 psi 420 kPa the LOW AIR light w...

Page 103: ...g temperatures which can affect engine operation and reduce engine life Engine idle speed should be increased to 1200 rpm whenever extended idle is required Once started the engine should be placed under load to allow the engine coolant temperature to reach 150_F 66_C before shutting off the engine Engine Coolant Heater If Equipped If your vehicle is equipped with this feature the plug in receptac...

Page 104: ...ly grounded three prong 110 volt AC outlet Use a heavy duty three prong extension cord rated for at least 15 amps 4 Before starting the engine be sure to unplug the cord How long should you keep the coolant heater plugged in The answer depends on the outside temperature From 32_F to 10_F 0_C to 23_C keep the coolant heater plugged in at least two hours Below 10_F 23_C keep the coolant heater plugg...

Page 105: ... the symbol on the switch that will come on when the exhaust brake is active See Exhaust Brake Indicator Light in the Index for more information When using the exhaust brake the proper gear range selection is important The exhaust brake will be most effective if the gear range selected is the lowest possible range that does not allow the engine rpm to go more than 200 rpm above rated full load rpm...

Page 106: ... to lock when using the exhaust brake on slippery surfaces switch the exhaust brake off immediately The exhaust brake will turn off if the anti lock brake system is activated Two Speed Rear Axle Electric Shift Control If Equipped If your vehicle is equipped with this feature you ll find a label on the headliner above the windshield or in another place near the driver that shows how to use it Be su...

Page 107: ... down from high to low do the following 1 Move the switch down to low 2 release the accelerator and then quickly apply it again Automatic Transmission The rear axle shift control switch for an automatic transmission is located in the instrument panel switchbank Press the bottom of the switch to get to the low range The switch indicator light will come on when the vehicle is in low range Press the ...

Page 108: ...ehicle You ll need to engage the transmission even moving the vehicle a little to be sure the axle is in low range Then shift into PARK P apply the parking brake and shut off the engine Also always start the vehicle in motion with the two speed axle in the low position To shift up from low to high press the top of the rear axle shift control switch and press down on the accelerator When you shift ...

Page 109: ...smission Operation We build vehicles with five and six speed automatic transmissions This part of the manual covers the basics of these With some of the transmissions you will find another manual in your vehicle that goes into more detail On the headliner in front of and above the driver or in some other place near the driver you will see a label that describes important operating facts about the ...

Page 110: ...e suddenly You or others could be injured To be sure your vehicle won t move even when you re on fairly level ground always set your parking brake and move the shift lever to PARK P if equipped CAUTION Shifting into a drive gear while your engine is racing running at high speed is dangerous Unless your foot is firmly on the brake pedal your vehicle could move very rapidly You could lose control an...

Page 111: ... s important to begin with the engine speed at idle Then start to engage the clutch and listen for an engine speed drop of about 100 rpm At this point the clutch is engaging so you should increase the engine speed and fully engage the clutch It s important not to increase the engine speed sooner or before the clutch begins it s engagement If you do you can cause damage to your vehicle Double Clutc...

Page 112: ...ft into the next lower gear before your engine begins to lug When you shift down be sure to double clutch if required ZF Six Speed Transmission Here s how to operate your transmission This six speed pattern is unique to GM manual transmissions The transmission always repositions the shift lever to neutral which is located between FOURTH 4 and FIFTH 5 gear To prevent unintentional gear selections a...

Page 113: ...ft into SECOND 2 from FIRST 1 while applying light pressure to the right on the shifter Then slowly let up on the clutch pedal as you press the accelerator pedal If you come to a complete stop and the shift lever will not go into SECOND 2 put the lever in neutral and let up on the clutch pedal to fully engage the clutch Press the clutch pedal again Then shift into SECOND 2 THIRD 3 Press the clutch...

Page 114: ... moving in REVERSE R Clutch Brake Vehicles with Non Synchronized Transmission A clutch brake is used to stop transmission input shaft rotation so that FIRST 1 or REVERSE R gear selection can be initiated when the vehicle is at a standstill and the engine is idling Press the clutch pedal all the way down to the floorboard to apply the clutch brake When using the clutch brake disengage the clutch pe...

Page 115: ...ittle 2 Hold the regular brake pedal down with your right foot 3 Apply the parking brake 4 Shift the transmission to NEUTRAL or PARK P Hydraulic Brakes If Equipped If your vehicle has hydraulic brakes it has either a parking brake foot pedal or hand lever If you have the parking brake foot pedal it is located below the instrument panel to the left of the steering column If you have the parking bra...

Page 116: ... is released the brake system warning light will go off NOTICE Driving with the parking brake on can cause your rear brakes to overheat You may have to replace them and you could also damage other parts of your vehicle Always check to be sure your parking brake is fully released before you drive Propshaft Park Brake Burnish Procedure It is recommended that the propshaft mounted parking brake be bu...

Page 117: ...strike someone or something When both of these knobs are pushed in hold the regular brake pedal down to keep your rig from moving If your vehicle has air brakes you will have this parking brake It is located above the radio in the instrument panel Pulling it out applies the parking brake The park brake light will come on when the air parking brake is applied ...

Page 118: ...4 Get into the tractor 5 Push and hold down the regular brake pedal 6 Push in both the yellow parking brake and the red trailer air supply knobs This will charge your trailer s air system After a few minutes the trailer system should be fully charged When it is the air pressure gage will show about 125 to 135 psi 862 to 931 kPa For driving with a trailer the yellow and red if equipped knobs must b...

Page 119: ...iler air supply knob will automatically pop out and apply the spring brakes on the trailer If the air pressure drops to 35 to 45 psi 241 to 310 kPa the yellow park brake knob will automatically pop out and apply the spring brakes on the truck or tractor If you ever have a complete loss of air so that your air brakes automatically apply there is a way that the tow operator can release the parking b...

Page 120: ...sciousness and death You might have exhaust coming in if D Your exhaust system sounds strange or different D Your vehicle gets rusty underneath D Your vehicle was damaged in a collision D Your vehicle was damaged when driving over high points on the road or over road debris D Repairs weren t done correctly D Your vehicle or exhaust system had been modified improperly If you ever suspect exhaust is...

Page 121: ...ng One place this can happen is a garage Exhaust with CO can come in easily NEVER park in a garage with the engine running Another closed in place can be a blizzard See Blizzard in the Index CAUTION It can be dangerous to get out of your vehicle if the shift lever is not fully in PARK P with the parking brake firmly set Your vehicle can roll Don t leave your vehicle when the engine is running unle...

Page 122: ...ing brake Follow the proper steps to be sure your vehicle won t move Horn Sound the horn by pushing the center of the steering wheel If you have the optional air horn it is controlled by a cord that you ll find up above and to the left of the driver The harder you pull on the cord the louder the air horn will sound The air horn works only after your air brake system pressure gets up to about 115 p...

Page 123: ...g wheel is located on the left side of the steering column To tilt the wheel hold the wheel and pull the lever Then move the wheel to a comfortable position and release the lever to lock the wheel in place Turn Signal Multifunction Lever The lever located on the left side of the steering column includes the following D Turn and Lane Change Signals D Headlamp High Low Beam Changer D Windshield Wipe...

Page 124: ...our lane change The lever will return by itself when you release it As you signal a turn or a lane change if the arrows don t flash but just stay on check the turn signal flasher and circuit breaker See Fuses and Circuit Breakers in the Index If a bulb is burned out replace it to help avoid an accident If the arrows don t go on at all when you signal a turn check the circuit breaker and for burned...

Page 125: ...ow speed turn the band toward you to the first solid band below the delay settings High Speed For high speed wiping turn the band further to the second solid band below the delay settings To stop the wipers move the band to off Be sure to clear ice and snow from the wiper blades before using them If they are frozen to the windshield carefully loosen or thaw them If your blades do become worn or da...

Page 126: ...washer until the windshield is warmed Otherwise the washer fluid can form ice on the windshield blocking your vision Cruise Control Option If your vehicle has this feature it is located at the end of your multifunction lever Set Pressing in this button at the end of the lever sets the cruise control speed Off Moving the switch to this position turns off the cruise control On Moving the switch to t...

Page 127: ...winding roads or in heavy traffic D Cruise control can be dangerous on slippery roads On such roads fast changes in tire traction can cause needless wheel spinning and you could lose control Don t use cruise control on slippery roads Setting Cruise Control CAUTION If you leave your cruise control switch on when you re not using cruise you might hit a button and go into cruise when you don t want t...

Page 128: ...e switch or apply the brake So unless you want to go faster don t hold the switch at resume accelerate Increasing Speed While Using Cruise Control There are two ways to go to a higher speed D Use the accelerator pedal to get to the higher speed Press the button at the end of the lever then release the button and the accelerator pedal You ll now cruise at the higher speed D Move the cruise switch f...

Page 129: ...eed load and the steepness of the hills When going up steep hills you may want to step on the accelerator pedal to maintain your speed When going downhill you may have to brake or shift to a lower gear to keep your speed down Of course applying the brake or clutch takes you out of cruise control Many drivers find this to be too much trouble and don t use cruise control on steep hills Ending Cruise...

Page 130: ...fferentials so that power is transmitted equally to both rear axles Let up on the accelerator before you turn on your inter axle differential lock When you turn on this control the diff lock indicator on the center of the instrument panel will light NOTICE Activating the inter axle differential lock when the rear wheels are actually spinning freely as they might on ice or snow can cause you to los...

Page 131: ...ven both wheels may start to slip you can press the bottom of this switch It locks your rear differential so that power is transmitted equally to both rear wheels Let up on the accelerator before you turn on your rear axle differential lock NOTICE Activating the rear axle differential lock when the rear wheels are actually spinning freely as they might on ice or snow can cause you to lose control ...

Page 132: ...ol valve upward to release the trailer brakes Use this control only when you re driving Don t use it for parking or to hold the rig on a hill CAUTION Using the trailer brake hand control for parking or for holding the vehicle on a hill may not keep the vehicle from rolling This can happen if someone hits the valve by accident or if air pressure bleeds from the system If the vehicle rolls you or ot...

Page 133: ...your headlamp wiring checked right away if this ever happens Headlamps On Reminder If Equipped If you have this system a tone will sound when your headlamps and or parking lamps are turned on and your ignition is in LOCK or ACCESSORY Daytime Running Lamps Daytime Running Lamps DRL can make it easier for others to see the front of your vehicle during the day DRL can be helpful in many different dri...

Page 134: ... the DRL off set the parking brake The DRL will stay off until you release the parking brake As with any vehicle you should turn on the regular headlamp system when you need it Marker Lamp Defeat Switch If your vehicle has this feature you can manually blink the marker and clearance lamps The marker lamp defeat switch is located in the instrument panel switchbank Press and hold the bottom of the s...

Page 135: ...mps will come on when you open a door You can also turn the dome lamps on by moving the thumbwheel located to the right of the exterior lamp control all the way up to the second position In this position the dome lamps will remain on whether a door is open or closed You can use the dome override button to set the dome lamps to automatically come on when a door is open or to remain off The dome ove...

Page 136: ... lamp to turn the lamp on or off Mirrors Inside Rearview Mirror If Equipped Pull the tab under the mirror toward you to reduce glare from headlamps behind you after dark Push the tab away from you to restore the mirror to the daytime position Outside Rearview Mirrors Adjust the outside rearview mirrors so you can see a little of the side of your vehicle and the area beside your vehicle from a comf...

Page 137: ...e outer arrows on the switch until the mirror is in the desired position Heated Outside Rearview Mirrors If Equipped If your vehicle has this feature your outside rearview mirrors can be defrosted The switch is for this feature is located in the instrument panel switchbank Press the bottom of the switch to turn the heated outside rearview mirrors on The switch indicator light will be come on and s...

Page 138: ...ge Compartments Your vehicle includes a number of storage compartments for storage of often used items Some vehicles have storage areas in the instrument panel Use these spaces for items such as gloves or small books Another small storage area may be located overhead This area can be used to store your sunglasses Some vehicles have a storage area behind the rear seat Other models may have more sto...

