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GMC T-Series 2007, Owner'S Manual, Page: 26 / 356

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GMC T-Series 2007 Owner'S Manual Download Page 26

Air Suspension Seats

Your vehicle may have an air suspension seat.
There are two ways you can adjust the seat.

Height Adjustment

The height adjustment
is controlled by the air
suspension valve. The
lever for the valve is
located on the outboard
side of the driver’s seat.

Pull the lever up to raise the seat. Push the lever
down to lower the seat.

Isolator Lock Lever

The lever is located on
the inboard side of the
driver’s seat.

Move the handle down to lock the seat in place.
This is used to reduce backslap experienced while
in tractor/trailer operation or while operating a
dump truck.

Lever shown in the

Locked Position

26

Summary of Contents for T-Series 2007

Page 1: ...e Controls 114 Warning Lights Gages and Indicators 118 Audio System s 137 Driving Your Vehicle 147 Your Driving the Road and Your Vehicle 148 Towing 182 Service and Appearance Care 189 Service 191 Fue...

Page 2: ...Maintenance Replacement Parts 288 Maintenance Schedule 291 Maintenance Schedule 292 Customer Assistance Information 327 Customer Assistance and Information 328 Reporting Safety Defects 336 Vehicle Da...

Page 3: ...hout a front passenger or rear seats Keep this manual in the vehicle so it will be there if it is needed while you are on the road If the vehicle is sold leave this manual in the vehicle Canadian Owne...

Page 4: ...or Federal Emissions Control System Warranty Coverage If the emissions control label contains language stating the vehicle conforms to California regulations the vehicle is also eligible for Californi...

Page 5: ...If an EPA approved I M program is enforced in your area you may also be eligible for Emission Performance Warranty coverage when all of the following three conditions are met The chassis has been main...

Page 6: ...k adopted California emission standards but not the California emissions warranty The Federal Emissions Control System warranty applies to all vehicles in New York Your Rights and Obligations For Chas...

Page 7: ...hort term Emission Defects Warranty For 7 years or 70 000 miles whichever comes first vehicles with a GVWR of 14 000 lbs or less If an emission related part listed in this booklet specially noted with...

Page 8: ...ssistance Center at 1 800 222 1020 or in California write to State of California Air Resources Board Mobile Source Operations Division P O Box 8001 El Monte CA 91731 2990 Emission Warranty Parts List...

Page 9: ...il Pressure Sensor DOD Oil Pressure Sensor 7 8L Isuzu Diesel Oxygen Sensors Powertrain Control Module PCM Programmable Read Only Memory PROM Throttle Position Sensor Throttle Position Switch Vehicle C...

Page 10: ...l Rail Assembly Fuel Rail Pressure Sensor 6 6L DURAMAX Diesel Fuel Rail Pressure Sensor 7 8L Isuzu Diesel Air Management System Air Cleaner Air Cleaner Diaphragm Isuzu Motor Air Cleaner Resonator Air...

Page 11: ...L DURAMAX Diesel Turbocharger Boost Sensor 7 8L Isuzu Diesel Turbocharger Oil Separator Turbocharger Thermo Purge Switch Vacuum Pump 6 6L DURAMAX Diesel Ignition System Camshaft Position Sensor s Cran...

Page 12: ...nverters and exhaust manifold Exhaust Pipes and or Mufflers when located between catalytic converters and exhaust manifold 7 8L Isuzu Diesel Exhaust Throttle 7 8L Isuzu Diesel Positive Crankcase Venti...

Page 13: ...rid Auxiliary Transmission Pump Relay and Circuit Battery Pack Current Sensor and Circuit Battery Pack 12V Modules 3 Brake Pedal Switch PCM ZAB Switch Energy Storage Control Module IsuzuLAN CAN Commun...

Page 14: ...federal and California emission requirements Accordingly it is recommended that any replacement parts used for maintenance or for the repair of emission control systems be new genuine GM parts The war...

Page 15: ...n 10 days or a repair not being completed within 30 days constitutes an emergency Retain receipts and failed parts in order to receive compensation for warranty repairs reimbursable due to an emergenc...

Page 16: ...period required by local or state law The only exceptions would be if you request or agree to an extension or if a delay results from events beyond the control of your dealer or GM If you are not so n...

Page 17: ...and the page number where it can be found Safety Warnings and Symbols There are a number of safety cautions in this book A box with the word CAUTION is used to tell about things that could hurt you or...

Page 18: ...labels on the vehicle which use the same words CAUTION or NOTICE Vehicle Symbols The vehicle has components and labels that use symbols instead of text Symbols are shown along with the text describin...

Page 19: ...These are some examples of symbols that may be found on the vehicle 19...

Page 20: ...NOTES 20...

Page 21: ...Adjustment 40 Safety Belt Use During Pregnancy 41 Right Passenger Position 41 Center Passenger Position 42 Safety Belt Extender 43 Child Restraints 43 Older Children 43 Infants and Young Children 46...

Page 22: ...ated at the front of the seat CAUTION You can lose control of the vehicle if you try to adjust a manual driver s seat while the vehicle is moving The sudden movement could startle and confuse you or m...

Page 23: ...cked into place To adjust the lower seat cushion forward or backward pull up on lever B and slide the cushion to where you want it Then release the lever Manual Lumbar To get more support in the lumba...

Page 24: ...r s seat while the vehicle is moving The sudden movement could startle and confuse you or make you push a pedal when you do not want to Adjust the driver s seat only when the vehicle is not moving To...

Page 25: ...go into it receiving neck or other injuries The lap belt cannot 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...

Page 26: ...alve is located on the outboard side of the driver s seat Pull the lever up to raise the seat Push the lever down to lower the seat Isolator Lock Lever The lever is located on the inboard side of the...

Page 27: ...ompartment is located on the rear of the seatback for use when the seatback is in the fully lowered position Push the lever on the right side of the seat and pull on the seatback when you are ready to...

Page 28: ...d or killed In the same crash you might not be if you are buckled up Always fasten your safety belt and check that your passengers belts are fastened properly too CAUTION It is extremely dangerous to...

Page 29: ...rvive But most crashes are in between In many of them people who buckle up can survive and sometimes walk away Without belts they could have been badly hurt or killed After more than 40 years of safet...

Page 30: ...If the vehicle hits something it stops right then But nothing stops the people They keep moving Then something will stop them It could be the windshield 30...

Page 31: ...were to give that big vehicle a chance to deal with the force of the impact instead of you With safety belts you slow down as the vehicle does You get more time to stop You stop over more distance an...

Page 32: ...ngers can be hurt Being a good driver does not protect you from things beyond your control such as bad drivers Most accidents occur within 25 miles 40 km of home And the greatest number of serious inj...

Page 33: ...p portion of the lap shoulder belt Make sure this clip is not too close to the latch plate when you wear your safety belt so you can make the belt snug 4 Push the latch plate into the buckle until it...

Page 34: ...ips just touching the thighs In a crash this applies force to the strong pelvic bones And you would be less likely to slide under the lap belt If you slid under it the belt would apply force at your a...

Page 35: ...oo loose It will not 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...

Page 36: ...otection this way CAUTION You can be seriously hurt if your lap belt is too loose In a crash you could slide under the lap belt and apply force at your abdomen This could cause serious or even fatal i...

Page 37: ...an 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 s...

Page 38: ...eriously 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...

Page 39: ...oss the body CAUTION You can be seriously injured by a twisted belt In a crash you would not have the full width of the belt to spread impact forces If a belt is twisted make it straight so it can wor...

Page 40: ...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 Improper shoulder belt height adjustment could red...

Page 41: ...worn as low as possible below the rounding throughout the pregnancy The best way to protect the fetus is to protect the mother When a safety belt is worn properly it is more likely that the fetus wil...

Page 42: ...longer tilt the latch plate and pull it along the belt To make the belt shorter pull its free end as shown until the belt is snug Buckle position and release it the same way as the lap part of a lap...

