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Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . 2
In Brief . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Instruments and Controls . . . . . . . . 9
Driving and Operating . . . . . . . . . . 28
Vehicle Care . . . . . . . . . . . . . . . . . . . . 85
Service and Maintenance . . . . . 115
Technical Data . . . . . . . . . . . . . . . . 125
Index . . . . . . . . . . . . . . . . . . . . 129Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
Introduction
Introduction The names, logos, emblems, slogans, vehicle model names, and vehicle body designs appearing in this manual including, but not limited to, GM, the GM logo, CHEVROLET, GMC, the CHEVROLET and GMC Truck Emblems, SILVERADO, SIERRA, DENALI, EXPRESS, SAVANA, COLORADO, CANYON, and Duramax are trademarks and/or service marks of General Motors LLC, its subsidiaries, affiliates, or licensors. For vehicles first sold in Canada, substitute the name “General Motors of Canada Limited” for GMC and Chevrolet Motor Division wherever it appears in this manual.
This manual describes features that may or may not be on the vehicle because of optional equipment that was not purchased on the vehicle, model variants, country specifications, features/applications that may not be available in your region, or changes subsequent to the printing of this owner manual. Refer to the purchase documentation relating to your specific vehicle to confirm the features. This manual contains information that pertains to the operation of your diesel engine. It also contains your Diesel Maintenance Schedule. The sections in this manual correspond to the sections in your owner manual. This manual, along with your owner manual, will assist you in the proper use and maintenance of your vehicle.
Keep this manual in the vehicle for quick reference.
Canadian Vehicle Owners A French language manual can be obtained from your dealer, at www.helminc.com, or from: Propriétaires Canadiens On peut obtenir un exemplaire de ce guide en français auprès du concessionnaire ou à l'adresse suivante: Helm, Incorporated Attention: Customer Service 47911 Halyard Drive Plymouth, MI 48170
USALitho in U.S.A. Part No. 23133527 B Second Printing
©2015 General Motors LLC. All Rights Reserved.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
Introduction
Using this Supplement This supplement contains information specific to the unique components of the vehicle. It does not explain everything you need to know about the vehicle. Read this supplement along with the owner manual to learn about the vehicle's features and controls. Index A good place to look for what you need is the Index in back of this supplement. It is an alphabetical list of what is in the supplement, and the page number where you will find it.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
Introduction
2 NOTES
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
In Brief
Initial Drive Information
Transmission . . . . . . . . . . . . . . . . . . . . 5
Performance and Maintenance Engine Oil Life System . . . . . . . . . . 6
Diesel Particulate Filter . . . . . . . . . . 6
Diesel Exhaust Fluid . . . . . . . . . . . . 7In Brief
fluid approved to Allison Transmission® specification TES-295. See Recommended Fluids and Lubricants 0 121 and Automatic Transmission Fluid 0 96.
Adaptive Shift Controls (8-Cylinder Pickup Models Only) The shift quality of a new vehicle may not be ideal because the Adaptive Shift Control process may not have determined the best settings for a particular shift or condition. Shift quality will improve with continued driving.
Low Traction Mode (8-Cylinder and 4-Cylinder Pickup Models Only) Low Traction Mode aids in vehicle acceleration on slippery road surfaces such as ice or snow. By selecting 2 (Second) using Range Selection Mode while at a stop, the transmission will limit torque to the drive wheels to prevent slippage.
Initial Drive Information
Transmission
Cold Operation (8-Cylinder Pickup Models Only) When temperatures are very cold, the transmission will prevent certain operations to protect against damage. The information below shows shift range availability based on transmission oil temperature: . All shift ranges available at −25 °
C (−13 °F) or above.
. 2 (Second) and 3 (Third) shift
ranges only at −35 °C (−31 °F) to −25 °C (−13 °F).
. 2 (Second) shift range only at
−35 °C (−31 °F) or lower.
Torque converter clutch operation will also be prevented when air or transmission oil temperatures are below certain levels. For areas where ambient temperatures are below −40 °C (−40 °F), use synthetic transmission
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
In Brief
Heater Performance Mode (8-Cylinder Pickup Models Only) When cold weather conditions are detected, the transmission raises part throttle upshift points after the 1 (First) to 2 (Second) upshift to increase engine speed. This feature shortens engine and cab warm up times. When the transmission is in this mode, upshifts may be delayed. This is normal and does not indicate an operational problem.