Page 139: ... s seat To expose the center console storage compartment pull the strap to release the seatback Then fold the seatback forward To open the center console storage compartment Press the release button and lift the lid rearward With the lid closed it can be used as a clipboard to hold papers in place Before returning the seatback to the upright position make sure the console is snapped shut Lift the ...

Page 140: ... element Just push the lighter all the way in and let it go When it s done it will pop back out by itself Sun Visors To block out glare you can swing down the visors You can also swing them out to block glare from the side Accessory Power Outlets With accessory power outlets you can plug in auxiliary electrical equipment such as a cellular telephone or CB radio The accessory power outlets are loca...

Page 141: ...ating When adding electrical equipment be sure to follow the proper installation instructions included with the equipment NOTICE Power outlets are designed for accessory plugs only Do not hang any type of accessory or accessory bracket from the plug Improper use of the power outlet can cause damage not covered by your warranty Trailer Connections C4 C5 Models Only If Equipped Heavy Duty Trailer Wi...

Page 142: ...connecting the trailer air line connections to another piece of equipment be sure to replace their protective caps Electrical Connections This system is a seven wire cable that will connect to the trailer supplying power to the trailer s lighting system When not in use it is stored in the trailer air hose storage bracket NOTICE Starting in 1998 the center pin also known as the auxiliary circuit of...

Page 143: ...2 68 The Instrument Panel Your Information System ...

Page 144: ...ake Control s If Equipped E Auxiliary Gages If Equipped F Exterior Lamp Control G Turn Signal Multifunction Lever H Hazard Warning Flashers Button I Auxiliary Switches If Equipped J Audio System or Storage Area K Auxiliary Warning Lights L Comfort Controls M Instrument Panel Switchbank N Air Bag Off Switch If Equipped P Accessory Power Outlets ...

Page 145: ...s designed to let you know at a glance how your vehicle is running You ll know how fast your going about how much fuel is left and many other things you ll need to drive safely and economically United States Diesel Engine shown Canada and Gasoline Engine similar ...

Page 146: ...eter The trip odometer can tell you how far your vehicle has been driven since you last set the trip odometer to zero While the engine is running press the reset button located to the right of the trip odometer to toggle between the trip odometer and the regular odometer Holding the reset button for two seconds while the engine is running and the trip odometer is displayed will reset it To display...

Page 147: ...d reduces engine power until vehicle speed gets down to maximum governed speed A 75 mph 120 km h road speed governor is standard for most models but can be programmed to any speed below that default setting Other models have a default setting of 80 to 85 mph 128 to 136 km h You may have a label on the headliner of your vehicle with more information on your engine road speed governor See your deale...

Page 148: ...ghts and gages can signal that something is wrong before it becomes serious enough to cause an expensive repair or replacement Paying attention to your warning lights and gages could also save you or others from injury Warning lights come on when there may be or is a problem with one of your vehicle s functions As you will see in the details on the next few pages some warning lights come on briefl...

Page 149: ...hat to do about it Please follow this manual s advice Waiting to do repairs can be costly and even dangerous So please get to know your warning lights and gages They re a big help Safety Belt Reminder Light When the key is turned to RUN or START a light will come on for several seconds to remind people to fasten their safety belts The safety belt light will also come on and stay on for several sec...

Page 150: ...eans the system is ready If the air bag readiness light stays on after you start the vehicle or comes on when you are driving your air bag system may not work properly Have your vehicle serviced right away CAUTION If the air bag readiness light stays on after you start your vehicle it means the air bag system may not be working properly The air bags in your vehicle may not inflate in a crash or th...

Page 151: ...s air bag off this light will come on and stay on to remind you that the air bag has been turned off This light will go off when you turn the air bag back on again See Air Bag Off Switch in the Index for more on this including important safety information United States Canada ...

Page 152: ...itch in the Index for more on this including important safety information CAUTION If the air bag readiness light ever comes on when you have turned off the air bag it means that something may be wrong with the air bag system The right front passenger s air bag could inflate even though the switch is off If this ever happens don t let anyone whom the national government has identified as a member o...

Page 153: ...k of back up braking if the engine quits or the power steering pump should fail Voltmeter When your engine is running the voltmeter gage at the right side of the instrument panel cluster shows the charging system voltage Readings in either warning zone indicate a possible problem in the electrical system Readings in the low warning zone may occur when a large number of electrical accessories are o...

Page 154: ... transmission senses a problem and chooses a gear to stay in so that you can drive the vehicle in that gear You may not be able to drive as fast or back up when this light is on NOTICE If the service transmission warning light comes on while you are driving it is a warning that making a transmission range change could leave you stranded The vehicle may not continue to move if you change gears with...

Page 155: ...Transmission Operator s Manual in your vehicle for further information Brake System Warning Light Your vehicle has either hydraulic or air brakes Each system has different warning lights Hydraulic Brake System Warning Lights Vehicles with hydraulic systems have two brake system warning lights on the instrument panel If the BRAKE warning light comes on it means that the fluid level in the master cy...

Page 156: ...blem Have your brake system inspected right away If one or both of these lights come on and stay on while you are driving pull off the road and stop carefully You may notice that the pedal is harder to push Or the pedal may go closer to the floor It may take longer to stop If the BRAKE light is still on have the vehicle towed for service See Towing Your Vehicle in the Index See Hydraulic Brake Sys...

Page 157: ...one come on while you are driving you should drive only as far as the nearest point of safety and then stop the vehicle Here s a very important thing for you to know CAUTION If the LOW AIR warning light comes on and the warning tone sounds the vehicle can stop suddenly and without further warning This is because the parking brake will come on if the pressure falls below 35 to 45 psi 240 to 310 kPa...

Page 158: ...ake system this light will come on when you start your engine and it may stay on for several seconds That s normal If the light stays on or comes on when you re driving your vehicle needs service If the BRAKE or LOW AIR warning light isn t on you still have brakes but you don t have the anti lock brake feature If the BRAKE and or LOW AIR warning light is on you don t have anti lock brakes and ther...

Page 159: ...diately If an anti lock brake system equipped trailer is not connected this light is not functional Engine Coolant Temperature Gage United States Canada This gage shows the engine coolant temperature If the gage pointer moves into the red area your engine coolant might have overheated and your engine may be too hot You should pull off the road stop your vehicle and turn off the engine as soon as p...

Page 160: ...dex and have your vehicle serviced as soon as you can This light may also come on if your vehicle is equipped with the automatic engine shutdown system and engine shutdown has begun See Engine Automatic Shutdown in the Index Wait to Start Indicator If Equipped This light in the center of the instrument panel will come on when the intake heater is on and the ignition key is in RUN Wait until the in...

Page 161: ...ther of these things happen drive or tow your vehicle to your dealer for service This light should come on when the ignition is on but the engine is not running as a check to show you it is working If it does not come on at all have it repaired NOTICE If you keep driving your vehicle with this light on after a while your emission controls may not work as well your fuel economy may not be as good a...

Page 162: ...u have a diesel engine the normal operating range should be between 35 and 70 psi 240 to 480 kPa A reading in the low pressure zone may be caused by a dangerously low oil level or other problem If you have a CaterpillarR diesel engine also see your CaterpillarR Operation Maintenance Manual CAUTION Don t keep driving if the oil pressure is low If you do your engine can become so hot that it catches...

Page 163: ...see Engine Oil When to Change in the Index To reset the change oil light see GM Oil Life Systemt in the Index Low Oil Level Light This light should come on as a check when you start your engine If the light fails to come on have it repaired as soon as possible so you will be aware when the oil level is low If this light comes on and stays on it means your engine is low on oil You need to check the...

Page 164: ...le may be driven at a reduced speed while the reduced engine power light is on but acceleration and speed may be reduced Anytime the check engine light stays on the vehicle should be taken to an authorized GM dealer as soon as possible for service Engine Overspeed Warning Light If Equipped If your vehicle has this light it will come on if your engine is operating at too many revolutions per minute...

Page 165: ... automatic transmission this gage is located above the switchbank in the center of the instrument panel When your ignition is on the gage shows the temperature of the transmission oil A reading in the warning zone the red area beginning at 300_F 150_C means you must stop driving and check into the cause One possible cause is a low oil level in the transmission NOTICE If you drive when the transmis...

Page 166: ...ever the diesel engine exhaust brake or exhaust restrictor is active For more information see Diesel Engine Exhaust Brake in the Index Diff Lock Indicator Light If Equipped This light located in the center of the instrument panel is on when the inter axle differential lock system is in use The light will come on momentarily during starting If the light fails to come on have it repaired as soon as ...

Page 167: ...uid in the Index Check Gages Indicator Light This light will come on as you re starting the engine just as a check If it ever comes on and stays on while you are driving however it means that either your engine coolant temperature gage or your engine oil pressure gage may be showing a reading in the warning zone When the check gages light comes on you will also hear a warning tone The tone and the...

Page 168: ...your fuel gage D The gage moves a little when you turn a corner or speed up D The gage doesn t go back to empty when you turn off the ignition D At the gas station the pump shuts off before the gage reads full D It takes a little more or less fuel to fill up than the gage indicated If you have a diesel engine also see your CaterpillarR Operation Maintenance Manual Water in Fuel Warning Light If Eq...

Page 169: ...for the rear There should be no more than 4 psi 28 kPa difference showing between the systems Don t drive until both pointers are showing at least 115 psi 793 kPa so you ll have enough air if you need to apply your brakes Air Filter Restriction Indicator Option This optional gage is located above the switchbank in the center of the instrument panel It monitors the engine air filter As the filter g...

Page 170: ...ating 3 5 Defogging and Defrosting 3 5 Rear Window Defogger If Equipped 3 6 Rear Heater If Equipped 3 6 Ventilation System 3 7 Audio Systems 3 7 Setting the Time 3 8 AM FM Radio 3 11 AM FM Radio with Cassette Tape Player If Equipped 3 17 AM FM Radio with Compact Disc Player If Equipped 3 21 Theft Deterrent Feature 3 21 Understanding Radio Reception 3 22 Tips About Your Audio System 3 23 Care of Yo...

Page 171: ...Knob The middle knob on the control panel is used to adjust the temperature of the air flowing into the passenger area of your vehicle Turn the knob toward the red area for warmer air Turn the knob toward the blue area for cooler air Mode Knob The knob on the right side of the control panel is used to select the direction of the air flowing into the vehicle Vent This setting directs air through th...

Page 172: ...oward the red area for warmer air Turn the knob toward the blue area for cooler air Mode Knob The knob on the right side of the control panel is used to select the direction of the air flowing into the vehicle Maximum Air Conditioning Turn the right knob to maximum air conditioning for maximum cooling This setting puts the system in the recirculation mode and helps to maximize your air conditioner...

Page 173: ... area when it s really hot outside and you need to cool the inside air quickly Maximum air conditioning lets in only a little air from the outside If you first use maximum air conditioning you can then use regular air conditioning with the temperature knob in the blue area as soon as the vehicle has cooled down so outside air will be going through your vehicle While in maximum air conditioning reg...

Page 174: ...r window defogger press this button located near the fan control An indicator light in the button will come on when the rear window defogger is working The rear window defogger will only work when the ignition is in RUN The rear window defogger will turn itself off after several minutes If you need additional warming time press the button again Pressing the button when the indicator light is illum...

Page 175: ...tem supplies outside air to the inside of your vehicle when it is moving With the side windows closed air will flow into the front air inlet grilles at the base of the windshield through the vehicle and out the rear air exhaust valve Outside air will also enter the vehicle when the heater or the air conditioning compressor is running Your vehicle has air vents near the center and on the sides of t...

Page 176: ...of objects This helps air to circulate throughout your vehicle Audio Systems Your audio system has been designed to operate easily and to give years of listening pleasure You will get the most enjoyment out of it if you acquaint yourself with it first Find out what your audio system can do and how to operate all of its controls to be sure you re getting the most out of the advanced engineering tha...

Page 177: ...and stay there To scan stations press and hold one of the SEEK arrows for two seconds until you hear a beep The radio will go to a station play for a few seconds and flash the station frequency then go on to the next station Press one of the SEEK arrows again to stop scanning presets To scan preset stations press and hold one of the SEEK arrows for more than four seconds until you hear two beeps T...