Page 43: ...use it and use it only for the seat it is made to fit The extender has been designed for adults Never use it for securing child seats To wear it attach it to the regular safety belt For more informati...

Page 44: ...nternal injuries in a crash According to accident statistics children are safer when properly restrained in the rear seating positions than in the front seating positions In a crash children who are n...

Page 45: ...ld s face or neck you might want to place the child in a seat that has a lap belt if your vehicle has one CAUTION Never do this Here a child is sitting in a seat that has a lap shoulder belt but the s...

Page 46: ...t be restrained while in a vehicle CAUTION Children can be seriously injured or strangled if a shoulder belt is wrapped around their neck and the safety belt continues to tighten Never leave children...

Page 47: ...oes not 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 l...

Page 48: ...t 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 par...

Page 49: ...so small that the vehicle s regular safety belt may not remain low on the hip bones as it should Instead it may settle up around the child s abdomen In a crash the belt would apply force on a body are...

Page 50: ...or position a child on a continuous flat surface Make sure that the infant s head rests toward the center of the vehicle A rear facing infant seat B provides restraint with the seating surface agains...

Page 51: ...ces such as T shaped or shelf like shields A booster seat F G is a child restraint designed to improve the fit of the vehicle s safety belt system Some booster seats have a shoulder belt positioner an...

Page 52: ...eets federal motor vehicle safety standards Then follow the instructions for the restraint You may find these instructions on the restraint itself or in a booklet or both Securing an Add on Child Rest...

Page 53: ...traps that come down over each of the infant s shoulders and buckle together at the crotch The five point harness system has two shoulder straps two hip straps and a crotch strap A shield may take the...

Page 54: ...be anchored A national or local law may require that the top tether be anchored In Canada the law requires that forward facing child restraints have a top tether and that the tether be attached Your v...

Page 55: ...You will be using the lap belt Be sure to follow the instructions that came with the child restraint Secure the child in the child restraint when and as the instructions say But do not use this posit...

Page 56: ...restraint just unbuckle the vehicle s safety belt It will be ready to work for an adult or larger child passenger Restraint System Check Checking the Restraint Systems Now and then make sure the safet...

Page 57: ...inspected and any necessary replacements made as soon as possible If you have had a crash do you need new belts After a very minor collision nothing may be necessary But if the belts were stretched a...

Page 58: ...NOTES 58...

Page 59: ...Rear Axle Electric Shift Control 75 Automatic Transmission Operation 76 Automatic Transmission Third Gear Hold 77 Manual Transmission Operation 77 Power Take Off PTO 79 Parking 80 Parking Brake With...

Page 60: ...riously injured or killed if caught in the path of a closing window Do not leave the keys in a vehicle with children The key can be used for the ignition switch and all locks The key has a code on it...

Page 61: ...ive Young children who get into unlocked vehicles may be unable to get out A child can be overcome by extreme heat and can suffer permanent injuries or even death from heat stroke Always lock your veh...

Page 62: ...ON Leaving children helpless adults or pets in a vehicle with the windows closed is dangerous They can be overcome by the extreme heat and suffer permanent injuries or even death from heat stroke Neve...

Page 63: ...te when the ignition is in ACC or ON Power Window Lock Switch Pressing the power window lock switch once locks the passenger side window and prevents it from opening or closing Pressing the switch a s...

Page 64: ...aned CAUTION Never open the passenger side door glass with the ignition on You can be injured if the window linkage moves Open this glass only with the ignition off To open the window cover pull on th...

Page 65: ...linings are not 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 Use the lowest gear you...

Page 66: ...ieves If you leave the key in the ignition and park your vehicle a chime will sound when you open the driver s door Always remember to remove your key from the ignition and take it with you This will...

Page 67: ...hicle serviced right away 3 If the engine does not start after 15 seconds of cranking turn the ignition key to LOCK Wait one minute for the starter to cool then try the same steps again When your engi...

Page 68: ...en the engine is cold your vehicle needs service If your batteries do not have enough charge to start your engine see Battery on page 235 for more information Be sure you have the right oil for your e...

Page 69: ...he system senses there is low engine coolant the alarm and the low coolant warning light comes on See Low Coolant Warning Light on page 129 for more information The alarm means that your engine will s...

Page 70: ...ature is activated by pressing the button on the instrument panel When the button is pressed again or any of the previous conditions are not met manual high idle will be deactivated Exhaust Restrictor...

Page 71: ...al 10 seconds the engine idle will increase The exhaust restrictor will shut off and engine idle will return to normal once the engine is warmed up or the brake pedal is pressed Engine Checks Before O...

Page 72: ...essure Gage on page 136 for more information The charging system light should come on when the ignition key is turned to ON or START and should go out when the engine is running above idle If the ligh...

Page 73: ...e 2 Find the cord on the drivers side in the engine compartment 3 Plug it into a normal grounded 110 volt AC outlet CAUTION Plugging the cord into an ungrounded outlet could cause an electrical shock...

Page 74: ...switch that will come on when the exhaust brake is active See Exhaust Brake Indicator Light on page 133 for more information When using the exhaust brake the proper gear range selection is important T...

Page 75: ...d or under a heavy load shift into low range while the vehicle is standing still and then operate the transmission normally On the highway with the rear axle in low range and the transmission in top g...

Page 76: ...the parking brake firmly set Your vehicle can roll If you have left the engine running the vehicle can move suddenly You or others could be injured To be sure your vehicle will not move even when you...

Page 77: ...engine governed speed is exceeded such as when going downhill This feature is used for certain load and traffic conditions or when plowing snow See the Allison Transmission Operator s Manual in your...

Page 78: ...utching later in this section Eaton Fuller Nine and Ten Speed Non Synchronized Manual Transmissions If your vehicle has one of these non synchronized transmissions it is naturally somewhat complicated...

Page 79: ...dling Press the clutch pedal all the way down to the floorboard to apply the clutch brake When using the clutch brake disengage the clutch pedal and shift the transmission into either the initial star...

Page 80: ...ed To be sure your vehicle will not move even when you are on level ground follow the steps below Parking a Vehicle With the Two Speed Rear Axle 1 With the engine running shift the two speed rear axle...

Page 81: ...ke System Warning Light on page 124 for more information Then shift the transmission to NEUTRAL for a manual transmission or PARK P for an automatic transmission The vehicle must be stationary when ap...

Page 82: ...iving with the parking brake on can overheat the brake system and cause premature wear or damage to brake system parts Verify that the parking brake is fully released and the brake warning light is of...

Page 83: ...r s air brake system do the following 1 Move your vehicle into the proper position 2 Apply the parking brake by pulling the yellow parking brake knob out 3 Hook up the trailer air system properly 4 Ge...

Page 84: ...p If the air pressure drops below 60 to 70 psi 413 to 482 kPa the primary brake light and warning buzzer will come on If the air pressure drops to 35 to 45 psi 241 to 310 kPa the red trailer air suppl...

Page 85: ...4 km Notice Driving with the parking brake on can damage the transmission and brake system parts Verify that the parking brake is fully released and the brake warning light is off before driving Air...

Page 86: ...never the switch is in the dumped position Parking Over Things That Burn CAUTION Things that can burn could touch hot exhaust parts under your vehicle and ignite Do not park over papers leaves dry gra...

Page 87: ...el Particulate Filter Your vehicle has a Diesel Particulate Filter DPF as part of the exhaust system to reduce vehicle emissions The DPF requires a unique exhaust tailpipe with an exhaust cooler The e...

Page 88: ...e would not be covered by your warranty Your DPF equipped vehicle has specific fuel and engine oil requirements See What Fuel to Use on page 195 and Engine Oil on page 206 to make sure you use the req...

Page 89: ...l and needs regeneration If the light message comes on stop the idling and drive the vehicle as described previously to clean the filter Continued idling with the warning light message on could cause...

