GMC 2.8L Duramax Diesel 2020 Manual Download Page 83

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Chevrolet/GMC 2.8L Duramax Diesel Engine Supplement (GMNA-Localizing-

U.S./Canada-13336155) - 2020 - CRC - 5/6/19

Vehicle Care

Fuses

Usage

F39

Rear differential
lock actuators

F40

Front differential
lock actuators/
Selective catalytic
reduction power
module wake up

F41

Glow plug module

F42

–

F43

–

F44

Fuel heater

F45

Selective catalytic
reduction power
module heater

F46

Cooling fan clutch

F47

Heater crankcase
ventilation

F48

Fog lamps

F49

Selective catalytic
reduction power
module wake up

F50

Trailer parking
lamps

Fuses

Usage

F51

Horn

F52

–

F53

–

F54

–

F55

–

F56

Washer pump

F57

–

F58

–

F59

–

F60

Mirror defogger

F61

–

F62

Selective catalytic
reduction power
module

F63

–

F64

Trailer reverse
lamps

F65

Left trailer
stoplamp/Turnlamp

F66

Right trailer
stoplamp/Turnlamp

Fuses

Usage

F67

Electric power
steering

F68

–

F69

Battery regulated
voltage control

F70

–

F71

–

F72

–

F73

–

F74

Generator

F75

–

Relays

Usage

Air conditioning
clutch

Starter

Powertrain sensor

Wiper speed

Wiper control

Cargo lamp/Bed
lighting

Summary of Contents for 2.8L Duramax Diesel 2020

Page 1: ...Y CMY K 20_MUL_2 8L_Duramax_Diesel_Engline_Supplement__COV_en_US_84186892A_2019MAY16 ai 1 5 16 2019 8 20 14 AM 20_MUL_2 8L_Duramax_Diesel_Engline_Supplement__COV_en_US_84186892A_2019MAY16 ai 1 5 16 20...

Page 2: ...x Diesel Engine Supplement GMNA Localizing U S Canada 13336155 2020 CRC 5 6 19 Contents Introduction 2 Instruments and Controls 5 Driving and Operating 16 Vehicle Care 64 Service and Maintenance 88 Te...

Page 3: ...e documentation relating to your specific vehicle to confirm the features This manual contains information that pertains to the operation of the diesel engine It also contains the Diesel Maintenance S...

Page 4: ...MNA Localizing U S Canada 13336155 2020 CRC 5 6 19 Introduction 3 Index A good place to look for what you need is the Index in the back of this supplement It is an alphabetical list of what is in the...

Page 5: ...Chevrolet GMC 2 8L Duramax Diesel Engine Supplement GMNA Localizing U S Canada 13336155 2020 CRC 5 6 19 4 Introduction 2 NOTES...

Page 6: ...dicators Instrument Cluster 6 Fuel Gauge 9 Engine Oil Pressure Gauge 10 Malfunction Indicator Lamp Check Engine Light 11 Wait to Start Light 12 Diesel Exhaust Fluid DEF Warning Light 13 Power Take Off...

Page 7: ...amax Diesel Engine Supplement GMNA Localizing U S Canada 13336155 2020 CRC 5 6 19 6 Instruments and Controls Warning Lights Gauges and Indicators Instrument Cluster English Base Level 4 Cylinder Picku...

Page 8: ...Chevrolet GMC 2 8L Duramax Diesel Engine Supplement GMNA Localizing U S Canada 13336155 2020 CRC 5 6 19 Instruments and Controls 7 English Uplevel 4 Cylinder Pickup Shown Metric Similar...

Page 9: ...Chevrolet GMC 2 8L Duramax Diesel Engine Supplement GMNA Localizing U S Canada 13336155 2020 CRC 5 6 19 8 Instruments and Controls English Van Shown Metric Similar...

Page 10: ...kup Shown Uplevel Similar Metric Van Models English Van Models When the ignition is on the fuel gauge shows approximately how much fuel the vehicle has left in the tank The gauge will first indicate E...