Page 178: ...AUDIO To adjust bass and treble press and release AUDIO repeatedly until BAS or TRE appears on the display Then press and hold the up or the down arrow to increase or to decrease If a station is weak or noisy you may want to decrease the treble To adjust bass or treble to the middle position select BAS or TRE Then press and hold AUDIO for more than two seconds until you hear a beep B and a zero or...

Page 179: ...seconds until you hear a beep L and a zero or F and a zero will appear on the display To adjust both tone controls and both speaker controls to the middle position end out of audio by waiting for the display to change to the time display Then press and hold AUDIO for more than two seconds until you hear a beep CEN will appear on the display Fade may not be available if you have a regular cab model...

Page 180: ...he previous station and stay there To scan stations press and hold one of the SEEK arrows for two seconds until you hear a beep The radio will go to a station play for a few seconds and flash the station frequency then go on to the next station Press one of the SEEK arrows again to stop scanning presets To scan preset stations press and hold one of the SEEK arrows for more than four seconds until ...

Page 181: ...reble AUDIO To adjust bass and treble press and release AUDIO until BAS or TRE appears on the display Then press and hold the up or the down arrow to increase or to decrease If a station is weak or noisy you may want to decrease the treble To adjust bass or treble to the middle position select BAS or TRE Then press and hold AUDIO for more than two seconds until you hear a beep B and a zero or T an...

Page 182: ...seconds until you hear a beep L and a zero or F and a zero will appear on the display To adjust both tone controls and both speaker controls to the middle position end out of audio by waiting for the display to change to the time display Then press and hold AUDIO for more than two seconds until you hear a beep CEN will appear on the display Fade may not be available if you have a regular cab model...

Page 183: ... Previous Your tape must have at least three seconds of silence between each selection for previous to work Press this pushbutton to go to the previous selection on the tape if the current selection has been playing for less than 3 seconds If pressed when the current selection has been playing from 3 to 13 seconds it will go to the beginning of the previous selection or the beginning of the curren...

Page 184: ...RPT Repeat Your tape must have at least three seconds of silence between each selection for repeat to work Press this pushbutton once to hear a selection over again RPT will appear on the display Press this button again to turn off repeated play OFF will appear on the display SEEK The right arrow is the same as the NEXT pushbutton and the left arrow is the same as the PREV pushbutton If the arrows...

Page 185: ...See Care of Your Cassette Tape Player in the Index CD Adapter Kits It is possible to use a portable CD player adapter kit with your cassette tape player after deactivating the tight loose tape sensor feature on your tape player To deactivate this feature use the following steps 1 Turn the ignition to RUN or ACCESSORY 2 Turn the radio off 3 Press and hold the TAPE button for two seconds until one b...

Page 186: ...he previous station and stay there To scan stations press and hold one of the SEEK arrows for two seconds until you hear a beep The radio will go to a station play for a few seconds and flash the station frequency then go on to the next station Press one of the SEEK arrows again to stop scanning presets To scan preset stations press and hold one of the SEEK arrows for more than four seconds until ...

Page 187: ...e AUDIO To adjust the bass and treble press and release AUDIO until BAS or TRE appears on the display Then press and hold the up or the down arrow to increase or to decrease If a station is weak or noisy you may want to decrease the treble To adjust bass or treble to the middle position select BAS or TRE Then press and hold AUDIO for more than two seconds until you hear a beep B and a zero or T an...

Page 188: ... of audio mode by waiting for the display to change to the time display Then press and hold AUDIO for more than two seconds until you hear a beep CEN will appear on the display Fade may not be available if you have a regular cab model Radio Messages CAL Calibrated Your audio system has been calibrated for your vehicle from the factory If CAL appears on the display it means that your radio has not ...

Page 189: ...is pushbutton to hear the tracks in random rather than sequential order RND will appear on the display Press this pushbutton again to turn off random play OFF will appear on the display 6 RPT Repeat Press this pushbutton once to hear a track over again RPT will appear on the display The current track will continue to repeat Press this pushbutton again to turn off repeated play OFF will appear on t...

Page 190: ... to discourage theft of your radio The feature works automatically by learning a portion of the Vehicle Identification Number VIN If the radio is moved to a different vehicle it will not operate and LOC will be displayed With THEFTLOCK activated your radio will not operate if stolen Understanding Radio Reception AM The range for most AM stations is greater than for FM especially at night The longe...

Page 191: ... Increase volume slowly until you hear comfortably and clearly NOTICE Before you add any sound equipment to your vehicle like a tape player CB radio mobile telephone or two way radio be sure you can add what you want If you can it s very important to do it properly Added sound equipment may interfere with the operation of your vehicle s engine Delphi Electronics radio or other systems and even dam...

Page 192: ...a scrubbing action non abrasive cleaning cassette with pads which scrub the tape head as the hubs of the cleaner cassette turn The recommended cleaning cassette is available through your dealer GM Part No 12344789 The cut tape detection feature of your cassette tape player may identify the cleaning cassette as a damaged tape To prevent the cleaning cassette from being ejected use the following ste...

Page 193: ...s internal to the CD mechanism Fixed Mast Antenna The fixed mast antenna can withstand most vehicle washes without being damaged If the mast should ever become slightly bent you can straighten it out by hand If the mast is badly bent as it might be by vandals you should replace it Check occasionally to be sure the mast is still tightened to the fender If tightening is required tighten by hand then...

Page 194: ... Driving 4 3 Drunken Driving 4 6 Control of a Vehicle 4 6 Braking 4 10 Traction Control System TCS Option 4 11 Steering 4 13 Off Road Recovery 4 13 Passing 4 15 Loss of Control 4 16 Driving at Night 4 18 Driving in Rain and on Wet Roads 4 21 City Driving 4 22 Freeway Driving 4 23 Highway Hypnosis 4 24 Hill and Mountain Roads 4 26 Winter Driving 4 30 Loading Your Vehicle 4 32 Power Take Off PTO Swi...

Page 195: ...eventable of accidents Yet they are common Allow enough following distance It s the best defensive driving maneuver in both city and rural driving You never know when the vehicle in front of you is going to brake or turn suddenly Defensive driving requires that a driver concentrate on the driving task Anything that distracts from the driving task such as concentrating on a cellular telephone call ...

Page 196: ... alcohol There are good medical psychological and developmental reasons for these laws The obvious way to solve the leading highway safety problem is for people never to drink alcohol and then drive But what if people do How much is too much if the driver plans to drive It s a lot less than many might think Although it depends on each person and situation here is some general information on the pr...

Page 197: ...is 0 05 percent in both France and Germany The BAC limit for all commercial drivers in the United States is 0 04 percent The BAC will be over 0 10 percent after three to six drinks in one hour Of course as we ve seen it depends on how much alcohol is in the drinks and how quickly the person drinks them But the ability to drive is affected well below a BAC of 0 10 percent Research shows that the dr...

Page 198: ...l in a person s system can make crash injuries worse especially injuries to the brain spinal cord or heart This means that when anyone who has been drinking driver or passenger is in a crash that person s chance of being killed or permanently disabled is higher than if the person had not been drinking CAUTION Drinking and then driving is very dangerous Your reflexes perceptions attentiveness and j...

Page 199: ...g up your foot and do it That s reaction time Average reaction time is about 3 4 of a second But that s only an average It might be less with one driver and as long as two or three seconds or more with another Age physical condition alertness coordination and eyesight all play a part So do alcohol drugs and frustration But even in 3 4 of a second a vehicle moving at 60 mph 100 km h travels 66 feet...

Page 200: ...wer assist is used up it may take longer to stop and the brake pedal will be harder to push Hydraulic Brake Systems If your engine stops running or if your primary brake system stops working your vehicle has a reserve power assist system to help you slow down Just slowly and steadily apply the brake pedal until you can safely get off the road The pedal will seem harder to push down Don t pump the ...

Page 201: ...e this test is going on This is normal If there s a problem with the anti lock brake system this warning light will stay on See Anti Lock Brake System Warning Light in the Index Let s say the road is wet and you re driving safely Suddenly an animal jumps out in front of you You slam on the brakes and continue braking Here s what happens with ABS A computer senses that wheels are slowing down If on...

Page 202: ... the brake pedal or always decrease stopping distance If you get too close to the vehicle in front of you you won t have time to apply your brakes if that vehicle suddenly slows or stops Always leave enough room up ahead to stop even though you have anti lock brakes Using Anti Lock Don t pump the brakes Just hold the brake pedal down firmly and let anti lock work for you You may feel the brakes pu...

Page 203: ... roads When the light in the top of the TCS button is on the TCS is off and will not limit wheel spin Adjust your driving accordingly The light in the top of the TCS button will come on if the TCS is turned off by pressing the TCS on off button The light may also come on if a problem has been detected in either the traction control system or the anti lock brake system The traction control system a...

Page 204: ...ires and the road surface the angle at which the curve is banked and your speed While you re in a curve speed is the one factor you can control Suppose you re steering through a sharp curve Then you suddenly accelerate Both control systems steering and acceleration have to do their work where the tires meet the road Adding the sudden acceleration can demand too much of those places You can lose co...

Page 205: ...ible collision Then steer around the problem to the left or right depending on the space available Since your vehicle has anti lock brakes you don t need to release the brakes to maintain steering control An emergency like this requires close attention and a quick decision If you are holding the steering wheel at the recommended 9 and 3 o clock positions you may be able to turn it just enough to m...

Page 206: ... around the vehicle ahead then goes back into the right lane again A simple maneuver Not necessarily Passing another vehicle on a two lane highway is a potentially dangerous move since the passing vehicle occupies the same lane as oncoming traffic for several seconds A miscalculation an error in judgment or a brief surrender to frustration or anger can suddenly put the passing driver face to face ...

Page 207: ...art that more than makes up for the distance you would lose by dropping back And if something happens to cause you to cancel your pass you need only slow down and drop back again and wait for another opportunity D If other cars are lined up to pass a slow vehicle wait your turn But take care that someone isn t trying to pass you as you pull out to pass the slow vehicle D Check your mirrors and sta...

Page 208: ...sing your foot off the accelerator pedal If you have the Traction Control System remember It helps avoid only the acceleration skid If you do not have this system or if the system is off then an acceleration skid is also best handled by easing your foot off the accelerator pedal Of course traction is reduced when water snow ice gravel or other material is on the road For safety you ll want to slow...

Page 209: ...see as well you may need to slow down and keep more space between you and other vehicles D Slow down especially on higher speed roads Your headlamps can light up only so much road ahead D In remote areas watch for animals D If you re tired pull off the road in a safe place and rest No one can see as well at night as in the daytime But as we get older these differences increase A 50 year old driver...

Page 210: ...ith misaimed headlamps slow down a little Avoid staring directly into the approaching headlamps Keep your windshield and all the glass on your vehicle clean inside and out Glare at night is made much worse by dirt on the glass Even the inside of the glass can build up a film caused by dust Dirty glass makes lights dazzle and flash more than clean glass would making the pupils of your eyes contract...

Page 211: ...et wet suddenly when your reflexes are tuned for driving on dry pavement The heavier the rain the harder it is to see Even if your windshield wiper blades are in good shape a heavy rain can make it harder to see road signs and traffic signals pavement markings the edge of the road and even people walking It s wise to keep your wiping equipment in good shape and keep your windshield washer tank fil...

Page 212: ...ning is dangerous So much water can build up under your tires that they can actually ride on the water This can happen if the road is wet enough and you re going fast enough When your vehicle is hydroplaning it has little or no contact with the road Hydroplaning doesn t happen often But it can if your tires do not have much tread or if the pressure in one or more is low It can happen if a lot of w...

Page 213: ...tinued CAUTION Continued carried away As little as six inches of flowing water can carry away a smaller vehicle If this happens you and the other vehicle occupants could drown Don t ignore police warning signs and otherwise be very cautious about trying to drive through flowing water Some Other Rainy Weather Tips D Turn on your low beam headlamps and your marker and clearance lamps if your vehicle...