Page 90: ...egeneration is not completed as indicated by the green DPF indicator going off in a single operation automatic regeneration might not be allowed until the vehicle is stopped and manual regeneration is...

Page 91: ...on is normally completed in about 30 minutes Under certain operating conditions manual regeneration might not be able to be performed even if the soot level in the DPF requires regeneration This can o...

Page 92: ...a garage with the engine running Another closed in place can be a blizzard See Winter Driving on page 174 CAUTION It can be dangerous to get out of your vehicle if the automatic transmission shift lev...

Page 93: ...lamps are on Outside Convex Mirrors CAUTION A convex mirror can make things like other vehicles look farther away than they really are If you cut too sharply into the right or left lane you could hit...

Page 94: ...light will come on and stay on whenever the outside heated rearview mirrors are activated Storage Areas Overhead Storage An overhead storage compartment is provided above each of the driver s and pass...

Page 95: ...the compartment you must first pull down on the handle located on the passenger side to fold the seat all the way forward To open squeeze both sides of the latch Center Console Storage Area There are...

Page 96: ...NOTES 96...

Page 97: ...13 Ashtray s and Cigarette Lighter 114 Climate Controls 114 Climate Control System 114 Outlet Adjustment 116 Passenger Compartment Air Filter 116 Warning Lights Gages and Indicators 118 Instrument Pan...

Page 98: ...ht 133 Differential Lock Indicator Light 133 Reduced Engine Power Light 133 Highbeam On Light 134 Daytime Running Lamps DRL Indicator Light 134 Check Gages Warning Light 134 Fuel Gage 135 Water in Fue...

Page 99: ...NOTES 99...

Page 100: ...Instrument Panel Overview 100...

Page 101: ...High Idle System under Starting the Diesel Engine on page 66 Power Take Off PTO If Equipped See Power Take Off PTO on page 79 K Front Panel Release See Lifting the Front Panel on page 247 L Tilt Stee...

Page 102: ...hazard flashers Move the lever down again to turn the flashers off The hazard warning flashers will work with or without the key in the ignition When the hazard warning flashers are on the turn signa...

Page 103: ...y down Turn Signal Multifunction Lever The multifunction lever located on the left side of the steering column includes the following G Turn and Lane Change Signals See Turn and Lane Change Signals on...

Page 104: ...If you signal a turn or a lane change and the arrows on the instrument panel turn on but do not flash check the turn signal flasher and circuit breaker If a bulb is burned out replace it to help avoi...

Page 105: ...you The high beam indicator on the instrument panel cluster will come on Release the lever to return to normal operation Windshield Wipers The windshield wipers are controlled by the lever located on...

Page 106: ...ad your wipers The windshield wiper motor is protected from overload by a circuit breaker and a fuse If the motor overheats due to heavy snow or ice the wiper will stop until the motor cools Although...

Page 107: ...c transmission and the brakes are applied the cruise control will shut off If the vehicle has a manual transmission and the brakes are applied or the clutch pedal is pushed the cruise control will shu...

Page 108: ...ION If you leave your cruise control on when you are not using cruise you might hit a button and go into cruise when you do not want to You could be startled and even lose control Keep the cruise cont...

Page 109: ...edal You will now cruise at the higher speed Move the band on the multifunction lever from on to the RES position Hold it there until the vehicle reaches the speed desired and then release the band To...

Page 110: ...al and automatic transmissions Press the clutch pedal to the floor manual transmissions Turn off cruise control by pressing the J button again Shift the transmission to NEUTRAL Erasing Speed Memory Wh...

Page 111: ...different driving conditions but they can be especially helpful in the short periods after dawn and before sunset Fully functional daytime running lamps are required on all vehicles first sold in Cana...

Page 112: ...in to turn them off The headlamp band will not operate these lamps Instrument Panel Brightness If your vehicle has this feature the knob is located on the lower right of the instrument panel Turn the...

Page 113: ...vehicle to learn more about this switch or see your dealer for more information Auxiliary Power Jacks If your vehicle has these power jacks they are on the console to the right of the driver s seat T...

Page 114: ...all the way and let it go When it s ready it will pop back out by itself Notice Holding a cigarette lighter in while it is heating does not let the lighter back away from the heating element when it...

Page 115: ...keep outside air odors and dust from entering your vehicle Recirculation is not available in Defog or Defrost modes A C Air Conditioning If your vehicle has this feature you can use your air conditio...

Page 116: ...tem will automatically turn off recirculation and run the air conditioning compressor unless the outside temperature is at or below freezing Recirculation cannot be selected while in the defrost mode...

Page 117: ...the latch inside the cab on the driver s side of the vehicle to open the front panel To inspect and clean the passenger compartment air filter use the following steps 1 Pull the tab located at the bo...

Page 118: ...ts come on briefly when you start the engine just to let you know they are working If you are familiar with this section you should not be alarmed when this happens Gages can indicate when there may b...

Page 119: ...instrument panel cluster is designed to let you know at a glance how your vehicle is running You will know how fast you are going about how much fuel is left and many other things you will need to dri...

Page 120: ...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...

Page 121: ...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 dealer for assistance with programming your engine lim...

Page 122: ...d other accessories Sustained driving with a generator failure could result in a lack of back up braking if the engine quits or the power steering pump should fail Voltmeter Gage When your engine is r...

Page 123: ...ay lose forward gears The computer for the 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 wh...

Page 124: ...mitations see the Allison Automatic 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 di...

Page 125: ...o not come on then have them fixed so they will be ready to warn you if there is a problem If one or both of these warning lights stay on after you start the engine there could be a brake problem Have...

Page 126: ...10 kPa When the warning light comes on while you are driving you should drive only as far as the nearest point of safety and then stop the vehicle CAUTION If the air brake system warning light comes o...

Page 127: ...ot have antilock brakes and there is a problem with your regular brakes See Brake System Warning Light on page 124 and Antilock Brake System ABS on page 154 for more information Trailer Antilock Brake...

Page 128: ...y The light will stay on for a few seconds after the system stops limiting wheel spin Engine Coolant Temperature Gage This gage shows the engine coolant temperature If the gage pointer moves into the...

Page 129: ...erviced 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 Wait to Start Indicator This indicator in the...

Page 130: ...come on at all have it repaired Notice If you keep driving your vehicle with this light on after a while the emission controls might not work as well your vehicle s fuel economy might not be as good...

Page 131: ...ould not be covered by your warranty Always follow the maintenance schedule in this manual for changing engine oil Low Oil Level Light This light comes on briefly when the engine is started This norma...

Page 132: ...for Isuzu 6H diesel engines see Engine Oil on page 206 To reset the change engine oil light see Engine Oil on page 206 Engine Overspeed Warning Light If your vehicle has this light it will come on if...

Page 133: ...during starting If the light fails to come on have it repaired as soon as possible so you will be aware when the lock system is in use Reduced Engine Power Light If the check engine and reduced engine...

Page 134: ...r information When it begins to get dark the DRL indicator light is a reminder to turn on your headlamps Check Gages Warning Light This light will come on as you re starting the engine just as a check...

Page 135: ...are four concerns of some operators None of these shows a problem with your fuel gage The gage moves a little when you turn a corner or speed up The gage doesn t go back to empty when you turn off th...

Page 136: ...d See Diesel Particulate Filter on page 87 and Reduced Engine Power Light on page 133 for more information Air Pressure Gage If your vehicle has air brakes this gage shows the air pressure for both yo...

Page 137: ...isconnected The hourmeter resets to 0 0 when 10 000 hours are accumulated The instrument panel cluster begins to reaccumulate the engine run time hours from 0 0 hours Audio System s Determine which ra...

Page 138: ...t can be added it is very important to do it properly Added sound equipment may interfere with the operation of your vehicle s engine radio or other systems and even damage them Your vehicle s systems...