Page 11: ...er Information Center DIC in the owner s manual Metric Van Models English Van Models Caution Lack of proper engine oil maintenance can damage the engine Driving with the engine oil low can also damage...

Page 12: ...iceable Being aware of the light and seeking service promptly when it comes on may prevent damage Caution If the vehicle is driven continually with this light on the emission control system may not wo...

Page 13: ...t does not come on when the ignition is on with the engine not running Critical emission control systems have not been completely diagnosed If this happens the vehicle would not be ready for inspectio...

Page 14: ...ll conditions required to engage PTO have not been met when enabling PTO the PTO light will turn on then turn off after one second See Power Take Off PTO 0 46 Information Displays Driver Information C...

Page 15: ...Personalization Van Models This vehicle may have customization capabilities that allow you to program certain features to one preferred setting Customization features can only be programmed to one set...

Page 16: ...infotainment display 2 Touch Vehicle to display a list of available options 3 Touch to select the desired feature setting 4 Touch 9 or R to turn a feature off or on 5 Touch z to go to the top level o...

Page 17: ...odiesel 33 Cold Weather Operation 34 Water in Fuel 34 Running Out of Fuel 38 Fuel Filter Replacement 38 Filling the Tank 40 Filling a Portable Fuel Container 41 Trailer Towing Trailer Towing 42 Conver...

Page 18: ...tart after 15 seconds of cranking turn the ignition off Wait one minute for the cranking motor to cool then try the same steps again If you are trying to start the engine after you have run out of fue...

Page 19: ...e Warning Do not use gasoline or starting aids such as ether in the air intake They could damage the engine which may not be covered by the vehicle warranty They could also cause a fire which could ca...

Page 20: ...ns Only The vehicle may have this system which can be used to increase the engine idle speed Fast Idle control will be enabled when the following conditions are met The parking brake is set The transm...

Page 21: ...ow for proper radiator and air cooler performance Do not use the winter cover if towing a trailer The vehicle may overheat if the radiator is covered while towing Do not modify the cover The winter co...

Page 22: ...inter cover reverse Steps 1 4 Engine Heater Warning Do not plug in the engine block heater while the vehicle is parked in a garage or under a carport Property damage or personal injury may result Alwa...

Page 23: ...o a normal grounded 110 volt AC outlet Warning Improper use of the heater cord or an extension cord can damage the cord and may result in overheating and fire Plug the cord into a three prong electric...

Page 24: ...the coolant heater to improve ease of starting at temperatures between 18 C 0 F and 29 C 20 F Keep the coolant heater plugged in for a minimum of four hours At temperatures below 29 C 20 F the coolan...

Page 25: ...st system components must not be altered Inspect regularly and clean any mud or dirt from the exhaust cooler especially where the exhaust cooler connects to the tailpipe and the openings where fresh a...

Page 26: ...le speed Along with this a burning smell and reduction in fuel economy may be noticed This is normal If you continue to drive with the DPF warning message on and the exhaust filter is not cleaned as r...

Page 27: ...vailable automatic self cleaning may have begun If conditions cannot be met for self cleaning to complete and manual regeneration is selected it may take up to four minutes for the system to switch to...

Page 28: ...turn off the exhaust brake then try again when the DIC message prompts When manual regeneration begins the engine speed increases the engine cooling fan sound increases and a DIC message indicates th...

Page 29: ...tank capacity see Capacities and Specifications 0 97 It is normal to hear the DEF system purge fluid back into the tank after the vehicle is shut off Locating Diesel Exhaust Fluid DEF can be purchased...

Page 30: ...the first opportunity after a low warning indication to avoid vehicle speed limitations It may take some time for the vehicle to detect that DEF has been added If there was a vehicle speed limitation...

Page 31: ...blem occurs with the vehicle emission system a DIC message displays along with distance until vehicle speed is limited The speed limitation will occur in a series of steps with the final speed limitat...

Page 32: ...aust brake is activated when Tow Haul Mode is activated See Tow Haul Mode in the owner s manual A light comes on in the instrument cluster when the exhaust brake and Tow Haul are activated The switch...