Page 214: ...try trip D Larger vehicles can t be driven everywhere smaller ones can There are low underpasses truck routes and other special situations Usually these are well marked so be sure to watch for the signs D Try to use the freeways that rim and crisscross most large cities You ll save time and energy See the next part Freeway Driving D Treat a green light as a warning signal A traffic light is there ...

Page 215: ...gap at close to the prevailing speed Switch on your turn signal check your mirrors and try to blend smoothly with the traffic flow Once you are on the freeway adjust your speed to the posted limit or to the prevailing rate if it s slower Stay in the right lane unless you want to pass On some freeways larger vehicles aren t allowed to use some lanes These places usually are well marked Before chang...

Page 216: ... of the tires on the road the drone of the engine and the rush of the wind against the vehicle that can make you sleepy Don t let it happen to you If it does your vehicle can leave the road in less than a second and you could crash and be injured What can you do about highway hypnosis First be aware that it can happen Then here are some tips D Make sure your vehicle is well ventilated with a comfo...

Page 217: ...stem and transmission These parts can work hard on mountain roads D Know how to go down hills The most important thing to know is this let your engine do some of the slowing down Shift to a lower gear when you go down a steep or long hill CAUTION If you don t shift down your brakes could get so hot that they wouldn t work well You would then have poor braking or even none going down a hill You cou...

Page 218: ...lp cool your engine and transmission and you can climb the hill better D Stay in your own lane when driving on two lane roads in hills or mountains Don t swing wide or cut across the center of the road Drive at speeds that let you stay in your own lane D As you go over the top of a hill be alert There could be something in your lane like a stalled car or an accident D You may see highway signs on ...

Page 219: ...ice scraper a small brush or broom a supply of windshield washer fluid a rag some winter outer clothing a small shovel a flashlight a red cloth and reflective warning triangles And if you will be driving under severe conditions include a small bag of sand a piece of old carpet or a couple of burlap bags to help provide traction Be sure you properly secure these items in your vehicle ...

Page 220: ...e when it s about freezing 32_F 0_C and freezing rain begins to fall Try to avoid driving on wet ice until salt and sand crews can get there Whatever the condition smooth ice packed blowing or loose snow drive with caution If you have traction control keep the system on It will improve your ability to accelerate when driving on a slippery road But you can turn the traction system off if you ever n...

Page 221: ...can t reach around clumps of trees behind buildings or under bridges Sometimes the surface of a curve or an overpass may remain icy when the surrounding roads are clear If you see a patch of ice ahead of you brake before you are on it Try not to brake while you re actually on the ice and avoid sudden steering maneuvers If You re Caught in a Blizzard If you are stopped by heavy snow you could be in...

Page 222: ... it or smell it so you might not know it is in your vehicle Clear away snow from around the base of your vehicle if any is blocking your exhaust pipe And check around again from time to time to be sure snow doesn t collect there Open a window just a little on the side of the vehicle that s away from the wind This will help keep CO out Run your engine only as long as you must This saves fuel When y...

Page 223: ...as little as possible Preserve the fuel as long as you can To help keep warm you can get out of the vehicle and do some fairly vigorous exercises every half hour or so until help comes Loading Your Vehicle There is a GVW Rating label on your vehicle that shows how much weight it may properly carry It also shows the size of your original tires and the inflation pressures needed to obtain the gross ...

Page 224: ... center line Never exceed the GVWR for your vehicle or the GAWR for either the front or rear axle And if you do have a heavy load you should spread it out CAUTION Do not load your vehicle any heavier than the GVWR or either the maximum front or rear GAWR If you do parts on your vehicle can break and it can change the way your vehicle handles These could cause you to lose control and crash Also ove...

Page 225: ...o spread the weight evenly D Never stack heavier things like suitcases inside the vehicle so that some of them are above the tops of the seats D Don t leave an unsecured child restraint in your vehicle D When you carry something inside the vehicle secure it whenever you can D Don t leave a seat folded down unless you need to Power Take Off PTO Switch If Equipped If your vehicle is equipped for the...

Page 226: ... that can occur on the road 5 2 Hazard Warning Flashers 5 3 Other Warning Devices 5 3 Jump Starting 5 10 Towing Your Vehicle 5 17 Engine Overheating 5 20 Cooling System 5 26 Engine Fan Noise 5 26 If a Tire Goes Flat 5 27 Changing a Flat Tire 5 28 If You re Stuck In Sand Mud Ice or Snow ...

Page 227: ...utton is located on top of the steering column Your hazard warning flashers work no matter what position your key is in and even if the key isn t in Press the button to make the front and rear turn signal lamps flash on and off Press the button again to turn the flashers off When the hazard warning flashers are on your turn signals won t work The hazard warning flashers will not flash if the brake...

Page 228: ... enough electricity to burn you If you don t follow these steps exactly some or all of these things can hurt you NOTICE Ignoring these steps could result in costly damage to your vehicle that wouldn t be covered by your warranty The ACDelcoR battery in your vehicle has a built in hydrometer Do not charge test or jump start the battery if the hydrometer looks clear or light yellow Replace the batte...

Page 229: ...n t want You wouldn t be able to start your vehicle and the bad grounding could damage the electrical systems To avoid the possibility of the vehicles rolling set the parking brake firmly on both vehicles involved in the jump start procedure Put an automatic transmission in PARK P or a manual transmission in neutral before setting the parking brake NOTICE If you leave your radio on it could be bad...

Page 230: ...tteries for jump starting The remote positive terminal is for that purpose CAUTION Using a match near a battery can cause battery gas to explode People have been hurt doing this and some have been blinded Use a flashlight if you need more light Be sure the batteries have enough water You don t need to add water to the ACDelcoR battery or batteries installed in your new vehicle But if a battery has...

Page 231: ...ve will go to positive or to a remote positive terminal if the vehicle has one Negative will go to a heavy unpainted metal engine part or to a remote negative terminal if the vehicle has one Don t connect the positive to negative or you ll get a short that would damage the battery and maybe other parts too And don t connect the negative cable to the negative terminal on the dead battery because th...

Page 232: ...the black negative cable to the negative terminal of the good battery Use a remote negative terminal if the vehicle has one Don t let the other end touch anything until the next step The other end of the negative cable doesn t go to the dead battery It goes to a heavy unpainted metal engine part or to the remote negative terminal on the vehicle with the dead battery ...

Page 233: ...le with the good battery and run the engine for one or two minutes If your vehicle has the high idle option use it 11 Try to start the vehicle with the dead battery If it won t start after a few tries it probably needs service NOTICE Damage to your vehicle may result from electrical shorting if jumper cables are removed incorrectly To prevent electrical shorting take care that they don t touch eac...

Page 234: ...he jumper cables from both vehicles do the following 1 Disconnect the black negative cable from the vehicle that had the dead battery 2 Disconnect the black negative cable from the vehicle with the good battery 3 Disconnect the red positive cable from the vehicle with the good battery 4 Disconnect the red positive cable from the other vehicle 5 Return the positive remote terminal cover to its orig...

Page 235: ...tinued D When the brake springs are manually compressed you will have no brakes Release your air operated parking brakes manually only to tow the vehicle Never drive the vehicle with the brakes released Consult your dealer or a professional towing service if you need to have your vehicle towed They can provide the right equipment and know how to tow it without damage See Roadside Assistance in the...

Page 236: ...ver to the fully released position Disconnect the propshaft at the rear axle forward axle on tandem axle models Secure the propshaft to the frame or crossmember Towing the Vehicle with the Front Bumper Removed 1 Remove the front bumper 2 Connect and lock the lift chains to the front axle outside of the spring anchor plates as shown A Spring Anchor Plate B Lift Chain C Front Axle 3 Place a 6 x 6 x ...

Page 237: ...le outside of the spring anchor plates as previously shown 2 Place a 6 x 6 x 5 hardwood beam underneath and slightly behind the front spring shackle brackets as previously shown 3 Connect the lift chains to the tow bar and take up the slack in the chains until the tow bar is within 4 of the front bumper facing Place a 2 x 12 x 40 hardwood board with rubber pads against the front bumper and secure ...

Page 238: ...et D Lift Chain E Hardwood Beam F Bumper G Tow Bar 4 Remove the remaining slack in the lift chains The tow bar swing arm should rest against the 2 x 12 x 40 hardwood board as shown A Hardwood Board B Swing Arm 5 Raise the vehicle to the required height ...

Page 239: ... on the Ground Due to Type of Suspension or Attached Load Disconnect the propshaft at the forward tandem axle Secure the propshaft to the frame or crossmember If there is damage or suspected damage to the axle s remove all axle shafts Cover the hub openings to prevent the loss of lubricant or entry of dirt or foreign objects After Towing 1 Block the rear wheels and install axle and propshafts 2 Ch...

Page 240: ... models Secure the propshaft to the frame or crossmember If there is damage or suspected damage to the axle s remove the axle shafts Cover the hub openings to prevent the loss of lubricant or entry of dirt or foreign objects After Towing 1 Block the rear wheels and install axle and propshafts 2 Check for proper phasing of universal joints 3 Apply the parking brake system before disconnecting from ...

Page 241: ...tow operator can release the brakes manually by using the following steps Then your vehicle can be towed with all wheels or only the rear wheels on the ground 1 Block the wheels of the vehicle 2 Remove the release stud and nut from the side of the brake chamber Some chambers have studs which are visible at all times 3 Remove the rubber cap from the rear of the chamber 4 Put the release stud nut an...

Page 242: ...air supply or the vehicle s air system 8 Turn the stud nut counterclockwise several turns Remove the stud from the chamber 9 Replace the stud and washer and tighten the nut into the side of the chamber 10 Replace the rubber cap Engine Overheating You will find a coolant temperature warning gage on your vehicle s instrument panel as well as a low coolant warning light Your vehicle also has a check ...

Page 243: ... it cools down Wait until there is no sign of steam or coolant before you open the hood If you keep driving when your engine is overheated the liquids in it can catch fire You or others could be badly burned Stop your engine if it overheats and get out of the vehicle until the engine is cool NOTICE If your engine catches fire because you keep driving with no coolant your vehicle can be badly damag...

Page 244: ...d shift to park or neutral and let the engine idle 2 Turn on your heater to full hot at the highest fan speed and open the window as necessary 3 If climbing a hill downshift to raise engine and fan speeds If you no longer have the overheat warning you can drive Just to be safe drive slower for about 10 minutes If the warning doesn t come back on you can drive normally If the warning continues and ...

Page 245: ...peration and Maintenance Manual provided with your vehicle If the coolant inside the coolant surge tank is boiling don t do anything else until it cools down The vehicle should be parked on a level surface The coolant level should be at COLD FILL or higher If it isn t you may have a leak at the pressure cap or in the radiator hoses heater hoses radiator water pump or somewhere else in the cooling ...

Page 246: ...s doubled by pushing the accelerator pedal down If it doesn t your vehicle needs service Turn off the engine NOTICE Engine damage from running your engine without coolant isn t covered by your warranty NOTICE When adding coolant it is important that you use only DEX COOLR silicate free coolant If coolant other than DEX COOL is added to the system premature engine heater core or radiator corrosion ...

Page 247: ...ore you do it See Engine Coolant in the Index for more information If no coolant is visible in the surge tank add coolant as follows CAUTION Steam and scalding liquids from a hot cooling system can blow out and burn you badly They are under pressure and if you turn the coolant surge tank pressure cap even a little they can come out at high speed CAUTION Continued CAUTION Continued Never turn the c...

Page 248: ... In cold weather water can freeze and crack the engine radiator heater core and other parts Use the recommended coolant and the proper coolant mixture CAUTION You can be burned if you spill coolant on hot engine parts Coolant contains ethylene glycol and it will burn if the engine parts are hot enough Don t spill coolant on a hot engine 1 Park the vehicle on a level surface You can remove the cool...

Page 249: ...5 24 2 Then keep turning the pressure cap slowly and remove it 3 Then fill the coolant surge tank with the proper mixture to the FULL mark ...

Page 250: ... hot Watch out for the engine cooling fan By this time the coolant level inside the coolant surge tank may be lower If the level is lower add more of the proper mixture to the coolant surge tank until the level reaches slightly above the FULL mark 5 Then replace the pressure cap Be sure the pressure cap is hand tight and fully seated ...

