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Caution
If the air cleaner/filter is off, dirt can easily get into the engine, which could damage it. Always have the air cleaner/filter in place when you are driving.
The air cleaner/filter assembly may have an air cleaner/filter restriction indicator that shows when the engine air cleaner/filter is dirty and needs to be serviced. The air cleaner/filter restriction indicator is on the air cleaner resonator.
When to Inspect the Engine Air Cleaner/Filter For intervals on changing and inspecting the engine air filter, see Maintenance Schedule 0 116.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
How to Inspect the Engine Air Cleaner/Filter Do not start the engine or have the engine running with the engine air filter housing open. Before removing the engine air filter, make sure that the engine air filter housing and nearby components are free of dirt and debris. Remove the engine air filter. Lightly tap and shake the engine air filter (away from the vehicle) to release dust and dirt. Inspect the engine air filter for damage, and replace if damaged. Do not clean the engine air filter or components with water or compressed air. When the restriction indicator is in the red/orange “change” zone, replace the filter and reset the restriction indicator. The air cleaner/ filter assembly is at the front of the engine compartment.
1. Cover Screws 2. Restriction Indicator
To inspect and replace the filter and reset the restriction indicator: 1. Loosen the screws (1) on the
cover of the housing and lift up the cover.
2. Remove the air cleaner/filter
from the housing. Take care to dislodge as little dirt as possible.
3. Clean the filter sealing surface
4.
and the housing. Install the new engine air cleaner/filter.
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5. Reinstall the cover and tighten
the screws.
6. Reset the air cleaner/filter
restriction indicator (2), if equipped, by pressing the top button on the indicator.
See Maintenance Schedule 0 116 to determine when to replace the engine air cleaner/filter. { Warning
Operating the engine with the air cleaner/filter off can cause you or others to be burned. The air cleaner not only cleans the air; it helps to stop flames if the engine backfires. Use caution when working on the engine and do not drive with the air cleaner/filter off.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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Vehicle Care
Caution
If the air cleaner/filter is off, dirt can easily get into the engine, which could damage it. Always have the air cleaner/filter in place when you are driving.
Cooling System The cooling system allows the engine to maintain the correct working temperature. 4-Cylinder Pickup Models Refer to “Cooling System” in the owner manual.
8-Cylinder Pickup Models
Van Models
1. Coolant Surge Tank 2. Coolant Surge Tank
Pressure Cap
1. Coolant Surge Tank 2. Coolant Surge Tank
Pressure Cap
3. Engine Cooling Fan (Out
3. Engine Cooling Fan (Out
of View)
of View)
{ Warning
Heater and radiator hoses, and other engine parts, can be very hot. Do not touch them. If you do, you can be burned.
(Continued)
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
Warning (Continued)
Do not run the engine if there is a leak. If you run the engine, it could lose all coolant. That could cause an engine fire, and you could be burned. Get any leak fixed before you drive the vehicle.
Caution
Using coolant other than DEX-COOL® can cause premature engine, heater core, or radiator corrosion. In addition, the engine coolant could require changing sooner. Any repairs would not be covered by the vehicle warranty. Always use DEX-COOL (silicate-free) coolant in the vehicle.
Engine Coolant The cooling system in the vehicle is filled with DEX-COOL® engine coolant mixture. See Recommended Fluids and Lubricants 0 121 and Maintenance Schedule 0 116. The following explains the cooling system and how to add coolant when it is low. If there is a problem with engine overheating, see Engine Overheating 0 109. A 50/50 mixture of clean, drinkable water and DEX-COOL coolant will: . Give freezing protection down to
−37 °C (−34 °F).
. Give boiling protection up to 129
°C (265 °F).
. Protect against rust and
corrosion.
. Help keep the proper engine
temperature.
. Let the warning lights and
gauges work as they should.
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Caution
Using coolant other than DEX-COOL® can cause premature engine, heater core, or radiator corrosion. In addition, the engine coolant could require changing sooner. Any repairs would not be covered by the vehicle warranty. Always use DEX-COOL (silicate-free) coolant in the vehicle.
What to Use Use a 50/50 mixture of clean, drinkable water and DEX-COOL coolant which will not damage aluminum parts. If using this mixture, nothing else needs to be added.