Page 139: ...zy Tune Press the down z arrow to go to the previous radio frequency Press the up y arrow to go to the next radio frequency To seek stations press and hold either the down z or up y arrow for a secon...

Page 140: ...s 2 through 4 for each pushbutton To automatically store the preset pushbuttons perform the following steps 1 Turn the radio on 2 Press BND to select FM or AM 3 Press and hold the AS button for more t...

Page 141: ...g the alarm the display changes back to the current time 5 Press the alarm button again The alarm symbol displays The alarm sounds at the same time every day 6 To turn the alarm off press the alarm bu...

Page 142: ...dio frequency To seek stations press and hold either the down z or up y arrow for a second or longer The radio seeks to the next or previous station The radio only seeks stations with a strong signal...

Page 143: ...teps for each pushbutton Setting the Tone Bass Treble TONE To adjust the bass turn the control ring behind the power volume knob counterclockwise To adjust the treble turn the control ring behind the...

Page 144: ...apes that are up to 30 to 45 minutes long on each side Tapes longer than that are so thin they may not work well in this player The longer side with the tape visible should face to the right If you he...

Page 145: ...venience accessories and external electronic devices are plugged into the accessory power outlet If there is interference or static unplug the item from the accessory power outlet AM The range for mos...

Page 146: ...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 A non scrubbing action wet type cleaner which...

Page 147: ...ontrol System TCS 157 Steering 159 Off Road Recovery 161 Passing 161 Loss of Control 163 Driving at Night 165 Driving in Rain and on Wet Roads 166 City Driving 169 Freeway Driving 170 Highway Hypnosis...

Page 148: ...pedestrians or other drivers are going to be careless and make mistakes Anticipate what they might do and be ready Rear end collisions are about the most preventable of accidents Yet they are common A...

Page 149: ...tes nearly half the adult population choose never to drink alcohol so they never drive after drinking For persons under 21 it is against the law in every U S state to drink alcohol There are good medi...

Page 150: ...drinking will have a somewhat lower BAC level There is a gender difference too Women generally have a lower relative percentage of body water than men Since alcohol is carried in body water this means...

Page 151: ...answer What if there is an emergency a need to take sudden action as when a child darts into the street A person with even a moderate BAC might not be able to react quickly enough to avoid the collis...

Page 152: ...bout three fourths of a second But that is 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 e...

Page 153: ...ower assist is used up it can take longer to stop and the brake pedal will be harder to push Hydraulic Brake Systems If the engine stops running or if the primary brake system stops working your vehic...

Page 154: ...his test is going on This is normal If there is a problem with ABS this warning light will stay on See Antilock Brake System Warning Light on page 127 Let us say the road is wet and you are driving sa...

Page 155: ...s not change the time you need to get your foot up to the brake pedal or always decrease stopping distance If you get too close to the vehicle in front of you you will not have time to apply the brake...

Page 156: ...kes You can apply the trailer brakes a little or apply them all the way if you have to Use this control only when you are driving Do not use it for parking or to hold the rig on a hill CAUTION Using t...

Page 157: ...inter axle differential lock while the rear wheels are spinning freely as they might on snow or ice can damage the axle s Turn on this control only while the wheels are not spinning freely Traction Co...

Page 158: ...The traction control system automatically comes on whenever you start your vehicle To limit wheel spin especially in slippery road conditions you should always leave the system on But you can turn th...

Page 159: ...ehicle going in the same direction If you have ever tried to steer a vehicle on wet ice you will understand this The traction you can get in a curve depends on the condition of the tires and the road...

Page 160: ...But sometimes you cannot there is not room That is the time for evasive action steering around the problem Your vehicle can perform very well in emergencies like these First apply the brakes See Braki...

Page 161: ...edge Then turn your steering wheel to go straight down the roadway Passing The driver of a vehicle about to pass another on a two lane highway waits for just the right moment accelerates moves around...

Page 162: ...o not get too close to the vehicle you want to pass while you are awaiting an opportunity For one thing following too closely reduces your area of vision especially if you are following a larger vehic...

Page 163: ...ead of you Perhaps you can ease a little to the right Loss of Control Let us review what driving experts say about what happens when the three control systems brakes steering and acceleration do not h...

Page 164: ...ed While driving on a surface with reduced traction try your best to avoid sudden steering acceleration or braking including reducing vehicle speed by shifting to a lower gear Any sudden changes could...

Page 165: ...in the daytime But as we get older these differences increase A 50 year old driver might require at least twice as much light to see the same thing at night as a 20 year old What you do in the daytim...

Page 166: ...n a turn or curve Keep your eyes moving that way it is easier to pick out dimly lighted objects Just as the headlamps should be checked regularly for proper aim so should your eyes be examined regular...

Page 167: ...d reservoir filled with washer fluid Replace your windshield wiper inserts when they show signs of streaking or missing areas on the windshield or when strips of rubber start to separate from the inse...

Page 168: ...rule about hydroplaning The best advice is to slow down when it is raining Driving Through Deep Standing Water Notice If you drive too quickly through deep puddles or standing water water can come in...

Page 169: ...following distance And be especially careful when you pass another vehicle Allow yourself more clear room ahead and be prepared to have your view restricted by road spray Have good tires with proper t...

Page 170: ...for the signs Try to use the freeways that rim and crisscross most large cities You will save time and energy See Freeway Driving on page 170 Treat a green light as a warning signal A traffic light i...

Page 171: ...ed limit or to the prevailing rate if it is slower Stay in the right lane unless you want to pass On some freeways larger vehicles are not allowed to use some lanes These places usually are well marke...

Page 172: ...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 Make sure...

Page 173: ...gerous The brakes will have to do all the work of slowing down They could get so hot that they would not work well You would then have poor braking or even none going down a hill You could crash Alway...

Page 174: ...er 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...

Page 175: ...to the road conditions Under certain conditions you might want to turn the TCS off such as when driving through deep snow and loose gravel to help maintain vehicle motion at lower speeds See Traction...

Page 176: ...e a patch of ice ahead of you brake before you are on it Try not to brake while you are actually on the ice and avoid sudden steering maneuvers If You Are Caught in a Blizzard If you are stopped by he...

Page 177: ...nd the base of your vehicle if any is blocking your exhaust pipe And check around again from time to time to be sure snow does not collect there Open a window just a little on the side of the vehicle...

Page 178: ...r to free your vehicle when it is stuck you will need to spin the wheels but you do not want to spin the wheels too fast The method known as rocking can help you get out when you are stuck but you mus...

Page 179: ...ou will cause a rocking motion that could free your vehicle If that does not get your vehicle out after a few tries it might need to be towed out If your vehicle does need to be towed out see Towing Y...

Page 180: ...the maximum weight for the front and rear axles called the Gross Axle Weight Rating GAWR To find out the actual loads on your front and rear axles go to a weigh station and weigh your vehicle Your dea...

Page 181: ...as the vehicle goes If you have to stop or turn quickly or if there is a crash they keep going CAUTION Things you put inside your vehicle can strike and injure people in a sudden stop or turn or in a...

Page 182: ...e springs can lead to injury Never work on the air brakes chambers without first using the release studs to compress the brake springs When the brake springs are manually compressed you will have no b...

Page 183: ...the disabled vehicle On vehicles with air brakes release the emergency brake system by compressing the brake chamber springs as outlined in this section This is to prevent the possibility of the emerg...

Page 184: ...towing vehicle and the disabled vehicle Before Towing Block the wheels of the disabled vehicle On vehicles with air brakes release the emergency brake system by compressing the brake chamber springs a...

Page 185: ...cting from the towing vehicle 3 Check and fill the rear axle with oil as required Releasing Air Operated Parking Brakes If your vehicle has air brakes you could have a special towing problem If your v...

Page 186: ...brakes Follow the same procedure to release the other brake or brakes 7 At the repair facility apply air pressure of at least 70 psi 480 kPa to the brake chambers either from an external air supply o...