Page 251: ... out while you re driving especially if you maintain your tires properly If air goes out of a tire it s much more likely to leak out slowly But if you should ever have a blowout here are a few tips about what to expect and what to do If a front tire fails the flat tire will create a drag that pulls the vehicle toward that side Take your foot off the accelerator pedal and grip the steering wheel fi...

Page 252: ...was quite low on air the tire can have a sudden air out This could cause you to lose control of the vehicle and have a serious crash Don t refill a flat or very low tire with air without first having the tire taken off the wheel and checked for damage So if you re stopped somewhere by a flat or damaged tire or wheel you should get expert help See Roadside Assistance in the Index CAUTION Your vehic...

Page 253: ...ls too fast while shifting your transmission back and forth you can destroy your transmission Rocking Your Vehicle To Get It Out First turn your steering wheel left and right That will clear the area around your front wheels If your vehicle has traction control you should turn your traction control system off See Traction Control System in the Index Then shift back and forth between REVERSE R and ...

Page 254: ... to some place where you can continue driving CAUTION These hooks when used are under a lot of force Always pull the vehicle straight out Never pull on the hooks at a sideways angle The hooks could break off and you or others could be injured from the chain or cable snapping back NOTICE Never use the tow hooks to tow the vehicle Your vehicle could be damaged and it would not be covered by warranty...

Page 255: ...l Gasoline Engines 6 27 Engine Oil CaterpillarR Diesel Engines 6 27 Engine Oil DURAMAXtDiesel 6 30 Engine Air Cleaner Filter 6 32 Automatic Transmission Fluid 6 32 Manual Transmission Fluid 6 34 Rear Axle 6 34 Rear Axle Shift Motor Option 6 35 Engine Coolant 6 38 Engine Coolant CaterpillarR Diesel Engine 6 38 Surge Tank Pressure Cap 6 39 Power Steering Fluid 6 40 Windshield Washer Fluid 6 41 Brake...

Page 256: ...an To order the proper service manual see Service and Owner Publications in the Index You should keep a record with all parts receipts and list the mileage and the date of any service work you perform See Maintenance Record in the Index CAUTION You can be injured and your vehicle could be damaged if you try to do service work on a vehicle without knowing enough about it D Be sure you have sufficie...

Page 257: ...Don t change the fan drive ratio or increase the governed speed of the vehicle without getting the necessary information from your dealer CAUTION Continued CAUTION Continued Winter Fronts Grille Covers or Obstructions Winter fronts grille covers or other add on equipment causing obstructions in front or behind the fan should not be used on this vehicle They may increase the stress on the fan as th...

Page 258: ...ociation and endorsed by the Canadian Vehicle Manufacturers Association for better vehicle performance and engine protection Gasolines meeting these specifications could provide improved driveability and emission control system performance compared to other gasolines In Canada look for the Auto Makers Choice label on the pump Canada Only Additives Some gasolines that are not reformulated for low e...

Page 259: ...fuel containing methanol It can corrode metal parts in your fuel system and also damage plastic and rubber parts That damage wouldn t be covered under your warranty Diesel Fuel Requirements and Fuel System Diesel Engine Fuel For the CaterpillarR diesel see the CaterpillarR Operation Maintenance Manual for information concerning fuel usage NOTICE Diesel fuel or fuel additives not recommended in thi...

Page 260: ...acturers Association EMA has identified properties of an improved diesel fuel for better engine performance and durability Diesel fuels corresponding to the EMA Recommended Guideline on Premium Diesel Fuel FQP 1A could provide better starting less noise and better vehicle performance If there are questions about the fuel you are using contact your fuel supplier Diesel fuel may foam when you fill y...

Page 261: ...educed performance excessive smoke and unpleasant odor At a minimum the diesel fuel you use should meet specifications CAN CGSB 3 517 2000 Low Sulfur Diesel in Canada In addition the Engine Manufacturers Association EMA has identified properties of an improved diesel fuel for better engine performance and durability FQP 1A Diesel fuels corresponding to the EMA description could provide better star...

Page 262: ...uel biocide to sterilize your fuel system Your dealer can advise you if you ever need this If your fuel tank needs to be purged to remove water see your dealer or a qualified technician Improper purging can damage your fuel system Sometimes water can be pumped into your fuel tank along with your diesel fuel This can happen if a service station doesn t regularly inspect and clean its fuel tanks or ...

Page 263: ...ntermittently Drain water from fuel filter Indicator stays on S At temperatures above freezing Drain fuel filter immediately If no water can be drained and light stays on see your dealer for assistance S At temperatures below freezing Drain fuel filter immediately If no water can be drained water may be frozen in water drain system Water may be frozen in the fuel lines Move the vehicle to a warm l...

Page 264: ... diesel fuel see What to Do with Used Oil in the Engine Oil Diesel Engines part later in this section 6 Install the fuel cap 7 Start the engine and let it run for a few minutes If the engine stalls the fuel system may need to be primed While draining the water from the fuel filter air may enter the fuel system If air has entered the fuel system the fuel system will need to be primed Refer to Fuel ...

Page 265: ...the engine may not be able to start until the fuel system is primed and the air is removed Q How do I prime the vehicle A Your vehicle is equipped with a priming pump which is part of the engine mounted fuel filter The vent valve and the fuel filter primer pump are located on top of the fuel filter housing The priming pump is hand operated and is designed to bring fuel to the engine to eliminate a...

Page 266: ...hand Let the pump return upward between presses 7 Operate the priming pump until a small amount of fuel seeps from the vent valve When you see the fuel the filter is now full of fuel and the system should be primed 8 Close the vent valve 9 Clean any fuel which accumulated on the fuel filter 10 Start the engine and let it idle for a few minutes 11 Check the filter for leaks ...

Page 267: ... you re parked on a level surface add at least two gallons of fuel to each fuel tank your vehicle may have However if you re parked on a slope you may need to add up to five gallons of fuel 2 Follow the fuel priming procedure earlier in this section to prime the fuel filter 3 Close the air bleed valve 4 Turn the ignition key to START for 10 to 15 seconds at a time until your engine starts If the e...

Page 268: ...cle or on the driver s side frame rail in front of the fuel tank 1 Apply the parking brake 2 Unplug the water sensor wire connected to the fuel filter and unscrew the filter element 3 Remove the filter element If there is any dirt on the filter sealing surface clean it off Remove and reuse the water sensor float switch located on the bottom of the fuel filter 4 Install the new filter element 5 Rei...

Page 269: ...hard to find Never use leaded gasoline or any other fuel not recommended in the previous text on fuel Costly repairs caused by use of improper fuel wouldn t be covered by your warranty To check on fuel availability ask an auto club or contact a major oil company that does business in the country where you ll be driving Filling Your Tank C4 C5 Models ...

Page 270: ...tent To take off the cap turn it slowly to the left counterclockwise CAUTION Gasoline Engine Vehicles If you get gasoline on you and then something ignites it you could be badly burned Gasoline can spray out on you if you open the fuel cap too quickly This spray can happen if your tank is nearly full and is more likely in hot weather Open the fuel filler cap slowly and wait for any hiss noise to s...

Page 271: ...ntainer CAUTION Never fill a portable fuel container while it is in your vehicle Static electricity discharge from the container can ignite the gasoline vapor You can be badly burned and your vehicle damaged if this occurs To help avoid injury to you and others D Dispense gasoline only into approved containers D Do not fill a container while it is inside a vehicle in a vehicle s trunk pickup bed o...

Page 272: ...ke fuel oil coolant brake fluid windshield washer and other fluids and plastic or rubber You or others could be burned Be careful not to drop or spill things that will burn onto a hot engine Hood Latches To tilt the hood forward pull back and up on each of the hood latches located above the wheel wells on both sides of the vehicle ...

Page 273: ...6 19 Then take the hand hold and pull the hood forward When you tilt the hood far enough the cables will support it ...

Page 274: ...en in your warranty booklet These standards apply only to vehicles sold in the United States Tampering With Noise Control System Prohibited Federal law prohibits the following acts or the causing thereof 1 The removal or rendering inoperative by any person other than for purposes of maintenance repair or replacement of any device or element of design incorporated into any new vehicle for the purpo...

Page 275: ...quipped or rendering clutch inoperative D Removal of the fan shroud if equipped Air Intake D Removal of the air cleaner silencer D Modification of the air cleaner Exhaust D Removal of the muffler and or resonator D Removal of the exhaust pipes and exhaust pipe clamps Engine Oil Gasoline Engine If the low oil light appears on the instrument cluster it means you need to check your engine oil level r...

Page 276: ... engine oil dipstick is located in the engine compartment on the driver s side of the vehicle Turn off the engine and give the oil several minutes to drain back into the oil pan If you don t the oil dipstick might not show the actual level Pull out the dipstick and clean it with a paper towel or cloth then push it back in all the way Remove it again keeping the tip down and check the level ...

Page 277: ...in the Index NOTICE Don t add too much oil If your engine has so much oil that the oil level gets above the cross hatched area upper mark that shows the proper operating range your engine could be damaged The engine oil fill cap is located near the engine oil dipstick in the engine compartment on the driver s side of the vehicle Be sure to fill it enough to put the level somewhere in the proper op...

Page 278: ...ute API Do not use any oil which does not carry this starburst symbol If you change your own oil be sure you use oil that has the starburst symbol on the front of the oil container If you have your oil changed for you be sure the oil put into your engine is American Petroleum Institute certified for gasoline engines You should also use the proper viscosity oil for your vehicle as shown in the visc...

Page 279: ...ne Oil GM Oil Life Systemt Your vehicle has a computer system that lets you know when to change the engine oil and filter This is based on engine revolutions and engine temperature and not on mileage Based on driving conditions the mileage at which an oil change will be indicated can vary considerably For the oil life system to work properly you must reset the system every time the oil is changed ...

Page 280: ...peat the steps What to Do with Used Oil Used engine oil contains certain elements that may be unhealthy for your skin and could even cause cancer Don t let used oil stay on your skin for very long Clean your skin and nails with soap and water or a good hand cleaner Wash or properly throw away clothing or rags containing used engine oil See the manufacturer s warnings about the use and disposal of ...

Page 281: ...is located in the engine compartment on the driver s side of the vehicle In order to get an accurate reading the oil must be warm at normal operating temperature and the vehicle must be on level ground Turn off the engine and give the oil at least five minutes to drain back into the oil pan With a cool engine allow 30 minutes If you don t the oil dipstick might not show the actual level Pull out t...

Page 282: ...e could be damaged Be sure to fill it enough to put the level somewhere in the proper operating range Push the dipstick all the way back in when you re through What Kind of Engine Oil to Use Look for these two things D CH 4 Oils designated as API CH 4 are best for your vehicle The CH 4 designation may appear either alone or in combination with other API designations such as API CH 4 SJ or CH 4 CG ...

Page 283: ...er show its viscosity or thickness Do not use other viscosity oils such as SAE 10W 40 or SAE 20W 50 This doughnut shaped logo symbol is used on most oil containers to help you select the correct oil It means that the oil has been certified by the American Petroleum Institute You should look for this on the oil container and use only those oils that display the logo GM GoodwrenchR oil of the recomm...

Page 284: ...t the use and disposal of oil products Used oil can be a threat to the environment If you change your own oil be sure to drain all the oil from the filter before disposal Never dispose of oil by putting it in the trash pouring it on the ground into sewers or into streams or bodies of water Instead recycle it by taking it to a place that collects used oil If you have a problem properly disposing of...

Page 285: ...er off can cause you or others to be burned The air cleaner not only cleans the air it stops flame if the engine backfires If it isn t there and the engine backfires you could be burned Don t drive with it off and be careful working on the engine with the air cleaner filter off NOTICE Gasoline Engines Only If the air cleaner filter is off a backfire can cause a damaging engine fire And dirt can ea...

Page 286: ...l Filter Your automatic transmission filter requires periodic replacement Consult the Allison Automatic Transmission Operator s Manual that came with the vehicle for proper change intervals Manual Transmission Fluid Refer to the Maintenance Schedule to determine how often to check the lubricant and when to change it See Scheduled Maintenance Services in the Index Refer to the Maintenance Schedule ...