{ Warning
Adding only plain water or some other liquid to the cooling system can be dangerous. Plain water and other liquids, can boil before
(Continued)
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Vehicle Care
Warning (Continued)
Caution (Continued)
Checking Coolant (8-Cylinder Pickup Models)
the proper coolant mixture will. The vehicle's coolant warning system is set for the proper coolant mixture. With plain water or the wrong mixture, the engine could get too hot but you would not get the 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-COOL coolant.
If coolant has to be added more than four times a year, have your dealer check the vehicle cooling system.
Caution
If improper coolant mixture, inhibitors, or additives are used in the vehicle cooling system, the engine could overheat and be damaged. Too much water in the mixture can freeze and crack
(Continued)
engine cooling parts. The repairs would not be covered by the vehicle warranty. Use only the proper mixture of engine coolant for the cooling system. See Recommended Fluids and Lubricants 0 121.
Never dispose of engine coolant by putting it in the trash, or by pouring it on the ground, or pouring into sewers, streams, or bodies of water. Have the coolant changed by an authorized service center, familiar with legal requirements regarding used coolant disposal. This will help protect the environment and your health.
Checking Coolant (4-Cylinder Pickup Models) See “Engine Coolant” in owner manual.
The coolant surge tank is in the engine compartment on the passenger side of the vehicle. See Engine Compartment Overview 0 87
for location. The coolant surge tank is divided into two sides. The pressurized side (engine side) should be completely full, while the non-pressurized side (fender side) will be significantly lower, depending on the operating temperature.Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
{ Warning
Checking Coolant (Van Models)
Turning the surge tank pressure cap when the engine and radiator are hot can allow steam 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 the engine is cold, the coolant level should be at or above the MIN mark.
The coolant surge tank is near the center of the engine compartment. See Engine Compartment Overview 0 87 for location.
{ Warning
Turning the surge tank pressure cap when the engine and radiator are hot can allow steam 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.
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The vehicle must be on a level surface. When the engine is cold, the coolant level should be at the COLD FILL mark.
Adding Coolant (4-Cylinder Pickup) See “Engine Coolant” in owner manual.
Adding Coolant (8-Cylinder Pickup and Van Models)
Caution
If coolant is changed or added, always add enough to fill the system completely or engine damage 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.
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{ Warning
You can be burned if you spill coolant on hot engine parts. Coolant contains ethylene glycol and it will burn if the engine parts are hot enough. Do not spill coolant on a hot engine.
Caution
This vehicle has a specific coolant fill procedure. Failure to follow this procedure could cause the engine to overheat and be severely damaged.
{ Warning
Steam and scalding liquids from a hot cooling system can blow out and burn you badly. They are under pressure, and if you turn the coolant surge tank pressure cap — even a little — they can
(Continued)
Warning (Continued)
come out at high speed. Never turn the cap when the cooling system, including the coolant surge tank pressure cap, is hot. Wait for the cooling system and coolant surge tank pressure cap to cool if you ever have to turn the pressure cap.
If no coolant is visible in the surge tank, add coolant as follows:
1. Remove the coolant surge 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 a hiss is heard, wait for that to stop. A hiss means there is still some pressure left. 2. Keep turning the pressure cap
slowly, and remove it.
3. Slowly fill the coolant surge tank. Do not let the coolant level go above the seam in the tank until after the engine comes to operating temperature in Step 4.
4. With the coolant surge tank
pressure cap off, start the engine and let it run until the engine coolant temperature gauge indicates approximately 90 °C (195 °F). By this time, the coolant level inside the coolant surge tank may be lower. If the level is lower, slowly add more of the proper mixture to the coolant surge tank until it reaches the proper level.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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On pickup models, slowly continue to add coolant so it goes into the non-pressurized side (fender side) of the coolant surge tank until it reaches one-third of the capacity. Fill the coolant surge tank to the following levels: . At or above the MIN mark
on the pickup.
. To the COLD FILL mark on
the van.
5. Replace the pressure cap. Be
sure the pressure cap is hand-tight and fully seated. 6. Verify coolant level after the
engine is shut off and the coolant is cold. If necessary, repeat coolant fill procedure Steps 1-6.
If the coolant level is still low after having followed these steps twice, have the coolant system checked by a certified technician at the dealer for a possible leak.
Caution
Warning (Continued)
If the pressure cap is not tightly installed, coolant loss and possible engine damage may occur. Be sure the cap is properly and tightly secured.