Four-Wheel Drive (8-Cylinder Pickup Models Only) When operating in 4 ↓ (Four-Wheel-Drive Low), there is a very deep gear reduction. The resulting shifts will feel exaggerated.
Performance and Maintenance
Engine Oil Life System The engine oil life system calculates engine oil life based on vehicle use and displays the CHANGE ENGINE OIL SOON message when it is time to change the engine oil and filter. The oil life system should be reset to 100% only following an oil change. See “Engine Oil Life System” in the owner manual.
Diesel Particulate Filter The Duramax engine is equipped with a Diesel Particulate Filter (DPF) that will filter or trap particulates. The DPF is under the vehicle in the exhaust system. Depending on a number of factors monitored by the engine computer, the DPF will need to be cleaned of accumulated solids. When a cleaning is needed, the engine computer will initiate a cleaning action by warming the exhaust gas temperature. This feature has been
designed to operate automatically, with limited operator involvement or awareness. Noise may be heard at low speeds when the emission controls are active. This is normal. Cleaning the DPF (Exhaust Filter) While the DPF cleaning is automatically controlled by the engine computer, the vehicle will need to operate continuously until the message is no longer displayed. See Diesel Particulate Filter Messages 0 23. Cleaning occurs most effectively above 48 km/h (30 mph). If the vehicle is returned to idle during the cleaning process, the driver may notice a slightly different sound or a slightly elevated engine idle speed. This is normal. No action is required on the part of the driver during a regular DPF cleaning. See Diesel Particulate Filter 0 38.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
Special DPF Driver Messages If the vehicle is used for numerous short trips or extended slow-speed operation, the engine computer may not be able to adequately heat up the exhaust system to clean the DPF effectively. The engine computer has been designed to continuously monitor the condition of the DPF. When the engine computer detects that the DPF is nearly full of particulates and that the vehicle is not being operated in a manner that would allow effective automatic DPF cleaning, the Driver Information Center (DIC) will display a message. See Diesel Particulate Filter Messages 0 23. If the vehicle continues to be driven in a manner that prevents effective DPF cleaning, the DPF will become plugged with particulates. If this occurs, the engine computer will turn on the service engine soon light in the instrument cluster and the DIC will display the message ENGINE POWER IS REDUCED. See Diesel Particulate Filter 0 38
and Engine Power Messages 0 22.Fuel
Use Ultra Low Sulfur Diesel Fuel (ULSD) Use ULSD only. The emission control hardware used on the vehicle may be damaged by using fuel with high sulfur levels. Use only fuel that is dispensed from pumps bearing the ULSD label.
Do Not Use Low Sulfur Diesel Fuel (LSD) Do not use fuel that is dispensed from pumps bearing the LSD label.
Do Not Use Non-Highway Fuel Fuel labeled as off road or non-highway is typically very high in sulfur content and will damage the emission control system. Non-highway fuel is not intended for use in on-highway vehicles and does not have the fuel properties needed by the DPF-equipped Duramax diesel. In addition: . Use the correct engine oil.
In Brief
. Do not add gasoline to
diesel fuel.
. Do not modify the induction or
exhaust systems.
See Fuel for Diesel Engines 0 47
and Engine Oil 0 92.Diesel Exhaust Fluid Diesel Exhaust Fluid (DEF) is used with diesel engines to reduce the amount of regulated emissions produced. The DEF system must be maintained for the vehicle to run properly. DEF is not a fuel additive. For reflling instructions, see Diesel Exhaust Fluid 0 39. DEF should not be mixed with or added to diesel fuel. DEF freezes when exposed to temperature below −11 °C (12 ° F).