Page 287: ...ons an inch of oil level equals about one gallon of fluid 3 If the fluid level is good install the plug and be sure it is fully seated If the fluid level is low add more fluid as described in the next steps How to Add Fluid Here s how to add fluid Refer to the Maintenance Schedule to determine the proper fluid to use See Recommended Fluids and Lubricants in the Index 1 Remove the filler plug 2 Add...

Page 288: ... determine what kind of lubricant to use See Recommended Fluids and Lubricants in the Index Rear Axle Shift Motor Option When to Check and Change Fluid If you have an optional air shift two speed controlled traction or locking differential type rear axle a good time to check the fluid level in the axle shift motor is when the rear axle lubricant is checked Use refrigerant oil shift motor only How ...

Page 289: ... see Engine Overheating in the Index A 50 50 mixture of clean drinkable water and DEX COOLR coolant will D Give freezing protection down to 34_F 37_C D Give boiling protection up to 252_F 122_C D Protect against rust and corrosion D Help keep the proper engine temperature D Let the warning lights and gages work as they should NOTICE When adding coolant it is important that you use only DEX COOLR s...

Page 290: ...r engine could get too hot but you wouldn t get the overheat warning Your engine could catch fire and you or others could be burned Use a 50 50 mixture of clean drinkable water and DEX COOLR coolant NOTICE If you use an improper coolant mixture your engine could overheat and be badly damaged The repair cost wouldn t be covered by your warranty Too much water in the mixture can freeze and crack the...

Page 291: ...scalding liquids to blow out and burn you badly Never turn the surge tank pressure cap even a little when the engine and radiator are hot The vehicle must be on a level surface When your engine is cold the coolant level should be at the COLD FILL mark or higher If the low coolant light comes on and stays on it means you re low on engine coolant See Lights Low Coolant Warning Light in the Index for...

Page 292: ...sel Engine If your vehicle has a Caterpillar diesel engine see the CaterpillarR Diesel Engine Operation Maintenance Manual provided with your vehicle to find out what to add also when and how to service your cooling system Surge Tank Pressure Cap The surge tank pressure cap is located in the engine compartment on the driver s side of the vehicle The surge tank pressure cap must be tightly installe...

Page 293: ...er steering fluid level is low this can cause the BRAKE or service brake soon warning lights to come on If either light remains on after you have added power steering fluid to the proper level then shut off the engine for 10 seconds This should reset the brake warning lights If one or both lights stay on though see Hydraulic Brake Warning Lights in the Index What to Use To determine what kind of f...

Page 294: ... the temperature may fall below freezing use a fluid that has sufficient protection against freezing Adding Washer Fluid Your vehicle has a low washer fluid light that lets you know when to add washer fluid The windshield washer reservoir is located in the engine compartment on the driver s side of the vehicle Open the cap with the washer symbol on it Add washer fluid until the tank is full ...

Page 295: ...nsion if freezing occurs which could damage the tank if it is completely full D Don t use engine coolant antifreeze in your windshield washer It can damage your washer system and paint Brakes Brake Fluid If your vehicle has hydraulic brakes there s a brake master cylinder Refer to the Maintenance Schedule to determine when to check your brake fluid CAUTION Don t add brake fluid before you check th...

Page 296: ... s side of the vehicle If it s low add enough fluid to fill the reservoir to the proper level Checking Brake Fluid Hydro Boost System Apply the brake pedal several times with the ignition off Clean the cover and the side of the reservoir Check to see if the fluid level inside the reservoir falls within the MIN MAX level indicator on the side of the reservoir The Hydro Boost brake fluid reservoir i...

Page 297: ... all This could cause a crash Always use the proper brake fluid NOTICE D Using the wrong fluid can badly damage brake system parts For example just a few drops of mineral based oil such as engine oil in your brake system can damage brake system parts so badly that they ll have to be replaced Don t let someone put in the wrong kind of fluid and don t use DOT 5 silicone brake fluid D If you spill br...

Page 298: ...s does not mean something is wrong with your brakes Brake linings should always be replaced as complete axle sets Four Wheel and Six Wheel Drum Brakes Air Only The brake drums should be removed and inspected each time the tires are removed for rotation or changing When you have the front brakes replaced have the rear brakes inspected too Brake linings should always be replaced as complete axle set...

Page 299: ...cle is to have really good braking Your vehicle was designed and tested with top quality GM brake parts When you replace parts of your braking system for example when your brake linings wear down and you need new ones put in be sure you get new approved GM replacement parts If you don t your brakes may no longer work properly For example if someone puts in brake linings that are wrong for your veh...

Page 300: ...essure To be sure you re at full pressure check your air pressure gage It should read at least 100 psi 692 kPa Moisture Ejector Option If you have air brakes with a moisture ejector the valve automatically ejects moisture from the reserve tank when the air compressor cycles Air Dryer If your vehicle has air brakes you have an air dryer This collects and removes dirt moisture or other foreign matte...

Page 301: ...is Clutch Pedal Free Travel If you have a manual transmission your clutch will need adjustment when pedal free travel gets down to about 1 4 inch 32 mm as measured at the clutch pedal pad You should have 1 1 2 to 2 inches 38 to 51 mm of clutch pedal free travel See Maintenance Schedule in the Index for more information If your clutch ever needs service be sure to use only genuine GM clutch replace...

Page 302: ...6 48 Single Axle Models ...

Page 303: ...5 Pivot Points and Hinges Apply chassis lubricant 6 Slack Adjuster n One fitting 7 Brake Cam Roller Pins at interface of pin and shoe n Apply engine oil 8 Front Steering Knuckles One fitting each side lower bushing hand operated grease gun only Hand pack upper bearing 9 Front Wheel Bearings Hand pack or lubricate 10 Steering Tie Rod Ends One fitting each end 11 Spring Slip Pads Multi Leaf Only App...

Page 304: ...ricant 16 Parking Brake Clevis Pins Apply chassis lubricant 17 Parking Brake Lever Pivot Apply chassis lubricant 18 Clutch Release Cross Shaft Master Cylinder Apply chassis lubricant Fill to 1 4 6 mm below opening 19 Release Bearing Clutch Cross Shaft Two fittings Apply chassis lubricant 20 Clutch Release Fork Two fittings Applies to some vehicles nApplies to air brakes only Refer to Allison Trans...

Page 305: ...ne fitting each 2 Propshaft U Joint One fitting each joint Lubricate with GM Part No 1051344 Wheel Bearing Lubricant 4 Brake Shoe Roller Pins Apply engine oil at pin to shoe joint only 5 Rear Spring Pin One fitting each side 6 Rear Axles Fill to level of filler plug ...

Page 306: ...ou re not going to drive your vehicle for 25 days or more remove the black negative cable from the battery This will help keep your battery from running down If your vehicle has more than one battery be sure to remove the negative battery cable from each battery CAUTION Batteries have acid that can burn you and gas that can explode You can be badly hurt if you aren t careful See Jump Starting in t...

Page 307: ...the Index for more information Replacement blades come in different types and are removed in different ways Here s how to remove the Shephard s Hook type 1 Pull the windshield wiper arm away from the windshield 2 Push the release lever and slide the wiper assembly toward the driver s side of the vehicle 3 Install a new blade by reversing Steps 1 and 2 ...

Page 308: ...e is equipped with the optional Davco spin on type filter it is located on the driver s side frame rail Fuel Filter Diesel Engines If you have a diesel engine your fuel filter is located in the engine compartment on the driver s side of the vehicle or along the driver s side frame rail See Fuel Filter Replacement earlier in this section for further information Also see your Maintenance Schedule fo...

Page 309: ... proper disposal procedures Secondary Fuel Filter and Water Separator Heater If Equipped If you have a CaterpillarR diesel engine you may also have this spin on filter and fuel separator heater It will be mounted in the engine compartment on the driver s side of the vehicle It has a metal drain bowl at the bottom Occasionally check the bowl for any water or particles To check or drain the bowl do ...

Page 310: ... the neck of the cylinder and the top of the valve before you take out the cylinder 4 Check the inside of the valve for any foreign matter Clean the valve as necessary 5 Cover the valve to protect it from dirt and take out the cylinder 6 Install a new gasket whenever you take out the cylinder Use only one gasket and spread a light film of clean oil on it before installation 7 Put in the new cylind...

Page 311: ... it up to the level mark that you ll see on the glass Refer to your Maintenance Schedule for the proper oil to use When you fill the hub check the glass again after driving a short distance It takes a while for the oil to flow through the system and you may find that you have to add a little more to fill it to the proper level Be sure not to overfill the hub Air Conditioning System Every now and t...

Page 312: ... and a serious accident See Loading Your Vehicle in the Index CAUTION Continued CAUTION Continued D Underinflated tires pose the same danger as overloaded tires The resulting accident could cause serious injury Check all tires frequently to maintain the recommended pressure Tire pressure should be checked when your tires are cold D Overinflated tires are more likely to be cut punctured or broken b...

Page 313: ...m NOTICE Don t let anyone tell you that underinflation or overinflation is all right It s not If your tires don t have enough air underinflation you can get the following D Too much flexing D Too much heat D Tire overloading D Bad wear D Bad handling D Bad fuel economy NOTICE Continued NOTICE Continued If your tires have too much air overinflation you can get the following D Unusual wear D Bad han...

Page 314: ...re Operation When the vehicle is new check the wheel nut tightness on all wheels with a torque wrench after your first 100 miles 160 km and then 1 000 miles 1 600 km after that Whenever a wheel wheel bolt or wheel nut is removed or serviced repeat the 100 miles 160 km and then 1 000 mile 1 600 km wheel nut tightness check See Tightening the Wheel Nuts later in this section for proper torque values...

Page 315: ... tire has a bump bulge or split D The tire has a puncture cut or other damage that can t be repaired well because of the size or location of the damage CAUTION Mixing tires could cause you to lose control while driving If you mix tires of different types like radial and bias belted tires the vehicle may not handle properly and you could have a crash Be sure to use the same type of tires all around...

Page 316: ...he alignment may need to be reset If you notice your vehicle vibrating when driving on a smooth road your wheels may need to be balanced Tightening the Wheel Nuts CAUTION Wheel nuts that are not tight can work loose If all the nuts on a wheel come off the wheel can come off the vehicle causing a crash All wheel nuts must be properly tightened Follow the rules in this section to be sure they are Th...

Page 317: ...eads 1 With intermittent pilot pads position a pad at 12 o clock to center the wheel and reduce run out 2 Put the tire and rim assembly on the axle hub Install the outer rear tire and rim assembly so that its valve stem is exactly opposite the valve stem on the inner tire and rim assembly 3 Put on the wheel nuts 4 Finger tighten the nuts 5 Oil the surfaces between the nuts and washers Do not oil t...

Page 318: ... are damaged To be sure replace all studs on the wheel If the stud holes in a wheel have become larger the wheel could collapse in operation Replace any wheel if its stud holes have become larger or distorted in any way Inspect hubs and hub piloted wheels for damage Because of loose running wheels piloting pad damage may occur and require replacement of the entire hub for proper centering of the w...

Page 319: ... you can use a cloth or paper towel to do this but be sure to use a scraper or wire brush later if you need to to get all the rust or dirt off How Often to Check Wheel tightness is so important you should have a technician check nut tightness on all wheels with a torque wrench after your first 100 miles 160 km and then 1 000 miles 1 600 km after that Be sure to repeat this service whenever you hav...

Page 320: ...try to stop the leaking Get a new wheel of the proper type CAUTION Without the correct wheel you may not be able to stop properly and you could have other problems like a tire air out You could have a collision If you don t go to your dealer to get a new wheel be sure you get the correct one Each new wheel should match the original wheel in load carrying capacity inflation pressure capacity diamet...

Page 321: ...w GM original equipment wheel Appearance Care Remember cleaning products can be hazardous Some are toxic Others can burst into flame if you strike a match or get them on a hot part of the vehicle Some are dangerous if you breathe their fumes in a closed space When you use anything from a container to clean your vehicle be sure to follow the manufacturer s warnings and instructions And always open ...