Page 33: ...t use a diesel blend containing more than 20 biodiesel by volume Caution Use of fuel that does not comply with the required technical standards can lead to engine power loss increased wear or engine d...

Page 34: ...entional diesel fuel and biodiesel blends but may not prevent all cases In case of severe winter conditions the fuel filter may become clogged by wax naturally present in the fuel To unclog it move th...

Page 35: ...ilter may become clogged by wax naturally present in the fuel To unclog it move the vehicle to a warm garage area and allow the filter to warm up The fuel filter may need to be replaced See Fuel Filte...

Page 36: ...ove water see your dealer or a qualified technician Improper purging can damage the fuel system and block the FOH Water in Fuel Troubleshooting If the WATER IN FUEL SERVICE REQUIRED message comes on P...

Page 37: ...ck on without refueling then fuel tank purging is required See your dealer If the message displays and the engine stalls or runs rough do not drive until the water contaminated fuel is drained Caution...

Page 38: ...d to be primed before operating the vehicle and the Fuel Operated Heater FOH If air is present the following may have happened The vehicle ran out of fuel The fuel filter was removed The fuel lines we...

Page 39: ...unning out of fuel it may take a few drive cycles to clear On van models only the Fuel Operated Heater FOH stops automatically when the fuel tank volume is less than or equal to 10 of the total tank T...

Page 40: ...gnites it and people could be burned Do not let it get on hot engine parts and keep matches or other ignition sources away The fuel filter is on the driver side inside the frame rail in front of the f...

Page 41: ...s to you and others Continued Warning Continued Read and follow all the instructions on the fuel pump island Turn off the engine when refueling Keep sparks flames and smoking materials away from fuel...

Page 42: ...the fill nozzle Clean fuel from painted surfaces as soon as possible See Exterior Care 0 87 Reinstall the cap by turning it clockwise until it clicks Push the fuel door closed Warning If a fire starts...

Page 43: ...ng When towing at high elevation on steep uphill grades consider the following Engine coolant at higher elevation will boil at a lower temperature than at or near sea level If the engine is turned off...

Page 44: ...2 3 492 kg 7 700 lb 5 761 kg 12 700 lb Short Wheelbase Crew Cab 3 42 3 447 kg 7 600 lb 5 761 kg 12 700 lb Colorado Pickup Long Wheelbase Crew Cab 3 42 3 447 kg 7 600 lb 5 761 kg 12 700 lb Canyon Picku...

Page 45: ...kg 6 300 lb 5 897 kg 13 000 lb G3500 Passenger Van Short Wheelbase 3 42 2 586 kg 5 700 lb 5 897 kg 13 000 lb G3500 Passenger Van Long Wheelbase 3 42 2 404 kg 5 300 lb 5 897 kg 13 000 lb The Gross Com...

Page 46: ...han 181 kg 400 lb a weight distribution hitch is required with a maximum of 454 kg 1 000 lb Do not exceed the maximum allowable tongue weight for the vehicle Choose the shortest hitch extension that w...

Page 47: ...sure to CO can cause unconsciousness or even death Never operate PTO in an enclosed area such as a garage or building that has no fresh air ventilation See Engine Exhaust in the owner s manual Caution...

Page 48: ...engine starting and shutdown Stationary in cab and Remote PTO modes provide for engine shutdown due to critical engine conditions as well as a timed engine shutdown feature Preset PTO Preset Enable C...

Page 49: ...le if desired 4 Confirm the hood is closed 5 From outside the vehicle press and release the Remote PTO Arm switch 6 Within five seconds open and close the Remote PTO Engine Start Shutdown switch 7 The...

Page 50: ...Park and release the brake pedal and set the parking brake 2 Confirm cruise control is off 3 Confirm the hood is closed 4 Press and release the in cab PTO switch The PTO indicator light will blink slo...

Page 51: ...d RES on the cruise control can be used to tap up and tap down the engine speed Factory setting for the tap step is 100 rpm and the setting for the ramp rate is 150 rpm sec The GM Service Tool can ena...