Locating Diesel Exhaust Fluid DEF can be purchased at a Chevrolet or GMC dealer. It can also be purchased at authorized vehicle and truck dealerships. Additionally, some diesel truck fueling stations or retailers may have DEF for purchase. For
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
In Brief
vehicles with an active OnStar® subscription, OnStar can help to locate a DEF retailer. See “Customer Assistance Offices” in the owner manual for phone numbers to assist you in contacting a GM dealer. See Recommended Fluids and Lubricants 0 121. As the DEF tank becomes low on fluid, warnings begin with approximately 1 600 km (1,000 mi) of remaining range. These warnings will increase as the tank becomes empty. Once the tank is empty, the vehicle speed will be limited. If there is an issue with the quality of the fluid or the exhaust fluid system, warnings will be displayed in the Driver Information Center (DIC). See Diesel Exhaust Fluid 0 39.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
Instruments and Controls
Diesel Exhaust Fluid
Messages . . . . . . . . . . . . . . . . . . . . 23
Diesel Particulate Filter
Messages . . . . . . . . . . . . . . . . . . . . 23
Service Vehicle Messages . . . . . 24
Starting the VehicleMessages . . . . . . . . . . . . . . . . . . . . 24
Vehicle Speed Messages . . . . . . 24Vehicle Personalization
Vehicle Personalization . . . . . . . . 26
Instruments and Controls
Warning Lights, Gauges, and Indicators
Instrument Cluster . . . . . . . . . . . . . 10
Fuel Gauge . . . . . . . . . . . . . . . . . . . . 16
Engine Oil Pressure Gauge . . . . 17
Malfunction Indicator Lamp(Check Engine Light) . . . . . . . . . 18
Wait-to-Start Light . . . . . . . . . . . . . 20
Diesel Exhaust Fluid (DEF)Warning Light . . . . . . . . . . . . . . . . 20
Power Take-Off Light
(8-Cylinder Pickup Models) . . . 21
Information Displays
Driver Information
Center (DIC) . . . . . . . . . . . . . . . . . 21
Vehicle Messages
Vehicle Messages . . . . . . . . . . . . . 22
Brake System Messages . . . . . . 22
Engine Cooling SystemMessages (8-Cylinder Pickups and Vans) . . . . . . . . . . . . . . . . . . . . 22
Engine Oil Messages . . . . . . . . . . 22
Engine Power Messages . . . . . . 22
Fuel System Messages . . . . . . . . 22Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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Instruments and Controls
Warning Lights, Gauges, and Indicators
Instrument Cluster
English Base Level 4-Cylinder Pickup Shown, Metric Similar
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
Instruments and Controls
11
English Uplevel 4-Cylinder Pickup Shown, Metric Similar
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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Instruments and Controls
English Base Level 8-Cylinder Pickup Shown, Metric Similar
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
Instruments and Controls
13
English Uplevel 8-Cylinder Pickup Shown, Metric Similar
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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Instruments and Controls
English 8-Cylinder Denali Pickup Shown, Metric Similar
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
Instruments and Controls
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English Van Shown, Metric Similar
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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Instruments and Controls
See the owner manual for warning lights and gauges not listed in this supplement.
Fuel Gauge
English Base 4-Cylinder Pickup
English 8-Cylinder Pickup Models
Shown, Uplevel Similar
Metric Base 4-Cylinder Pickup
Shown, Uplevel Similar
Metric 8-Cylinder Pickup Models
Metric Van Models
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
Instruments and Controls
17
It takes a little more or less fuel to fill up than the fuel gauge indicated. For example, the gauge may have indicated the tank was half full, but it actually took a little more or less than half the tank's capacity to fill the tank.
. The gauge moves a little while
turning a corner or speeding up. . The gauge does not go back to
E (Empty) when the ignition is turned off.
None of these indicate a problem with the fuel gauge. For information on how to fill the fuel tank, see Filling the Tank 0 62.
Engine Oil Pressure Gauge
4-Cylinder Pickup Models See “Oil Pressure” under “Driver Information Center (DIC)” in the owner manual.
Metric 8-Cylinder Pickup Models
English 8-Cylinder Pickup 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 (Empty) before the vehicle is out of fuel, but the vehicle's fuel tank should be filled soon. An arrow on the fuel gauge indicates the side of the vehicle the fuel door is on. Listed are four situations customers may experience with the fuel gauge: . At the gas station, the fuel pump shuts off before the gauge reads F (Full).
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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Instruments and Controls
Caution
Lack of proper engine oil maintenance can damage the engine. Driving with the engine oil low can also damage the engine. The repairs would not be covered by the vehicle warranty. Check the oil level as soon as possible. Add oil if required, but if the oil level is within the operating range and the oil pressure is still low, have the vehicle serviced. Always follow the maintenance schedule for changing engine oil.