Page 187: ...e 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 Heavy Duty Trailer Wiring Package Your vehicle...

Page 188: ...NOTES 188...

Page 189: ...n Fluid 214 Hydraulic Clutch 215 Engine Coolant 216 Coolant Surge Tank Pressure Cap 219 Engine Overheating 219 Cooling System 221 Power Steering Fluid 225 Windshield Washer Fluid 226 Brakes 227 Batter...

Page 190: ...es 271 Finish Care 271 Windshield and Wiper Blades 272 Aluminum Wheels 272 Tires 273 Sheet Metal Damage 273 Finish Damage 273 Underbody Maintenance 273 Chemical Paint Spotting 274 Vehicle Care Appeara...

Page 191: ...ng stability ride and handling emissions systems aerodynamics durability and electronic systems like anti lock brakes traction control and stability control could be affected Some non dealer accessori...

Page 192: ...ay enable the engine to operate at horsepower and torque levels that could damage create failure or reduce the life of the engine engine emission system transmission and drivetrain Damage failure or r...

Page 193: ...hicle Be sure to use the proper nuts bolts and other fasteners English and metric fasteners can be easily confused If you use the wrong fasteners parts can later break or fall off You could be hurt If...

Page 194: ...vehicle Do not 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 Gri...

Page 195: ...se Notice Use of diesel fuel other than Ultra Low Sulfur Diesel 15 ppm sulfur maximum or engine oil other than low ash CJ 4 oil will cause permanent damage to the DPF and related components This damag...

Page 196: ...concentration i e greater than B5 biodiesel containing fuels or the use of unmodified bio oils blended into diesel fuel at any concentration is not recommended and could damage the fuel system and eng...

Page 197: ...ions about the fuel you are using contact your fuel supplier Canadian fuels are blended for seasonal changes Diesel Type A fuel is blended for better cold weather starting below 0 F or 18 C however yo...

Page 198: ...re is water in your diesel fuel and the weather is warm or humid fungus and bacteria can grow in the fuel They can damage your fuel system A diesel fuel biocide can be used to sterilize your fuel syst...

Page 199: ...ater In Fuel Light cont d Problem Recommended Action Light stays on immediately after refueling and a large amount of water was possibly pumped into the fuel tank Fuel tank purging is required See you...

Page 200: ...or motor oil and place it in the bowl gland 6 Spin the bowl onto the new filter element snugly by hand Do not use tools to tighten them together 7 Lubricate the filter top seal with clean diesel fuel...

Page 201: ...el filter water drain valve is opened while the engine is running Air in the fuel lines will not harm the engine or the vehicle However the engine may not be able to start until the fuel system is pri...

Page 202: ...r hand to repeatedly press and release the plunger 1 at the top of the fuel filter priming pump until fuel begins to seep from the breather valve 9 Tighten the fuel filter breather screw 2 to the spec...

Page 203: ...u are parked on a slope you may need to add up to 5 gallons 18 9 liters 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...

Page 204: ...el pump never let children pump fuel The fuel cap may be on either or both sides of your vehicle depending upon option content To remove the cap turn it slowly counterclockwise CAUTION Fuel can spray...

Page 205: ...ic electricity discharge from the container can ignite CAUTION Continued CAUTION Continued the fuel vapor You can be badly burned and your vehicle damaged if this occurs To help avoid injury to you an...

Page 206: ...ating temperature and the oil is warm turn off the engine and allow at least five minutes for the oil to drain back into the oil pan If you do not do this the oil dipstick might not show the actual le...

Page 207: ...reaches the wider portion A on the dipstick the engine oil must be changed as soon as possible or the engine could be damaged If the oil is below the ADD mark on the dipstick you need to add at least...

Page 208: ...can appear either alone or in combination with other American Petroleum Institute API designations such as API CJ 4 SL These letters show API levels of quality Notice Use only engine oils that have th...

Page 209: ...ded oils with the API service symbol are all you need for good performance and engine protection When to Change Engine Oil Vehicles Without the Engine Oil Life System Change the engine oil and filter...

Page 210: ...is ever reset accidentally you must change the oil at 3 000 miles 5 000 km or 150 hours of engine operation whichever occurs first since your last oil change Remember to reset the oil life system when...

Page 211: ...il 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...

Page 212: ...ed orange change zone replace the filter and reset the indicator To inspect the air cleaner filter remove the filter from the vehicle and lightly shake the filter to release loose dust and dirt If the...

Page 213: ...cleaner filter in place when you are driving Automatic Transmission Fluid When to Check A good time to check your automatic transmission fluid level is when the engine oil is checked See your Allison...

Page 214: ...enough for you to rest your fingers on the transmission case To check the transmission fluid level do the following 1 Remove the filler plug 2 Check to be sure that the lubricant level is up to the b...

Page 215: ...o regularly check clutch fluid unless you suspect there is a leak in the system Adding fluid will not correct a leak A fluid loss in this system could indicate a problem Have the system inspected and...

Page 216: ...roblem with engine overheating see Engine Overheating on page 219 A 50 50 mixture of clean drinkable water and DEX COOL coolant will Give freezing protection down to 34 F 37 C Give boiling protection...

Page 217: ...could catch fire and you or others could be burned Use a 50 50 mixture of clean drinkable water and DEX COOL coolant Notice If you use an improper coolant mixture your engine could overheat and be ba...

Page 218: ...and 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 i...

Page 219: ...driver s side of the vehicle Notice Your vehicle s surge tank pressure cap is designed for use with medium duty cooling systems only If the surge tank pressure cap is not tightly installed coolant los...

Page 220: ...t be covered by your warranty If No Steam Is Coming From Your Engine An overheat warning along with a low coolant light can indicate a serious problem See Low Coolant Warning Light on page 129 for mor...

Page 221: ...least three minutes while you are parked If you still have the warning turn off the engine and get everyone out of the vehicle until it cools down You may decide not to lift the hood but to get servi...

Page 222: ...idle speed is doubled by pushing the accelerator pedal down If it does not your vehicle needs service Turn off the engine Notice Using coolant other than DEX COOL may cause premature engine heater co...

Page 223: ...turn the pressure cap CAUTION Adding only plain water to your cooling system can be dangerous Plain water or some other liquid such as alcohol can boil before the proper coolant mixture will Your veh...

Page 224: ...e tank pressure cap when the cooling system including the coolant surge tank pressure cap and upper radiator hose is no longer hot Turn the pressure cap slowly counterclockwise about one full turn If...

Page 225: ...he pressure cap is hand tight and fully seated Power Steering Fluid See Scheduled Maintenance on page 295 to determine when to check your power steering fluid How To Check Power Steering Fluid Check y...

Page 226: ...ing power steering fluid or making a complete fluid change always use the proper fluid Failure to use the proper fluid can cause leaks and damage hoses and seals Windshield Washer Fluid What to Use Wh...

Page 227: ...ing occurs which could damage the tank if it is completely full Do not use engine coolant antifreeze in your windshield washer It can damage the vehicle s windshield washer system and paint Brakes Bra...

Page 228: ...keep dirt from entering the reservoir CAUTION With the wrong kind of fluid in the brake system the brakes may not work well This could cause a crash Always use the proper brake fluid Notice Using the...

Page 229: ...brake stop the brakes adjust for wear Brake Adjustment on Air Braked Vehicles Your vehicle has automatic slack adjusters Every time you make a brake stop the brakes automatically adjust for wear Slack...

Page 230: ...r example if someone puts in brake linings that are wrong for your vehicle the balance between the front and rear brakes can change for the worse The braking performance you have come to expect can ch...

Page 231: ...heduled Maintenance on page 295 for more about servicing this filter Electric Air Compressor Your vehicle may have an electric air compressor This compressor is used to run options that require pressu...

Page 232: ...Chassis Lubrication 232...