Page 52: ...ty damage may result from vehicle movement The operator must ensure that the vehicle is secured against unauthorized access during Remote PTO operation The accelerator pedal is disabled when Remote PT...

Page 53: ...working speed but as a verification that the system is active and ready to go to a working speed The relay connections are made at the PTO Upfitter Connector located on the chassis frame behind the ca...

Page 54: ...RES on the cruise control can be used to tap up or if continuously held to ramp up to the desired operating speed SET on the cruise control can be used to tap down or coast down if continuously held t...

Page 55: ...and release the PTO in cab switch The PTO load relay disengages and the engine returns to base idle The PTO indicator light will turn off indicating the PTO load relay is disengaged and the stored se...

Page 56: ...ctive standby mode A shift out of P Park will not be allowed until one of the following actions is taken by the vehicle operator Press the Remote PTO Engine Start Shutdown switch Press the PTO in cab...

Page 57: ...switch inputs to comply with maximum speed and or rpm parameters some vehicle operating conditions such as downhill acceleration can cause the vehicle speed or engine rpm to exceed these limits In tho...

Page 58: ...crements through the Radio Customization menu COAST Press and hold SET on the cruise control to reduce the rpm at 150 rpm sec until the desired engine speed is reached or until the initial PTO Standby...

Page 59: ...e Maximum Value PTO Option Configuration VEHICLE STATIONARY PRESET SPEED VEHICLE STATIONARY PRESET SPEED VEHICLE STATIONARY VARIABLE SPEED VEHICLE MOBILE VARIABLE SPEED PTO Control In Cab PTO Mode In...

Page 60: ...o 64 km h 40 mph if this is programmed with the GM Service Tool Set Low Fuel Level for Engine Shutdown 15 0 25 Engine Run Time with PTO Active Timer ENABLED DISABLED ENABLED Engine Run Time while PTO...

Page 61: ...otentiometer Threshold 2 0 50 Maximum Remote Potentiometer Threshold 95 50 100 Remote Set Switch Transition to Low Voltage 33 of Ignition Voltage SET SPEED 1 STANDBY SPEED SET SPEED 1 or SET SPEED 2 R...

Page 62: ...u In Stationary Preset DISABLED DISABLED ENABLED Engine Run Shutdown Time Menu In Stationary Preset DISABLED DISABLED ENABLED Engine Speed Tap Step Menu In Stationary Variable and Mobile DISABLED DISA...

Page 63: ...e following parameters PTO Standby rpm PTO Set 1 Speed PTO Set 2 Speed Tap Step Speed PTO Engine Run Timer Driver Information Center DIC Warning Messages If the PTO indicator light does not remain on...

Page 64: ...n Fleet and Commercial vehicles To verify that the vehicle has this feature see www gmupfitter com to contact the GM Upfitter Integration Group for assistance If equipped this feature allows for manua...

Page 65: ...le performance and safety including such things as airbags braking stability ride and handling emissions systems aerodynamics durability and electronic systems like antilock brakes traction control an...

Page 66: ...emission system transmission and drivetrain The engine transmission and drivetrain have been designed and built to offer industry leading durability and performance in the most demanding applications...

Page 67: ...Chevrolet GMC 2 8L Duramax Diesel Engine Supplement GMNA Localizing U S Canada 13336155 2020 CRC 5 6 19 66 Vehicle Care Vehicle Checks Engine Compartment Overview 2 8L 4 Cylinder Engine Pickup Models...

Page 68: ...13336155 2020 CRC 5 6 19 Vehicle Care 67 1 Coolant Surge Tank and Pressure Cap 2 Engine Air Cleaner Filter 3 Engine Oil Fill Cap 4 Engine Fan Out of View 5 Engine Oil Dipstick 6 Engine Compartment Fu...

Page 69: ...Chevrolet GMC 2 8L Duramax Diesel Engine Supplement GMNA Localizing U S Canada 13336155 2020 CRC 5 6 19 68 Vehicle Care 2 8L 4 Cylinder Engine Van Models...