Engine Overheating There is an engine coolant temperature gauge on the instrument cluster. See the owner manual. If Steam Is Coming from the Engine Compartment { Warning
Steam from an overheated engine can burn you badly, even if you just open the hood. Stay away from the engine if you see or hear steam coming from it. Just turn it off and get everyone away from the vehicle until it cools down.
(Continued)
Wait until there is no sign of steam or coolant before you open the hood. If you keep driving when the engine is overheated, the liquids in it can catch fire. You or others could be badly burned. Stop the engine if it overheats, and get out of the vehicle until the engine is cool.
Caution
Running the engine without coolant may cause damage or a fire. Vehicle damage would not be covered by the vehicle warranty.
If No Steam Is Coming from the Engine Compartment A Driver Information Center (DIC) message, along with a low coolant condition, can indicate a serious problem.
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If there is an engine overheat warning and the vehicle does not have a low coolant condition, and no steam is heard or seen, the problem may not be too serious. Sometimes the engine can get a little too hot when the vehicle: . Climbs a long hill on a hot day. . Stops after high-speed driving. Idles for long periods in traffic. . Tows a trailer. See “Driving on
Grades” under “Driving Characteristics and Towing Tips” in the owner manual.
If the DIC message comes on with no sign of steam, try this for a minute or so: 1.
In heavy traffic, let the engine idle in N (Neutral) while stopped. If it is safe to do so, pull off the road, shift to P (Park) or N (Neutral), and let the engine idle.
2. Turn on the heater to full hot at
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 not come back on, drive normally and have the cooling system checked for proper fill and function. If the warning continues, pull over, stop, and park the vehicle right away. If there is still no sign of steam and the vehicle is equipped with an engine driven cooling fan, push down the accelerator until the engine speed is about twice as fast as normal idle speed for at least five minutes while the vehicle is parked. If the warning is still there, turn off the engine and get everyone out of the vehicle until it cools down. The decision may be made not to lift the hood, but to get service help right away.
Battery (4 Cylinder Engine Only) Vehicles with a 4-cylinder diesel engine are equipped with an AGM (Absorbing Glass Mat) 12-volt battery. Installation of a standard 12-volt battery will result in reduced cold cranking performance. When using a battery charger on the AGM battery, use the AGM setting on the charger, if available, to limit charge voltage to 14.8 volts. Follow the charger manufacturer's instructions. See “Battery - North America” in the owner manual.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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Electrical System
Engine Compartment Fuse Block For 8-cylinder pickups and vans, see “Electrical System” in the owner manual. The 4-cylinder fuse block is shown below. For other electrical information see “Electrical System” in the owner manual. The engine compartment fuse block is in the engine compartment, on the driver side of the vehicle.
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 electrical component.
A fuse puller is available inside this fuse block.
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4-Cylinder Pickup
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
The vehicle may not be equipped with all of the fuses, relays, and features shown.
Fuses
F01
F02
F03
F04
F05
F06
F07
F08
F09
F10F11
F12
F13F14
F15Usage
Traction control module power Engine control module power A/C clutch NOx sensor ICCM Wipers Cargo lamp Fuel injectors–even Fuel injectors–odd Engine control module Water in fuel Starter Traction control module – –
Fuses
Usage
F16
F17
F18
F19
F20
F21
F22F23
F24
F25F26
F27
F28
F29
F30F31
– Front axle actuator – – Fuel pump Front blower Antilock brake system valves – Trailer Transfer case electronic control Antilock brake system pump Trailer brake control module Rear window defogger – Heated seat power 1
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Fuses
F32
F33
F34
F35
F36F37
F38
F39
F40
F41
F42
F43
F44
F45F46
Usage Heated seat power 2
Body control module 3
ICCM – Center high mounted stop lamp Right high-beam headlamp Left high-beam headlamp – SCRPM WK UP Glow plug module – Cooling fan Fuel heater Diesel exhaust fluid control Cooling fan clutchChevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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Fuses
F47
F48
F49
F50
F51
F52
F53
F54
F55
F56
F57
F58
F59
F60
F61
F62F63
Usage
Crankcase ventilation heater Fog lamps (if equipped) – Trailer park lamps Horn – – – – Washer pump – – – Mirrors defogger – Canister vent solenoid –
Fuses
F64
F65
F66
F67
F68
F69F70
F71
F72
F73
F74
F75Usage
Relays