Page 233: ...y chassis lubricant 6 Slack Adjuster One fitting 7 Brake Cam Roller Pins Apply engine oil 8 Front Steering Knuckles One fitting each side lower bushing Hand operated grease gun only Hand pack upper be...

Page 234: ...gs each joint 1610 Series and larger lubricate with GM Part No 1051344 Wheel Bearing Lubricant 18 Rear Wheel Bearings Hand pack or lubricate 19 Rear Axle Fill to level of filler plug 20 Parking Brake...

Page 235: ...cer and reproductive harm Wash hands after handling Vehicle Storage If you are not going to drive your vehicle for 25 days or more remove the black negative cable from each battery This will help keep...

Page 236: ...your vehicle 1 Check the other vehicle It must have a 12 volt battery or batteries with a negative ground system Notice If the other vehicle s system is not a 12 volt system with a negative ground bo...

Page 237: ...could save the radio 4 Locate the batteries on each vehicle Find the positive and negative terminals on each battery You will not see the batteries of your vehicle under the hood They are located in...

Page 238: ...Negative will go to a heavy unpainted metal engine part or to a remote negative terminal if the vehicle has one Do not connect positive to negative or you will get a short that would damage the batter...

Page 239: ...nal on the vehicle with the dead battery 9 Connect the other end of the negative cable at least 18 inches 45 cm away from the dead battery but not near engine parts that move The electrical connection...

Page 240: ...ine Part or Remote Negative Terminal B Good Battery or Remote Positive and Remote Negative Terminals C Dead Battery or Remote Positive Terminal To disconnect the jumper cables from both vehicles do th...

Page 241: ...your vehicle through deep puddles or standing water If you must drive through water that is higher than the front or rear axle see your dealer immediately afterward to have the condition of the axle...

Page 242: ...etermine what kind of lubricant to use See Part C Recommended Fluids and Lubricants on page 321 Cab Tilting Before You Tilt the Cab Most fluids and lubricants requiring regular checking can be accesse...

Page 243: ...at the rear of the cab on the passenger s side 2 Turn the lever pin so that the tab is aligned with the slot Remove the lever pin 3 Move the primary tilt lever all the way down 4 Pull the secondary la...

Page 244: ...forward 6 Tilt the cab all the way forward until the cab support under the cab locks fully A Safety Lock Pin B Cab Support 7 Remove the safety lock pin from its retainer on the cab support Insert the...

Page 245: ...get on hot engine parts and start a fire These include liquids like fuel oil coolant brake fluid windshield washer and other fluids and plastic or rubber You or others could be burned Be careful not...

Page 246: ...port to release the detent 3 Using the handle located at the bottom of the cab toward the back lower the cab until the hook catches and the cab is held down 4 Push the primary tilt lever upward fully...

Page 247: ...d to the chassis before moving the vehicle Lifting the Front Panel To access the windshield washer fluid reservoir and the clutch fluid reservoir the front panel must be lifted 1 To lift the panel gra...

Page 248: ...m Prohibited The following information relates to compliance with federal noise emission standards for vehicles with a Gross Vehicle Weight Rating GVWR of more than 10 000 lbs 4 536 kg The Maintenance...

Page 249: ...presumed to constitute tampering are the acts listed below Insulation Removal of the noise shields or any underhood insulation Engine Removal or rendering engine speed governor if the vehicle has one...

Page 250: ...blades should be inspected at least twice a year for wear or cracking See Wiper Blade Check under At Least Twice a Year on page 316 for more information Replacement blades come in different types and...

Page 251: ...teps 1 and 2 Other Service Items Fuel Filter 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...

Page 252: ...particles To drain the water or to replace the element follow the water draining and element replacement procedure under Water in Fuel on page 198 Secondary Fuel Filter and Heater Your vehicle may ha...

Page 253: ...ecked If your vehicle has oil filled hubs occasionally check to see if they have enough oil You can tell if there is oil there by using the circular gage on the sight glass If there isn t clean the ru...

Page 254: ...Your Vehicle on page 180 CAUTION Continued CAUTION Continued Underinflated tires pose the same danger as overloaded tires The resulting accident could cause serious injury Check all tires frequently...

Page 255: ...a month or more Also check the tire pressure of the spare tire if your vehicle has one How to Check Use a good quality pocket type gage to check tire pressure You cannot tell if your vehicle s tires a...

Page 256: ...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 on page 259 for wheel n...

Page 257: ...age that cannot 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 sizes brands or types ra...

Page 258: ...lock brakes traction control and electronic stability control the performance of these systems can be affected CAUTION If you add different sized wheels your vehicle may not provide an acceptable leve...

Page 259: ...ling one way or the other the 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 Wh...

Page 260: ...osition 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 opposi...

Page 261: ...80 lb ft 650 Y if a 10 hole stud using the following diagrams CAUTION Never use oil or grease on studs or the threads of the wheel nuts If you do the wheel nuts might come loose and the wheel could fa...

Page 262: ...hubs wheel nuts or wheels be sure to use GM original equipment parts CAUTION Rust or dirt on a wheel or on the parts to which it is fastened can make wheel nuts become loose after a time The wheel co...

Page 263: ...aces CAUTION Using the wrong replacement wheels wheel bolts or wheel nuts on your vehicle can be dangerous It could affect the braking and handling of your vehicle make your tires lose air and make yo...

Page 264: ...nuts be sure you get the correct ones Each new wheel should match the original wheel in load carrying capacity inflation pressure capacity diameter width offset and mounting configuration Using wheel...

Page 265: ...e 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 th...

Page 266: ...tire in the vehicle Few drivers of these vehicles have the necessary equipment aboard to be able to change a flat tire safely For example you would need a truck jack that can lift several thousand pou...

Page 267: ...for the surfaces being cleaned Permanent damage may result from using cleaners on surfaces for which they were not intended Use glass cleaner only on glass Remove any accidental over spray from other...

Page 268: ...t from the use of many organic solvents such as naptha alcohol etc Fabric Carpet Use a vacuum cleaner with a soft brush attachment frequently to remove dust and loose dirt A canister vacuum with a bea...

Page 269: ...tic Surfaces A soft cloth dampened with water may be used to remove dust If a more thorough cleaning is necessary a clean soft cloth dampened with a mild soap solution can be used to gently remove dus...

Page 270: ...s retention and durability The best way to preserve the vehicle s finish is to keep it clean by washing it often with lukewarm or cold water Do not wash the vehicle in the direct rays of the sun Use a...

Page 271: ...droppings chemicals from industrial chimneys etc can damage the vehicle s finish if they remain on painted surfaces Wash the vehicle as soon as possible If necessary use non abrasive cleaners that ar...

Page 272: ...cleaners that contain acid on aluminum or chrome plated wheels you could damage the surface of the wheel s The repairs would not be covered by your warranty Use only GM approved cleaners on aluminum...

Page 273: ...n the finish should be repaired right away Bare metal will corrode quickly and may develop into major repair expense Minor chips and scratches can be repaired with touch up materials available from yo...

Page 274: ...ehicles damaged by this fallout condition within 12 months or 12 000 miles 20 000 km of purchase whichever occurs first Vehicle Care Appearance Materials Description Usage Polishing Cloth Wax Treated...

Page 275: ...emoves spots and stains from carpets vinyl and cloth upholstery Odor Eliminator Odorless spray odor eliminator used on fabrics vinyl leather and carpet Vehicle Identification Vehicle Identification Nu...

Page 276: ...indshield wiper motor is protected by a circuit breaker inside the motor and a circuit breaker or fuse in the fuse block If the motor overheats the wipers will stop until the motor cools If the overlo...

Page 277: ...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 booster Before changing a fuse turn...

Page 278: ...your vehicle that you can get along without like the radio or cigarette lighter and use its fuse if it is the value you need Remember to replace the fuse as soon as you can These fuses are non cycling...