The engine oil pressure gauge reads in kPa (kilopascals) or psi (pounds per square inch) when the engine is running. Oil pressure may vary with engine speed, outside temperature, and oil viscosity. If readings are outside the normal operating range, the low oil pressure message may display on the Driver Information Center (DIC), or for vehicles without DIC the oil pressure light will come on. If the oil
pressure message or light comes on, check the oil level immediately. Do not operate the engine with the oil pressure warning light on or an ENGINE OIL LOW ADD OIL message displayed.
Malfunction Indicator Lamp (Check Engine Light) This light is part of the vehicle’s emission control on-board diagnostic system. If this light is on while the engine is running, a malfunction has been detected and the vehicle may require service. The light should come on to show that it is working when the ignition is in ON/RUN with the engine not running. See “Ignition Positions” in the owner manual. This light may also come on when the system has detected a problem with the Diesel Exhaust Fluid (DEF) management system. See Diesel Exhaust Fluid 0 39.
Metric Van Models
English Van Models
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
Malfunctions are often indicated by the system before any problem is noticeable. 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 work as well, the fuel economy may be lower, and the vehicle may not run smoothly. This could lead to costly repairs that might not be covered by the vehicle warranty.
Instruments and Controls
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Caution
Modifications to the engine, transmission, exhaust, intake, or fuel system, or the use of replacement tires that do not meet the original tire specifications, can cause this light to come on. This could lead to costly repairs not covered by the vehicle warranty. This could also affect the vehicle’s ability to pass an Emissions Inspection/ Maintenance test. See Accessories and Modifications 0 85.
When the light is on, a malfunction has been detected. Diagnosis and service may be required. Poor fuel quality can cause inefficient engine operation and poor driveability, which may go away once the engine is warmed up. If this occurs, change the fuel brand. It may require at least one full tank of the proper fuel to turn the light off. See Fuel for Diesel Engines 0 47.
If the light remains on, see your dealer. Emissions Inspection and Maintenance Programs If the vehicle requires an Emissions Inspection/Maintenance test, the test equipment will likely connect to the vehicle's Data Link Connector (DLC).
The DLC is under the instrument panel to the left of the steering wheel. Connecting devices that are not used to perform an Emissions Inspection/Maintenance test or to service the vehicle may affect vehicle operation See “Add-On Electrical Equipment” in the owner manual. See your dealer if assistance is needed.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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Instruments and Controls
The vehicle may not pass inspection if: . The light is on when the engine
is running.
. The light does not come on
when the ignition is in ON/RUN with the engine not running.
. Critical emission control systems
have not been completely diagnosed. If this happens, the vehicle would not be ready for inspection and might require several days of routine driving before the system is ready for inspection. This can happen if the 12-volt battery has recently been replaced or run down, or if the vehicle has been recently serviced.
See your dealer if the vehicle will not pass or cannot be made ready for the test.
Wait-to-Start Light
Diesel Exhaust Fluid (DEF) Warning Light
If the wait-to-start light comes on, the glow plug system is required and operating. Wait until the light turns off before starting the engine. This light may not come on in warm temperatures. The fast warm-up glow plug system makes the wait-to-start light stay on for a shorter amount of time than most diesel engines. See Starting the Diesel Engine 0 28.
This light, a Driver Information Center (DIC) message, and a chime come on when there is an issue with the Diesel Exhaust Fluid. See Diesel Exhaust Fluid Messages 0 23 for information on the specific message displaying with the light. If the DEF level has not been corrected, the light will continue to flash when the vehicle is started. The vehicle's speed may also be limited. Also see Diesel Exhaust Fluid 0 39.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
Power Take-Off Light (8-Cylinder Pickup Models)
Non-Denali Pickups
The vehicle may have a Power Take-Off (PTO) light. Under normal operating conditions, the PTO light will remain on throughout the PTO operating cycle. If all 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 71.
Instruments and Controls
21
When the remaining fuel filter life is low, the CHANGE FUEL FILTER message will appear on the display. Change the fuel filter as soon as possible. Fuel Filter Life Reset : Reset the Fuel Filter Life Remaining display after each fuel filter change. It will not reset itself. Also, be careful not to reset the display at any time other than when the fuel filter has just been changed because it cannot be reset accurately until the next fuel filter change. The fuel filter life will change to 100% when the system has been reset. To reset the system, press and hold the set/reset button, or the trip odometer reset stem if there are no DIC buttons, for two seconds while Fuel Filter Life Remaining is displayed on the DIC.