Page 322: ...tructions on the cleaner label D Clean up stains as soon as you can before they set D Carefully scrape off any excess stain D Use a clean cloth or sponge and change to a clean area often A soft brush may be used if stains are stubborn D If a ring forms on fabric after spot cleaning clean the entire area immediately or it will set Using Cleaner on Fabric 1 Vacuum and brush the area to remove any lo...

Page 323: ...n with cool water and allow to dry completely 3 If a stain remains follow the cleaner instructions described earlier Cleaning Vinyl Use warm water and a clean cloth D Rub with a clean damp cloth to remove dirt You may have to do it more than once D Things like tar asphalt and shoe polish will stain if you don t get them off quickly Use a clean cloth and a vinyl leather cleaner See your dealer for ...

Page 324: ...with mild soap and lukewarm water Cleaning Glass Surfaces Glass should be cleaned often GM Glass Cleaner or a liquid household glass cleaner will remove normal tobacco smoke and dust films on interior glass See Appearance Care and Materials in the Index NOTICE Don t use abrasive cleaners on glass because they may cause scratches Avoid placing decals on the inside rear window since they may have to...

Page 325: ...During very cold damp weather more frequent application may be required See Recommended Fluids and Lubricants in the Index Cleaning the Outside of Your Vehicle The paint finish on your vehicle provides beauty depth of color gloss retention and durability Washing Your Vehicle The best way to preserve your vehicle s finish is to keep it clean by washing it often with lukewarm or cold water Don t was...

Page 326: ...d other salts ice melting agents road oil and tar tree sap bird droppings chemicals from industrial chimneys etc can damage your vehicle s finish if they remain on painted surfaces Wash the vehicle as soon as possible If necessary use non abrasive cleaners that are marked safe for painted surfaces to remove foreign matter Exterior painted surfaces are subject to aging weather and chemical fallout ...

Page 327: ... off immediately after application Don t take your vehicle through an automatic vehicle wash that has silicon carbide tire cleaning brushes These brushes can also damage the surface of these wheels Cleaning Tires To clean your tires use a stiff brush with a tire cleaner NOTICE When applying a tire dressing always take care to wipe off any overspray or splash from all painted surfaces on the body o...

Page 328: ...shop Underbody Maintenance Chemicals used for ice and snow removal and dust control can collect on the underbody If these are not removed accelerated corrosion rust can occur on the underbody parts such as fuel lines frame floor pan and exhaust system even though they have corrosion protection At least every spring flush these materials from the underbody with plain water Clean any areas where mud...

Page 329: ...6 75 GM Vehicle Care Appearance Materials ...

Page 330: ...tements is on your GVW Rating label Here is what each one means TRUCK SERVICE A vehicle made to carry property or special equipment It is made for uniform frame loading That includes using the vehicle to pull a full trailer TRUCK TRACTOR A vehicle made to draw other vehicles It s made to carry part of the load of the trailer It is made for point frame loading usually for a semi trailer fifth wheel...

Page 331: ...D a list of all production options and special equipment Be sure that this label is not removed from the vehicle Electrical System Add On Electrical Equipment NOTICE Don t add anything electrical to your vehicle unless you check with your dealer first Some electrical equipment can damage your vehicle and the damage wouldn t be covered by your warranty Some add on electrical equipment can keep othe...

Page 332: ...problem be sure to get it fixed Fusible Links A fusible link is a short piece of wire several gauge sizes smaller than the circuit it protects It will melt in an overload situation opening the circuit Your starter and other circuits have these fusible links The size is printed on the insulation If the insulation is burned beyond recognition consult your GM dealer for the proper size Replace a fusi...

Page 333: ...cts the circuit until the current load returns to normal or the problem is fixed Fuses and Circuit Breakers The wiring circuits in your vehicle are protected from short circuits by a combination of fuses circuit breakers maxi fuses and fusible links This greatly reduces the chance of a fire caused by an electrical problem There may be a fuse taped to the wiring harness near the hydraulic brake boo...

Page 334: ... instrument panel fuse blocks located behind the instrument panel on the passenger s side of the vehicle Be sure to replace fuses with fuses of the same rating Do not use fuses of higher amperage than those indicated on the fuse block Fuse Block 1 ...

Page 335: ...t Rear Trailer Wiring SPARE Spare Fuse Relay Usage BRAKE LAMP C4 C5 Brake Lamps C6 C7 C8 Tractor Trailer Wiring IGN 4 Ignition MARKER LP Sidemarker and Clearance Lamps HTD FUEL LB7 LG4 Heated Fuel AIR HTR LG4 Air Heater ECU MAINTAIN LG4 Electronic Control Unit DRL Daytime Running Lamps CHMSL ISO Center High Mounted Stop Lamp HTD MIRR Heated Mirrors R TRN TLR Right Trailer Turn Signal L TRN TLR Lef...

Page 336: ...age 7 Hazard Warning Flashers 8 Power Post 9 Courtesy Lamps 10 Warning Lights Gages and Indicators 11 Crank 12 Rear Axle 13 Trailer Turn Signals Hazard Warning Flashers 14 Radio Chime 15 Daytime Running Lamps 16 Air Bag System 17 Exterior Interior Lamps 18 Parking Brake 19 Accessory Power 20 Ignition 21 Sidemarker Lamps 22 Turn Signal Backup Lamps 23 Transmission 24 Chassis A Spare B Spare ...

Page 337: ...e located in the engine compartment on the passenger s side of the vehicle Primary Underhood Fuse Block To access the fuse blocks gently squeeze both sides of the cover to unlatch the tabs at the top Then unsnap both attachments at the bottom and remove the cover Be sure to replace fuses with fuses of the same rating Do not use fuses of higher amperage than those indicated on the fuse block ...

Page 338: ...uel IGN B Ignition STARTER Starter Relay Usage HORN Horn IGN A Ignition PTO Power Take Off REVERSE Reverse NEUTRAL START Neutral Start Fuse Usage RR DEFOG Rear Defog ENG 1 Engine 1 ENG 3 Engine 3 PCM B Powertrain Control Module BLANK Empty ENG 4 Engine 4 ENG 2 Engine 2 HTD FUEL Heated Fuel BLANK Empty BLANK Empty ...

Page 339: ...matic Pump HORN Horn NOTE 2 L18 LB7 Fuel LG4 Powertrain Control Valve LG5 Electronic Control Module BLANK Empty STUD A Spare STUD B Spare Secondary Underhood Fuse Block Fuse Usage IGN 1 Ignition 1 IGN 4 Ignition 4 IGN 3 Ignition 3 BATT HAZ Battery Hazard Warning Flashers HEADLAMP Headlamps LIGHTING Interior Exterior Lamps HVAC Comfort Control System NOTE C4 C5 Electric Brake C6 C7 C8 Brake Lamps ...

Page 340: ... replace one If you need a bulb replaced contact your dealer Capacities and Specifications Engine Specifications Engine RPO LG5 L18 LG4 LB7 Engine Type 7 2L L6 8 1L V8 7 8L L6 6 6L V8 Fuel System HEUI SPFI Common Rail Common Rail Firing Order 1 5 3 6 2 4 1 8 7 2 6 5 4 3 1 5 3 6 2 4 1 2 7 8 4 5 6 3 ...

Page 341: ...9 7 8L 200 230 hp engine with manual transmission air conditioning and increased cooling 35 3 33 4 C6 C7 C8 Models Quarts Liters 7 8L 200 215 hp engine with automatic transmission 33 7 31 9 7 2L 175 230 hp engine with manual transmission 29 3 27 7 7 2L 175 230 hp engine with manual transmission air conditioning and increased cooling 33 0 31 2 7 2L 175 210 hp engine with automatic transmission 31 4...

Page 342: ...l indicator after initial fill to make sure it is actually full Oil level may vary depending on vehicle option content Fuel Tank Capacity C4 C5 Models Gallons Liters Standard 41 155 2 Optional 40 151 4 Optional 60 227 1 Optional 80 302 8 C6 C7 C8 Models Gallons Liters Standard 50 189 2 Optional 35 132 4 Optional 50 189 2 Optional 70 264 8 Optionaln 75 283 8 Optional 100 378 5 One 25 gallon 94 6 L ...

Page 343: ... check and maintenance information Manual Transmission Pints Liters ZF S6 650 12 7 6 0 RT6609 12 5 5 9 RT8709B 25 1 11 8 FS4205A FS4205B FS4205C 11 1 5 3 FS5205A FS5205C 11 6 5 5 FS5406 18 4 8 7 FS6305A FS6305B 18 4 8 7 FS6406 18 4 8 7 FS8406 18 5 8 8 RT8908LL 29 1 13 8 Automatic Transmission Pints Liters MD 3060 P 52 0 24 6 MD 3560 P 52 0 24 6 1000 Series 16 0 8 9 2000 Series 35 0 13 5 2200 Serie...

Page 344: ...ear 31 0 14 7 Air Conditioning Refrigerant Capacity If you do your own service work you ll need the proper service manual See Doing Your Own Service Work in the Index for additional information It is recommended that service work on your air conditioning system be performed by a qualified technician Air Conditioning Refrigerant R134a 2 1 lbs 1 0 kg Use Refrigerant Oil R143a Systems Normal Maintena...

Page 345: ...14 75 lb ft 20 0 Nm Oil Filter CATR 1R0739 ACDelcoR PF454 GMPart No 94392475 ACDelcoR PF1218 Air Cleaner Donaldson P522606 ACDelcoR A1518C C4 C5 Models GMPart No 88937527 C6 C7 C8 Models GM Part No 88937548 C4 C5 Models GM Part No 88937527 C6 C7 C8 Models GM Part No 88937548 Fuel Filter ACDelcoR 915 Primary ACDelcoR GF626 GMPart No 94392474 GM Part No 97256734 ...

Page 346: ... No 15098649 Pressure Caps RC 54 GM Part No 15997145 GM Part No 15075118 GM Part No 15075118 Optional Davco K28 D350921 spin on type filter located on driver s side frame rail Optional Cold Weather KUK Racor B6484GM spin on type filter located on driver s side frame rail Optional air filter GM Part No 88937525 for C6 C7 C8 Models Fits inside standard size filter GM Part No 88937548 listed previous...

Page 347: ...Your vehicle needs these services to retain its safety dependability and emission control performance 7 2 Introduction 7 4 Part A Scheduled Maintenance Services 7 5 Scheduled Maintenance 7 21 Part B Owner Checks and Services 7 27 Part C Recommended Fluids and Lubricants 7 30 Part D Maintenance Record ...

Page 348: ...nt Improper vehicle maintenance can even affect the quality of the air we breathe Improper fluid levels or the wrong tire inflation can increase the level of emissions from your vehicle To help protect our environment and to keep your vehicle in good condition please maintain your vehicle properly Maintenance Requirements Maintenance intervals checks inspections and recommended fluids and lubrican...

Page 349: ...ools and equipment for the job If you have any doubt have a qualified technician do the work If you want to get the service information see Service and Owner Publications in the Index Part B Owner Checks and Services tells you what should be checked and when It also explains what you can easily do to help keep your vehicle in good condition Part C Recommended Fluids and Lubricants lists some recom...

Page 350: ...service needs you ll know that GM trained and supported service people will perform the work using genuine GM parts The proper fluids and lubricants to use are listed in Part C Make sure whoever services your vehicle uses these All parts should be replaced and all necessary repairs done before you or anyone else drives the vehicle This schedule is for vehicles that D carry passengers and cargo wit...

Page 351: ...aintenance Schedule further explain maintenance services See Scheduled Maintenance Supplements earlier in this section 100 Miles 160 km j Wheel stud nut service 46 1 000 Miles 1 600 km j Wheel stud nut service 46 j Rear axle air shift motor service 11 j L18 LB7 Engines Only Clutch pedal free travel service 10 7 500 Miles 12 000 km j Gasoline Engine Only Check Oil Life System If engine oil and filt...

Page 352: ...ields and underhood insulation service 4 5 21 j L18 LB7 Engines Only Clutch pedal free travel service 10 20 000 Miles 32 000 km j DURAMAXtDiesel Only Change engine oil and filter or every 12 months whichever occurs first 2 3 j Air compressor dry element pleated paper air strainer service or every 2 months or every 800 hours whichever occurs first 22 500 Miles 36 000 km j Gasoline Engine Only Check...