Trailer reverse lamp Left trailer stop lamps/Turn lamps Right trailer stop lamps/Turn lamps Electric power steering – Battery regulated voltage control – – – – Generator –
K04
K05
K06
K07
K08
K09
K10
K11K12
K13K14
K15
K16
K17Usage Wiper speed Wiper control Cargo lamp Powertrain Fuel pump – – Center high mounted stop lamp Fuel heater Diesel exhaust fluid control Trailer park lamps Run/Crank Cooling fan clutch Rear window defogger
Relays
Usage
K01
K02
K03A/C clutch Starter Powertrain sensor
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
Service and Maintenance
General Information
General Information . . . . . . . . . . 115
Maintenance Schedule
Maintenance Schedule . . . . . . . 116
Recommended Fluids
Recommended Fluids and
Lubricants . . . . . . . . . . . . . . . . . . . 121
Maintenance Replacement
Parts . . . . . . . . . . . . . . . . . . . . . . . . 122
Maintenance Records
Maintenance Records . . . . . . . . 124
Service and Maintenance
115
General Information This maintenance section applies to vehicles with a diesel engine. For gasoline engine vehicles, see the maintenance schedule section in the owner manual. Your vehicle is an important investment. This section describes the required maintenance for the vehicle. Follow this schedule to help protect against major repair expenses resulting from neglect or inadequate maintenance. It may also help to maintain the value of the vehicle if it is sold. It is the responsibility 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 equipment for fast and accurate diagnostics. Many dealers have extended evening and Saturday hours, courtesy transportation, and online scheduling to assist with service needs.
Your dealer recognizes the importance of providing competitively priced maintenance and repair services. With trained technicians, your dealer is the place for routine maintenance such as oil changes and tire rotations and additional maintenance items like tires, brakes, batteries, and wiper blades.
Caution
Damage caused by improper maintenance can lead to costly repairs and may not be covered by the vehicle warranty. Maintenance intervals, checks, inspections, recommended fluids, and lubricants are important to keep the vehicle in good working condition.
The Tire Rotation and Required Services are the responsibility of the vehicle owner. It is recommended to have your dealer perform these services every 12 000 km/7,500 mi. Proper vehicle maintenance helps to
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Service and Maintenance
keep the vehicle in good working condition, improves fuel economy, and reduces vehicle emissions. Because of the way people use vehicles, maintenance needs vary. There may need to be more frequent checks and services. The Additional Required Services - Normal are for vehicles that: . Carry passengers and cargo within recommended limits on the Tire and Loading Information label. See “Vehicle Load Limits” in the owner manual.
. Are driven on reasonable road
surfaces within legal driving limits.
. Use the recommended fuel. See
Fuel for Diesel Engines 0 47.
Refer to the information in the Maintenance Schedule Additional Required Services - Normal chart. The Additional Required Services - Severe are for vehicles that are: . Mainly driven in heavy city traffic
in hot weather.
. Mainly driven in hilly or
mountainous terrain.
. Frequently towing a trailer. . Used for high speed or
competitive driving.
. Used for taxi, police, or delivery
service.
Refer to the information in the Maintenance Schedule Additional Required Services - Severe chart.
{ Warning
Performing maintenance work can be dangerous and can cause serious injury. Perform maintenance work only if the required information, proper tools, and equipment are available. If they are not, see your dealer to have a trained technician do the work. See “Doing Your Own Service Work” in the owner manual.
Maintenance Schedule
Owner Checks and Services See the owner manual for other services and intervals that may be required.
At Each Fuel Stop . Check the engine oil level. See
Engine Oil 0 92.
Engine Oil Change When the CHANGE ENGINE OIL SOON message displays, have the engine oil and filter changed within the next 1 000 km/600 mi. If driven under the best conditions, the engine oil life system may not indicate the need for vehicle service for up to a year. The engine oil and filter must be changed at least once a year and the oil life system must be reset. Your trained dealer technician 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
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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last service. Reset the oil life system when the oil is changed. See Engine Oil Life System 0 96. Required Services Every 12 000 km/7,500 mi . Check engine oil level and oil
life percentage. If needed, change engine oil and filter, and reset oil life system. See Engine Oil 0 92 and Engine Oil Life System 0 96.
. Check engine coolant level. See
Engine Coolant 0 105.
. Visually check for fluid leaks.
Inspect engine air cleaner filter. See Engine Air Cleaner/ Filter 0 101.