Page 70: ...ose of engine oil properly See What to Do with Used Oil in this section Checking Engine Oil Check the engine oil level regularly every 650 km 400 mi especially prior to a long trip The engine oil dips...

Page 71: ...per operating range the engine could be damaged Drain the excess oil or limit driving of the vehicle and seek a service professional to remove the excess oil See Engine Compartment Overview 0 66 for t...

Page 72: ...ting an oil of the appropriate viscosity grade it is recommended to select an oil of the correct specification See Specification earlier in this section Engine Oil Additives Engine Oil Flushes Do not...

Page 73: ...ine Pickup Models See Automatic Transmission Fluid in the owner s manual When to Check and Change 2 8L 4 Cylinder Engine Van Models It is not necessary to check the transmission fluid level A transmis...

Page 74: ...Air Duct To inspect and replace the filter 1 Remove the two screws 1 and lift the air cleaner filter housing base 3 to clear the turbo air duct 5 2 Unlock the two retaining clips 2 on the sides of th...

Page 75: ...ave the air cleaner filter in place when driving Cooling System The cooling system allows the engine to maintain the correct working temperature 2 8L 4 Cylinder Engine Pickup Models See Cooling System...

Page 76: ...wrong mixture the engine could get too hot but there would not be an overheat warning The engine could catch fire and you or others could be burned Use a 50 50 mixture of clean drinkable water and DEX...

Page 77: ...amage may occur If more coolant is needed add the proper DEX COOL coolant mixture at the surge tank but be careful not to spill it Warning Spilling coolant on hot engine parts can burn you Coolant con...

Page 78: ...is hand tight and fully seated 6 Verify coolant level after the engine is shut off and the coolant is cold If necessary repeat Steps 1 6 If the coolant level is still low after having followed these...

Page 79: ...the highest fan speed and open the window as necessary If the vehicle no longer has the overheat warning the vehicle can be driven Just to be safe drive slower for about 10 minutes If the warning does...

Page 80: ...vehicle See Engine Compartment Overview 0 66 Lift the cover to access the fuse block Caution Spilling liquid on any electrical component on the vehicle may damage it Always keep the covers on any elec...

Page 81: ...Chevrolet GMC 2 8L Duramax Diesel Engine Supplement GMNA Localizing U S Canada 13336155 2020 CRC 5 6 19 80 Vehicle Care 4 Cylinder Pickup...

Page 82: ...ighting F8 Engine control module miscellaneous F9 Engine control module Fuses Usage F10 Engine control module injectors F11 Mass airflow sensor F12 Starter F13 Traction control module F14 F15 F16 F17...

Page 83: ...case ventilation F48 Fog lamps F49 Selective catalytic reduction power module wake up F50 Trailer parking lamps Fuses Usage F51 Horn F52 F53 F54 F55 F56 Washer pump F57 F58 F59 F60 Mirror defogger F61...

Page 84: ...n K8 Fuel pump K9 Front differential lock actuators K10 Rear differential lock actuators K11 Center high mounted stoplamp K12 Fuel heater Relays Usage K13 Selective catalytic reduction power module he...

Page 85: ...Chevrolet GMC 2 8L Duramax Diesel Engine Supplement GMNA Localizing U S Canada 13336155 2020 CRC 5 6 19 84 Vehicle Care 4 Cylinder Van...

Page 86: ...Mirrors Rear vision camera 14 Washer 16 Horn 17 Transmission 18 Air conditioning 19 Engine control module battery 20 Left stop turn cutaway lamp 21 Left stop turn trailer lamp 22 Right stop turn cutaw...

Page 87: ...r 2 EV fan 63 64 Mass airflow sensor Canister vent Humidity sensor 65 Ignition coils injectors odd 66 Daytime running lamps 2 67 Daytime running lamps 1 uplevel 68 Auxiliary stoplamps 69 Trailer power...