Page 279: ...Fuses Usage 1 Ignition Switch 2 Cigarette Lighter 3 Engine Control Module Ignition 1 Fuses Usage 4 Transmission Control Module Ignition Chime 5 Assembly Line Data Link Connector 279...

Page 280: ...ke Off 10 Ignition Power 11 Left Trailer Turn Lamp 12 Auxiliary Ignition ON 13 Auxiliary Battery Direct 14 Driver s Side Headlamp 15 Passenger s Side Headlamp Fuses Usage 16 Headlamp 17 Heated Fuel 18...

Page 281: ...ot use maxi fuses of higher amperage than those indicated on the maxi fuse block Fuses Usage ST TURN HAZ Stoplamp Turn Signals Hazard Warning Flashers IGN SW 3 Air Conditioner Axle Chassis INT EXT LIG...

Page 282: ...ock B C Relay Block C D Relay Block D Not Shown Relay Block A Usage 1 Power Window If Equipped 2 Power Main ECU 3 High Beam 4 Lighting 5 Lighting Low High 6 Trailer Turn Signal Left Headlamp 7 Taillam...

Page 283: ...Equipped 2 Air Conditioning Compressor If Equipped 3 Heater Fan 4 Ignition Accessory 5 Ignition 1 6 Ignition 2 7 Auxiliary 8 Horn 9 Ignition 3 10 Dome Lamp If Equipped 11 Exhaust Brake If Equipped 12...

Page 284: ...Engine Run 3 Daytime Running Lamps DRL Off Parking 4 Parking Lamps Daytime Running Lamps DRL 5 Fuel Filter Heated Fuel 6 Stop Lamp Relay Block D Usage 1 Neutral Medium Duty Transmission 2 Back up Lam...

Page 285: ...onditioning system refrigerant charge amount see the refrigerant caution label located under the hood See your dealer for more information Cooling System Engine Torque below 660 lb ft LYA LYB LYC 33 6...

Page 286: ...able to 6x4 vehicles with a 152 inch wheelbase 2 One 25 gallon 94 6 L tank and one 50 gallon 189 2 L tank Available only on 4x2 vehicles with 128 inch or 140 inch wheelbases or 6x4 vehicles with a 152...

Page 287: ...3000 MD 3500 with PTO Provision 59 8 pt 28 1 L MD 3000 MD 3500 without PTO Provision 52 0 pt 24 6 L Add 2 pints 1 L when changing spin on or remote filter See the Allison Automatic Transmission Operat...

Page 288: ...mal Maintenance Replacement Parts Part Part Number Air Compressor Filter Haldex Air Compressor 100696 E1 Oil Filter 943924752 Engine Air Cleaner Filter P5339303 Chassis Mounted Fuel Filter 15725783 En...

Page 289: ...Engine Drive Belt Routing Belt routing for non air conditioning option shown Dotted line shows routing for vehicles with air conditioning Isuzu 6H Diesel Engine 289...

Page 290: ...NOTES 290...

Page 291: ...heduled Maintenance Services 294 Using the Maintenance Schedule 294 Scheduled Maintenance Supplements 295 Scheduled Maintenance 295 Part B Owner Checks and Services 315 At Each Fuel Fill 315 At Least...

Page 292: ...necessary to keep your vehicle in good working condition Any damage caused by failure to follow scheduled maintenance may not be covered by warranty Your Vehicle and the Environment Proper vehicle ma...

Page 293: ...Continued proper tools and equipment for the job If you have any doubt have a qualified technician do the work See Doing Your Own Service Work on page 193 If you want to purchase service information...

Page 294: ...ve If you have any questions on how to keep your vehicle in good condition see your dealer This part tells you the maintenance services you should have done and when to schedule them When you go to yo...

Page 295: ...ervices See Service Publications Ordering Information on page 338 100 Miles 160 km Wheel stud nut service 30 1 000 Miles 1 600 km Wheel stud nut service 30 Rear axle air shift motor service 9 7 500 Mi...

Page 296: ...change indicator at every engine oil change See Engine Air Cleaner Filter on page 211 for more information Chassis lubrication service or every 6 months whichever occurs first 10 Check fluid levels o...

Page 297: ...lean the cooling system filter cap with clean water clean the core pressure test the cap and the system for proper pressure capability and inspect the condition of cooling and heater hoses and clamps...

Page 298: ...Engine Oil Life System on page 209 2 8 Inspect engine air cleaner filter change indicator If necessary replace the filter If vehicle is driven in dusty dirty conditions inspect filter change indicator...

Page 299: ...lled engine cooling fan service 3 17 Shields and underhood insulation service 3 4 18 37 500 Miles 60 000 km Check fluid levels or every 3 months whichever occurs first 1 5 Chassis lubrication service...

Page 300: ...y 750 hours of engine operation whichever occurs first Chassis lubrication service or every 6 months whichever occurs first 10 Cooling system service Clean the cooling system filler cap with clean wat...

Page 301: ...ake system service or every 24 months whichever occurs first 3 4 20 48 000 Miles 75 000 km Lubricate U joints or every 6 months whichever occurs first 50 000 Miles 80 000 km Inspect air compressor dis...

Page 302: ...indicator at every engine oil change See Engine Air Cleaner Filter on page 211 for more information Check fluid levels or every 3 months whichever occurs first 1 5 Replace fuel filter or every 750 ho...

Page 303: ...ce or every 6 months whichever occurs first 10 Cooling system service Clean the cooling system filler cap with clean water clean the core pressure test the cap and the system for proper pressure capab...

Page 304: ...See Engine Oil Life System on page 209 2 8 Inspect engine air cleaner filter change indicator If necessary replace the filter If vehicle is driven in dusty dirty conditions inspect filter change indic...

Page 305: ...cally controlled engine cooling fan service 3 17 Shields and underhood insulation service 3 4 18 82 500 Miles 132 000 km Check fluid levels or every 3 months whichever occurs first 1 5 Chassis lubrica...

Page 306: ...er or every 750 hours of engine operation whichever occurs first Chassis lubrication service or every 6 months whichever occurs first 10 Cooling system service Clean the cooling system filler cap with...

Page 307: ...3 17 Shields and underhood insulation service 3 4 18 Rear axle air shift motor service 9 Air intake system service or every 24 months whichever occurs first 3 4 20 96 000 Miles 152 000 km Lubricate U...

Page 308: ...10 000 miles 16 000 km or every 12 months or every 3 000 hours whichever occurs first 32 200 000 Miles 320 000 km Rear axle service Eaton Rockwell Spicer axles or every 12 months whichever occurs fir...

Page 309: ...ison Transmission your owner manual is supplemented by an Allison Transmission Operator s Manual Always refer to these manuals for related maintenance services 2 An Emission Control Service 3 A Noise...

Page 310: ...in front suspension front axle and steering linkage Do not lubricate kingpin bushings with air pressure equipment instead use a hand grease gun to ensure complete purge and eliminate sealer cap disto...

Page 311: ...n Replace parts as needed 13 Adjust tire pressures as indicated on the Certification or Tire Information label for optimum tire life See Tires on page 254 for further details Check tires for excessive...

Page 312: ...ed Fluids and Lubricants on page 321 20 Check the air intake system installation to see that gaskets are seated properly and all hose connections fasteners and other components are tight Tighten conne...

Page 313: ...n to replace the cartridge Test air lines for leaks tighten as needed Replace compressor filter Inspect air parking brake chamber for leaks and damage Inspect lines and hoses for leaks cracks chafing...

Page 314: ...160 km Thereafter tighten them 1 000 miles 1 600 km after each time the wheel is removed See Tightening the Wheel Nuts on page 259 31 Inspect and clean any accumulated dirt gravel or other foreign ob...

Page 315: ...ore operating the vehicle At 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...

Page 316: ...Weatherstrip Lubrication Silicone grease on weatherstrips will make them last longer seal better and not stick or squeak Apply silicone grease with a clean cloth During very cold damp weather more fr...