Information Displays
Driver Information Center (DIC) The DIC is in the instrument cluster. The DIC comes on when the ignition is on. A diesel vehicle may have the following additional DIC menu items: Exhaust Fluid Level : The Diesel Exhaust Fluid (DEF) level will be displayed as either OK, XX%, or LOW. When LOW appears on the display, add DEF as soon as possible. See Diesel Exhaust Fluid 0 39. Fuel Filter Life Remaining : This display shows an estimate of the fuel filter's remaining useful life. If 90% Fuel Filter Life Remaining is displayed, it means 90% of the current fuel filter life remains. The fuel filter life system will alert when to change the fuel filter on a schedule consistent with your driving conditions.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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Instruments and Controls
Vehicle Messages The Driver Information Center (DIC) will display warning messages if a problem is detected. Pressing the select button or the set/reset button for vehicles with DIC buttons, or the trip odometer reset stem for vehicles without DIC buttons, will acknowledge some current warning or service messages. Other messages are more urgent and cannot be cleared from the display until the issue is corrected. The following are some additional messages that the diesel vehicle can display.
Brake System Messages
EXHAUST BRAKE ON/OFF This message displays when the exhaust brake is on or off.
Engine Cooling System Messages (8-Cylinder Pickups and Vans)
COOLANT LEVEL LOW ADD COOLANT This message will appear on the DIC if the engine coolant level is low. Adding coolant to the coolant recovery tank will clear the message. For pickups only, remember to check the coolant in both sides of the reservoir. See “Engine Coolant” in the owner manual.
Engine Oil Messages
ENGINE OIL LOW ADD OIL This message only displays when the ignition key is turned to ON/RUN and the oil level in the vehicle is low. Check the oil level and correct it as necessary. Let the vehicle cool or warm up and cycle the ignition to be sure this message clears. This message clears itself after 10 seconds, until the next ignition cycle. See Engine Oil 0 92.
Engine Power Messages
ENGINE POWER IS REDUCED A computer monitors the operation of the engine. If the ENGINE POWER IS REDUCED message comes on while driving, there will be a reduction in performance and acceleration. Take the vehicle in for service.
Fuel System Messages
CHANGE FUEL FILTER This message will appear on the DIC for 10 seconds when a fuel filter change is required. See Fuel Filter Replacement 0 58. WATER IN FUEL SERVICE REQUIRED This message will come on to warn you if there is water in the diesel fuel system. For more information on how this message works, see Water in Fuel 0 53.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
EXHAUST FLUID EMPTY REFILL NOW This message will be displayed when the DEF tank is empty. This message may be accompanied by other messages that provide more information. EXHAUST FLUID QUALITY POOR SEE OWNERS MANUAL NOW This message displays when the DEF is of poor quality or the wrong fluid was added. This message may be accompanied by other messages that provide more information.
Diesel Exhaust Fluid Messages For more information on these messages, see “Exhaust Fluid Low” or “Exhaust Fluid Quality Poor” in Diesel Exhaust Fluid 0 39. EXHAUST FLUID RANGE: XXXX KM (MI) When the Diesel Exhaust Fluid (DEF) level is getting low, the range will be displayed in either kilometers or miles. It is normal for the EXHAUST FLUID RANGE to vary based on vehicle and environmental driving conditions. This message first displays at approximately 1 600 km (1,000 mi) of range remaining. EXHAUST FLUID LOW SPEED LIMITED SOON When the DEF range is less than 120 km (75 mi) this message will be displayed.
Instruments and Controls
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Diesel Particulate Filter Messages
CLEANING EXHAUST FILTER CONTINUE DRIVING (4-Cylinder Pickups and Uplevel 8-Cylinder Pickups) or DIESEL PARTIC FILTER IS FULL CONTINUE DRIVING (Base Level 8-Cylinder Pickups) or CLEANING EXHAUST FILTER KEEP DRIVING UNTIL MESSAGE IS CLEARED (Vans) This message will appear on the DIC when an exhaust particulate filter cleaning is required. To clean the filter, drive the vehicle above 50 km/h (30 mph) until the warning message goes off. This will take about 30 minutes. If the filter is not cleaned, the malfunction indicator lamp will come on and the ENGINE POWER IS REDUCED message will be displayed. Vehicle performance will be limited. See Diesel Particulate Filter 0 38.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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Instruments and Controls
CLEANING EXHAUST FILTER MUST CONTINUE DRIVING (4-Cylinder Pickups) It is important to keep driving to clean the exhaust filter. This will take about 30 minutes.