Page 353: ...hever occurs first lubricate linkage j Air brake chamber service or every 2 months whichever occurs first 41 j Trailer brake hand control valve service or every 3 months or every 900 hours whichever occurs first 42 j L18 LB7 Engines Only Clutch pedal free travel service 10 30 000 Miles 48 000 km j Gasoline Engine Only Check Oil Life System If engine oil and filter are changed reset system See Engi...

Page 354: ...s and tires service 15 j Parking brake service or every 6 months whichever occurs first 8 j L18 LB7 Engines Only Clutch pedal free travel service 10 40 000 Miles 64 000 km j DURAMAXtDiesel Only Change engine oil and filter or every 12 months whichever occurs first 2 3 j Air compressor dry element pleated paper air strainer service or every 2 months or every 800 hours whichever occurs first 45 000 ...

Page 355: ...curs first 4 5 24 j Evaporative Control System service if equipped or every 24 months whichever occurs first 3 26 j Air brake service or every 6 months whichever occurs first 39 j Air brake automatic slack adjuster service or every 500 hours whichever occurs first 40 j Check air brake relay valve operation and check for leaks or every month or every 300 hours whichever occurs first j Clean air bra...

Page 356: ...occurs first 1 6 j DURAMAXtDiesel Only Replace fuel filter j Chassis lubrication service or every 6 months whichever occurs first 12 j Replace fuel filter s or every 12 months whichever occurs first 3 j Inspect door hinge pins and bushings and replace as necessary j Steering system service 13 j Front and rear suspension service 14 j Spring to axle U bolts and shackle bolts service 16 j Exhaust sys...

Page 357: ...s first 8 j Rear axle air shift motor service 11 j Air intake system service or every 24 months whichever occurs first 4 5 24 j Evaporative Control System service if equipped or every 24 months whichever occurs first 3 26 j Air brake service or every 6 months whichever occurs first 39 j Air brake automatic slack adjuster service or every 500 hours whichever occurs first 40 j Check air brake relay ...

Page 358: ...ke service or every 6 months whichever occurs first 8 j Thermostatically controlled engine cooling fan service 4 20 j Shields and underhood insulation service 4 5 21 j L18 LB7 Engines Only Clutch pedal free travel service 10 80 000 Miles 128 000 km j DURAMAXt Diesel Only Change engine oil and filter or every 12 months whichever occurs first 2 3 j Air compressor dry element pleated paper air strain...

Page 359: ...rvice or every 24 months whichever occurs first and whenever hubs are removed 23 46 j Replace fuel filter s or every 12 months whichever occurs first 3 j Steering system service 13 j Front and rear suspension service 14 j Spring to axle U bolts and shackle bolts service 16 j Exhaust system service or every 6 months whichever occurs first 3 4 17 j Inspect door hinge pins and bushings and replace as...

Page 360: ...km j Gasoline Engine Only Check Oil Life System If engine oil and filter are changed reset system See Engine Oil in the Index 3 9 j Check fluid levels or every 3 months whichever occurs first 1 6 j Chassis lubrication service or every 6 months whichever occurs first 12 j Wheels and tires service 15 j Parking brake service or every 6 months whichever occurs first 8 j L18 LB7 Engines Only Clutch ped...

Page 361: ...ngine Only Inspect engine drive belt replace as necessary 200 000 Miles 320 000 km j Remove disassemble clean and inspect the air brake trailer supply valve or every 2 years or every 7 200 hours whichever occurs first j Diesel Engine Only Inspect engine drive belt replace as necessary j C400 and C500 Gasoline Engines Only Inspect drive belts replace as necessary 18 250 000 Miles 400 000 km j Wheel...

Page 362: ...ydraulic spring parking brake pump if equipped A low fluid level in the brake master cylinder can indicate worn brake linings and should be checked accordingly 7 Inspect brake lines and hoses for proper hook up binding leaks cracks chafing etc Inspect disc brake pads for wear and rotors for surface condition Inspect caliper assemblies Check brake pedal for excessive free play or travel or every 6 ...

Page 363: ... bearing if equipped bearing pads propshaft universal joints brake camshaft bracket slack adjusters pedal shaft clutch cross shaft and clutch pedal springs Lubricate suspension axle and steering linkage more often when operating under dusty or muddy conditions and in excessive off road use 13 Check steering system j Look for damaged loose or missing parts Also look for parts showing signs of wear ...

Page 364: ...t on 18 Check all gasoline engine drive belts for cracks fraying and wear Replace as needed 20 With the engine off and below normal operating temperature check to see that the thermostatically controlled engine cooling fan can be rotated by hand on viscous operated drives Replace as needed 21 Check shields and underhood insulation for damage or looseness Adjust or replace as needed 23 Wheel bearin...

Page 365: ... EGR system as described in the service manual See Service and Owner Publications in the Index 32 Inspect Electronic Vacuum Regulator Valve EVRV filter for excessive contamination or plugging If needed clean filter with solution of soap and water let dry and install 35 Drain flush and refill cooling system See Recommended Fluids and Lubricants in the Index for what to use Inspect hoses Clean radia...

Page 366: ...on of the rear brake diaphragms are non serviceable j Replace the air compressor filter element mounted on the air compressor For remote air compressor intake service refer to engine air cleaner filter replacement j Remove disassemble clean and inspect the safety valve standard brake chamber quick release valve quick release double check valve combination parking brake control valve double check v...

Page 367: ... Each Fuel Fill It is important for you or a service station attendant to perform these underhood checks at each fuel fill Engine Oil Level Check Check the engine oil level and add the proper oil if necessary See Engine Oil in the Index for further details Engine Coolant Level Check Check the engine coolant level and add DEX COOLR coolant mixture if necessary See Engine Coolant in the Index for fu...

Page 368: ...ning in the Index Engine Air Cleaner Filter Restriction Indicator Check Your vehicle has an indicator located on the air cleaner in the engine compartment that lets you know when the air cleaner filter is dirty and needs to be changed Check indicator at least twice a year or when your engine oil is changed whichever occurs first See Engine Air Cleaner in the Index for more information Inspect your...

Page 369: ...le with the parking brake only This checks holding ability Starter Switch Check CAUTION When you are doing this check the vehicle could move suddenly If it does you or others could be injured Follow the steps below 1 Before you start be sure you have enough room around the vehicle 2 Firmly apply both the parking brake and the regular brakes See Parking Brake in the Index if necessary Do not use th...

Page 370: ...essure and check system for leaks Any of these conditions could indicate the need for brake system inspection and or service Engine Cooling System Service Inspect the hoses and have them replaced if they are cracked swollen or deteriorated Inspect all pipes fittings and clamps replace as needed Clean the outside of the radiator and air conditioning condenser To help ensure proper operation a press...

Page 371: ...mps identification and clearance lamps taillamps brake lamps turn signals backup lamps and hazard warning flashers Have headlamp aim checked at once if beams seem improperly aimed Glass Mirrors Lamps and or Reflectors Condition Check Look for broken scratched dirty or damaged glass mirrors lamps or reflectors that could reduce the view or visibility or cause injury Replace clean or repair promptly...

Page 372: ...re mud and other debris can collect Sediment packed in closed areas of the frame should be loosened before being flushed Engine Cover Check Check that the cab s engine cover and seal if equipped are not torn or damaged Be sure that the cover is clamped down firmly to the floor At Least Once a Year Key Lock Cylinders Service Lubricate the key lock cylinders with the lubricant specified in Part C Un...

Page 373: ...el Engine See the CaterpillarR Operation Maintenance Manual for engine oil recommendations USAGE FLUID LUBRICANT Engine Coolant Gasoline Engine DURAMAXt Diesel 50 50 mixture of clean drinkable water and use only DEX COOLR Coolant See Engine Coolant in the Index Engine Coolant Caterpillar Diesel Engine See the CaterpillarR Operation Maintenance Manual for engine coolant recommendations Hydraulic Br...

Page 374: ...ission ZF 6 Speed TranSyndtSynthetic Transmission Fluid GM Part No U S 12378515 in Canada 88900701 USAGE FLUID LUBRICANT Automatic Transmission See the Allison Transmission Operator s Manual for correct transmission fluid Chassis Lubrication Chassis Lubricant GM Part No U S 12377985 in Canada 88901242 or equivalent or lubricant meeting requirements of NLGI 2 Category LB or GC LB Front Wheel Bearin...

Page 375: ...gerant Oil GM Part No U S 5416939 in Canada 10953496 USAGE FLUID LUBRICANT Propshafts and Splines Wheel bearing lubricant meeting requirements of NLGI 2 Category GC or GC LB GM Part No U S 1051344 in Canada 993037 or equivalent Cab Door Latches Multi Purpose Lubricant SuperlubeR GM Part No U S 12346241 in Canada 10953474 or equivalent Weatherstrip Conditioning Dielectric Silicone Grease GM Part No...

Page 376: ...he maintenance record charts provided here Any additional information from Owner Checks and Services can be added on the following record pages Also you should retain all maintenance receipts Your owner information portfolio is a convenient place to store them Maintenance Record DATE ODOMETER READING SERVICED BY MAINTENANCE PERFORMED ...

Page 377: ...7 31 Maintenance Record DATE ODOMETER READING SERVICED BY MAINTENANCE PERFORMED ...

Page 378: ...7 32 Maintenance Record DATE ODOMETER READING SERVICED BY MAINTENANCE PERFORMED ...

Page 379: ...7 33 Maintenance Record DATE ODOMETER READING SERVICED BY MAINTENANCE PERFORMED ...

Page 380: ...7 34 Maintenance Record DATE ODOMETER READING SERVICED BY MAINTENANCE PERFORMED ...

Page 381: ...ublications and how to report any safety defects 8 2 Customer Satisfaction Procedure 8 2 Customer Assistance for Text Telephone TTY Users 8 3 Customer Assistance Offices 8 4 Roadside Assistance Program 8 4 Reporting Safety Defects to the United States Government 8 5 Reporting Safety Defects to the Canadian Government 8 5 Reporting Safety Defects to General Motors ...

Page 382: ...00 862 4389 Customer Assistance prompt In Canada contact GM of Canada Customer Communication Centre in Oshawa by calling 1 800 263 3777 English or 1 800 263 7854 French We encourage you to call the toll free number in order to give your inquiry prompt attention Please have the following information available to give the Customer Assistance Representative D Vehicle Identification Number This is ava...

Page 383: ...Spanish U S Virgin Islands 1 800 496 9994 Fax Number 313 381 0022 Canada General Motors of Canada Limited Customer Communication Centre 163 005 1908 Colonel Sam Drive Oshawa Ontario L1H 8P7 1 800 263 3777 English 1 800 263 7854 French 1 800 263 3830 For Text Telephone devices TTYs Roadside Assistance 1 800 268 6800 All Overseas Locations Please contact the local General Motors Business Unit Mexico...

Page 384: ...ncluding weekends and holidays Should you have any questions about Roadside Assistance call the GMC Roadside Assistance Center or contact your dealer Reporting Safety Defects to the United States Government If you believe that your vehicle has a defect which could cause a crash or could cause injury or death you should immediately inform the National Highway Traffic Safety Administration NHTSA in ...

Page 385: ...Ottawa Ontario K1A 0N5 Reporting Safety Defects to General Motors In addition to notifying NHTSA or Transport Canada in a situation like this we certainly hope you ll notify us Please call us at 1 800 862 4389 or write GM Medium Duty Truck Customer Assistance Center P O Box 44947 Detroit MI 48244 In Canada please call us at 1 800 263 3777 English or 1 800 263 7854 French Or write General Motors of...

Page 386: ...tional information about the vehicle The owner s manual will include the Maintenance Schedule for all models In Portfolio Includes a Portfolio Owner s Manual and Warranty Booklet RETAIL SELL PRICE 35 00 Without Portfolio Owner s Manual only RETAIL SELL PRICE 25 00 Current and Past Model Order Forms Service Publications are available for current and past model GM vehicles To request an order form p...

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