Page 317: ...ld work only when the clutch pedal is all the way down Transmission Shift Indicator Check Check that the indicator points to the gear chosen Steering Check Be alert for any changes in steering action...

Page 318: ...ud or dirt is not caked on the exhaust system especially in the area of the diesel particulate filter and tailpipe Clean the area as needed See Diesel Particulate Filter on page 87 At high mileages th...

Page 319: ...ctors 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 Door Latche...

Page 320: ...ld be loosened before being flushed Engine Cover Check Check that the cab s engine cover and seal if the vehicle has one are not torn or damaged Be sure that the cover is clamped down firmly to the fl...

Page 321: ...reme 11 Brake Fluid or equivalent DOT 3 brake fluid Windshield Washer Solvent GM Optikleen Washer Solvent Usage Fluid Lubricant Exhaust Brake Ball Joint Cap Lubricant High Temperature Grease GM Part N...

Page 322: ...nada 10953512 Rear Axle Shift Motor Lubricant Refrigerant Oil GM Part No U S 5416939 in Canada 10953496 Usage Fluid Lubricant Propshafts and Splines Wheel bearing lubricant meeting requirements of NLG...

Page 323: ...med record the date odometer reading and who performed the service and any additional information from Owner Checks and Services on the following record pages Also you should retain all maintenance re...

Page 324: ...Date Miles km Or Hours Serviced By Maintenance Record 324...

Page 325: ...Date Miles km Or Hours Serviced By Maintenance Record 325...

Page 326: ...Date Miles km Or Hours Serviced By Maintenance Record 326...

Page 327: ...Damage Repair 332 Reporting Safety Defects 336 Reporting Safety Defects to the United States Government 336 Reporting Safety Defects to the Canadian Government 337 Reporting Safety Defects to General...

Page 328: ...acting a member of dealership management it appears your concern cannot be resolved by the dealership without further help contact the GM Medium Duty Truck Customer Assistance Center at 1 800 862 4389...

Page 329: ...e Limited Warranty Although you may be required to resort to this informal dispute resolution program prior to filing a court action use of the program is free of charge and your case will generally b...

Page 330: ...r to the addresses below United States Customer Assistance GM Medium Duty Truck Customer Assistance Center Customer Assistance Center P O Box 44947 Detroit MI 48244 www GMC com 1 800 862 4389 1 800 46...

Page 331: ...gram This program available to qualified applicants can reimburse you up to 1 000 of the cost of eligible aftermarket adaptive equipment required for your vehicle such as hand controls or a wheelchair...

Page 332: ...ty GM Medium Duty Truck dealer and their hours of operation Collision Damage Repair If your vehicle is involved in a collision and it is damaged have the damage repaired by a qualified technician usin...

Page 333: ...ined technicians and state of the art equipment or be able to recommend a collision repair center that has GM trained technicians and comparable equipment Insuring Your Vehicle Protect your investment...

Page 334: ...t This will help guard against post accident legal action If you need roadside assistance call GM Roadside Assistance See Roadside Assistance Program on page 332 for more information If your vehicle c...

Page 335: ...on your vehicle If you have a question ask for an explanation Reputable shops welcome this opportunity Managing the Vehicle Damage Repair Process In the event that your vehicle requires damage repair...

Page 336: ...d cause injury or death inform the National Highway Traffic Safety Administration NHTSA immediately in addition to notifying General Motors If NHTSA receives similar complaints it may open an investig...

Page 337: ...Road Ottawa Ontario K1B 3V9 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...

Page 338: ...ice of your vehicle Owner Information Owner publications are written specifically for owners and intended to provide basic operational information about the vehicle The owner s manual will include the...

Page 339: ...a number of sophisticated computers that record information about the vehicle s performance and how it is driven For example your vehicle uses computer modules to monitor and control engine and transm...

Page 340: ...is recorded by the EDR under normal driving conditions and no personal data e g name gender age and crash location is recorded However other parties such as law enforcement could combine the EDR data...

Page 341: ...the navigation system operating manual for information on stored data and for deletion instructions Radio Frequency Identification RFID RFID technology is used in some vehicles for functions such as t...

Page 342: ...NOTES 342...

Page 343: ...eaning the Inside of Your Vehicle 267 Fabric Carpet 268 Finish Care 271 Finish Damage 273 Instrument Panel Vinyl and Other Plastic Surfaces 269 Appearance Care cont Sheet Metal Damage 273 Tires 273 Un...

Page 344: ...Braking in Emergencies 156 Break In New Vehicle 65 Bulb Replacement 250 C Cab Tilting Before You Tilt the Cab 242 Lifting the Front Panel 247 Lowering the Cab 245 Tilting the Cab 243 California Propo...

Page 345: ...mps Lenses 271 Fabric Carpet 268 Finish Care 271 Inside of Your Vehicle 267 Instrument Panel Vinyl and Other Plastic Surfaces 269 Cleaning cont Tires 273 Underbody Maintenance 273 Washing Your Vehicle...

Page 346: ...Daytime Running Lamps Indicator Light 134 Defensive Driving 148 Diesel Engine 74 Engine Alarm and Automatic Shutdown 69 Exhaust Restrictor 70 Fuel 195 Diesel Engine cont High Idle System 70 Starting 6...

Page 347: ...Light 132 Check and Service Engine Soon Light 130 Checks Before Operating 71 Coolant 216 Engine cont Coolant Heater 73 Coolant Temperature Gage 128 Diesel Engine Exhaust Brake 74 Drive Belt Routing 2...

Page 348: ...Your Tank 204 Filter 251 Gage 135 Primary Filter and Water Separator 252 Running Out of Fuel 203 Very Cold Weather Operation 198 Fuel cont Water in Fuel 198 Water in Warning Light 135 What Fuel to Us...

Page 349: ...am On Light 134 Highway Hypnosis 172 Hill and Mountain Roads 172 Horn 102 Hourmeter Gage 137 How to Use This Manual 17 How to Wear Safety Belts Properly 32 Hydraulic Clutch 215 I Ignition Positions 66...

Page 350: ...ake Indicator 133 Highbeam On 134 Low Coolant Warning 129 Low Oil Level 131 Light cont Malfunction Indicator 130 Range Inhibit Warning Indicator 124 Reduced Engine Power 133 Safety Belt Reminder 121 S...

Page 351: ...ds and Lubricants 321 Part D Maintenance Record 323 Scheduled Maintenance 295 Scheduled Maintenance Supplements 295 Using 294 Your Vehicle and the Environment 292 Malfunction Indicator Light 130 Manua...

Page 352: ...Manual Mirrors 93 Overspeed Warning Light 132 Owners Canadian 3 P Paint Damage 273 Park Brake 81 82 Parking 80 Brake Burnish Procedure 85 Over Things That Burn 86 Part A Scheduled Maintenance Service...

Page 353: ...trol 157 Shift Motor 242 Two Speed Electric Shift Control 75 Rear Reading Lamps 113 Reclining Seatbacks 24 Reduced Engine Power Light 133 Reporting Safety Defects Canadian Government 337 General Motor...

Page 354: ...on Seats 26 Center Seat 27 Manual Lumbar 23 Reclining Seatbacks 24 Securing a Child Restraint Medium Duty Vehicle 55 Service 191 Accessories and Modifications 191 California Proposition 65 Warning 192...

Page 355: ...263 When It Is Time for New Tires 257 Tow Hooks 179 Towing Your Vehicle 182 Traction Control System Active Light 128 Control System TCS 157 Trailer Connections 187 Trailer Brake Hand Control Valve 15...

Page 356: ...y and Symbols 17 Vehicle Damage 18 Warranty Emission Control Systems 3 Water Fuel 198 Water in Fuel Warning Light 135 What Fuel to Use 195 Wheels Alignment and Tire Balance 259 Different Size 258 Fron...

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