. Visually inspect fuel system for
damage or leaks.
. Visually inspect exhaust system
and nearby heat shields for loose or damaged parts.
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Service and Maintenance
Maintenance Schedule Additional Required Services - Normal
Perform Required Services. Check engine oil level and oil life percentage. Change engine oil and filter, if needed.
Replace engine air cleaner filter. (1)
Change automatic transmission fluid and filter. (HD 6-Speed Allison Transmission Only)
Change automatic transmission external filter. (2500/35/00 Pickup Only).
Drain and fill engine cooling system. (2)
Visually inspect accessory drive belts. (3)
Replace timing belt. (2.8L 4-Cylinder Engine)
@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
Replace fuel filter. (6.6L 8-Cylinder Engine) (4)
Replace fuel filter. (2.8L 4-Cylinder Engine) (4)
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Footnotes — Maintenance Schedule Additional Required Services - Normal (1) Or every four years, whichever comes first. If driving in dusty conditions, inspect the filter at each oil change or more often as needed. (2) Or every five years, whichever comes first. See Cooling System 0 104. (3) Or every 10 years, whichever comes first. Inspect for fraying, excessive cracking, or damage; replace, if needed. (4) Or every two years, or when the CHANGE FUEL FILTER message in the Driver Information Center (DIC) comes on, whichever comes first. The fuel filter may need to be replaced more often based on biodiesel usage, driving in climates with severe dust, off-road driving, or towing a trailer for extended periods.
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Maintenance Schedule Additional Required Services - Severe
Perform Required Services. Check engine oil level and oil life 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 accessory drive belts. (3)
Replace timing belt. (2.8L 4-Cylinder Engine)
@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
Replace fuel filter. (6.6L 8-Cylinder Engine) (4)
Replace fuel filter. (2.8L 4-Cylinder Engine) (4)
Footnotes — Maintenance Schedule Additional Required Services - Severe (1) Or every four years, whichever comes first. If driving in dusty conditions, inspect the filter at each oil change or more often as needed. (2) Or every five years, whichever comes first. See Cooling System 0 104.
(3) Or every 10 years, whichever comes first. Inspect for fraying, excessive cracking, or damage; replace, if needed. (4) Or every two years, or when the CHANGE FUEL FILTER message in the Driver Information Center (DIC) comes on, whichever comes first. The fuel filter may need to be replaced more often based on biodiesel usage, when driving in
climates with excessive dust, or when off-road driving or towing a trailer for extended periods.
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Recommended Fluids
Recommended Fluids and Lubricants The following fluids apply to vehicles with a Duramax diesel engine and/or an Allison Transmission. For other fluids not listed here, see “Recommended Fluids and Lubricants” in the owner manual. Fluids and lubricants identified below by name, part number, or specification can be obtained from your dealer.
Usage
Fluid/Lubricant
Engine Oil (2.8L 4-Cylinder Engine) Engine oil meeting the dexos2™ specification of the proper SAE viscosity
grade. AC Delco dexos2 Synthetic Blend is recommended. See Engine Oil 0 92.
Engine Oil (6.6L 8-Cylinder Engine) Engine oils with the letters CJ-4 are required for your vehicle. The CJ-4
Engine Coolant
Diesel Exhaust Aftertreatment
System
Power Steering System
designation 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. To determine the preferred viscosity for your vehicle's diesel engine, see Engine Oil 0 92. 50/50 mixture of clean, drinkable water and use only DEX-COOL® coolant. See Engine Coolant 0 105. Diesel Exhaust Fluid (GM Part No. 19286291, in Canada 88862660) or diesel exhaust fluid that meets ISO 22241-1 or displays the API Diesel Exhaust Fluid Certification Mark. GM Power Steering Fluid (GM Part No. 89021185, in Canada 89021186).
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Usage
Automatic Transmission
Fluid/Lubricant
DEXRON®-VI Automatic Transmission Fluid. Allison Transmission Only: For areas where ambient temperatures are below -40 °C (-40 °F) use Synthetic Transmission Fluid approved to Allison Transmission specification TES-295 (GM Part No. 12378515, in Canada 88900701).
Maintenance Replacement Parts Replacement parts identified below by name, part number, or specification can be obtained from your dealer.
Part
GM Part Number
ACDelco Part Number
Engine Air Cleaner/Filter