Page 88: ...xhaust fluid wake up Relays Usage MR Rel 1 Fuel filter heater MR Rel 2 Diesel exhaust fluid power Wake up Mega Fuse Holder To check the fuse release the yellow clamps on both sides and pull off the co...

Page 89: ...ility of the owner to have all required maintenance performed Your dealer has trained technicians who can perform required maintenance using genuine replacement parts They have up to date tools and eq...

Page 90: ...mits on the Tire and Loading Information label See Vehicle Load Limits in the owner s manual Are driven on reasonable road surfaces within legal driving limits Use the recommended fuel See Fuel for Di...

Page 91: ...ician can perform this work If the engine oil life system is reset accidentally service the vehicle within 5 000 km 3 000 mi since the last service Reset the oil life system when the oil is changed Se...

Page 92: ...heck engine oil level and oil life percentage Change engine oil and filter if needed Replace engine air cleaner filter 1 Drain and fill engine cooling system 2 Visually inspect accessory drive belts 3...

Page 93: ...fe percentage Change engine oil and filter if needed Replace engine air cleaner filter 1 Change automatic transmission fluid and filter Drain and fill engine cooling system 2 Visually inspect accessor...

Page 94: ...Automatic Transmission 6 Speed DEXRON VI Automatic Transmission Fluid Automatic Transmission 8 Speed DEXRON HP Automatic Transmission Fluid Diesel Exhaust Aftertreatment System Diesel Exhaust Fluid G...

Page 95: ...by name part number or specification can be obtained from your dealer Part GM Part Number ACDelco Part Number Engine Air Cleaner Filter 4 Cylinder Pickup 23248945 A3216C 4 Cylinder Van 84000015 A3221...

Page 96: ...5 6 19 Service and Maintenance 95 Maintenance Records After the scheduled services are performed record the date odometer reading who performed the service and the type of services performed in the bo...

Page 97: ...let GMC 2 8L Duramax Diesel Engine Supplement GMNA Localizing U S Canada 13336155 2020 CRC 5 6 19 96 Technical Data Technical Data Vehicle Data Capacities and Specifications 97 Engine Drive Belt Routi...

Page 98: ...h Engine Cooling System Pickup Models 2 8L 4 Cylinder Engine 10 5 L 11 1 qt Engine Cooling System 2 8L 4 Cylinder Van Models Front Heater Core without Fuel Operated Heater FOH 13 7 L 14 4 qt Front Hea...

Page 99: ...5 6 L 6 0 qt Do not overfill the DEF tank See Diesel Exhaust Fluid 0 27 All quantities are approximate When adding be sure to fill to the appropriate level as recommended in this manual Recheck fluid...

Page 100: ...evrolet GMC 2 8L Duramax Diesel Engine Supplement GMNA Localizing U S Canada 13336155 2020 CRC 5 6 19 Technical Data 99 Engine Drive Belt Routing 2 8L 4 Cylinder Engine Pickup 2 8L 4 Cylinder Engine V...

Page 101: ...dicator 11 Cleaning Exterior Care 87 Cluster Instrument 6 Cold Weather Operation 34 Cooling System 74 Covers Winter 19 D Diesel Starting Your Engine 16 Diesel Exhaust Fluid 27 Diesel Exhaust Fluid DEF...

Page 102: ...2 Fuses Engine Compartment Fuse Block 79 G Gauges Engine Oil Pressure 10 Fuel 9 General Information Service and Maintenance 88 H Heater Engine 21 Fuel Operated 23 I Instrument Cluster 6 Introduction 2...

Page 103: ...Service Accessories and Modifications 64 Maintenance Records 95 Maintenance General Information 88 Specifications and Capacities 97 Starting the Diesel Engine 16 Supplement Using 2 T Top Tier Fuel 31...

Page 104: ...Y CMY K 20_MUL_2 8L_Duramax_Diesel_Engline_Supplement__COV_en_US_84186892A_2019MAY16 ai 1 5 16 2019 8 20 14 AM 20_MUL_2 8L_Duramax_Diesel_Engline_Supplement__COV_en_US_84186892A_2019MAY16 ai 1 5 16 20...

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