Service Vehicle Messages
CHANGE TIMING BELT (4–Cylinder Pickup Only) This message displays when scheduled maintenance on the timing belt is required. See your dealer for service. SERVICE EXHAUST FLUID SYSTEM SEE OWNERS MANUAL NOW This message displays when the DEF system needs service. This message may be accompanied by other messages that provide more information. See “Service Exhaust Fluid System” in Diesel Exhaust Fluid 0 39.
SERVICE EMISSION SYSTEM SEE OWNERS MANUAL NOW This message displays when the emission system needs service. Take the vehicle to your dealer. See “Service Emission System” in Diesel Exhaust Fluid 0 39.
Starting the Vehicle Messages
ELEVATED IDLE OFF This message will appear when the elevated idle feature has been turned off. See “Elevated Idle” under Starting the Diesel Engine 0 28. ELEVATED IDLE ON This message will appear when the elevated idle feature has been turned on. See “Elevated Idle” under Starting the Diesel Engine 0 28. FAST IDLE ON (Van Models Only) If the vehicle has this feature, this message displays when the fast idle feature is on. See “Fast Idle Control
(8-Cylinder Pickups and Vans Only)” under Starting the Diesel Engine 0 28.
Vehicle Speed Messages For more information on these messages, see Diesel Exhaust Fluid 0 39. XXX KM (MI) UNTIL 105 KM/H (65 MPH) MAX SPEED This message will be displayed along with other messages. These messages include EXHAUST FLUID EMPTY REFILL NOW, EXHAUST FLUID QUALITY POOR, SERVICE EMISSION SYSTEM, or SERVICE EXHAUST FLUID SYSTEM. The vehicle speed will be limited to 105 km/h (65 mph) when the countdown is over. XXX KM (MI) UNTIL 88 KM/H (55 MPH) MAX SPEED This message will be displayed along with other messages. These messages include EXHAUST FLUID EMPTY REFILL NOW, EXHAUST FLUID QUALITY POOR, SERVICE EMISSION SYSTEM, or SERVICE
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
Instruments and Controls
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SPEED LIMITED TO 7 KM/ H (4 MPH) This message will be displayed along with other messages. These messages include EXHAUST FLUID EMPTY REFILL NOW, EXHAUST FLUID QUALITY POOR, or SERVICE EXHAUST FLUID SYSTEM. When this message is displayed, the vehicle speed is being limited to 7 km/h (4 mph).
EXHAUST FLUID SYSTEM. The vehicle speed will be limited to 88 km/h (55 mph) when the countdown is over. XXX KM (MI) UNTIL 7 KM/H (4 MPH) MAX SPEED This message will be displayed along with other messages. These messages include EXHAUST FLUID EMPTY REFILL NOW, EXHAUST FLUID QUALITY POOR, or SERVICE EXHAUST FLUID SYSTEM. The vehicle speed will be limited to 7 km/h (4 mph) when the countdown is over. TRANSITIONING TO XX KM/H (XX MPH) MAX SPEED This message will be displayed along with other messages. These messages include EXHAUST FLUID EMPTY REFILL NOW, EXHAUST FLUID QUALITY POOR, SERVICE EMISSION SYSTEM, or SERVICE EXHAUST FLUID SYSTEM. When this message is displayed, the end of the countdown has been reached and the vehicle speed is being limited.
SPEED LIMITED TO 105 KM/H (65 MPH) This message will be displayed along with other messages. These messages include EXHAUST FLUID EMPTY REFILL NOW, EXHAUST FLUID QUALITY POOR, SERVICE EMISSION SYSTEM, or SERVICE EXHAUST FLUID SYSTEM. When this message is displayed, the vehicle speed is being limited to 105 km/h (65 mph). SPEED LIMITED TO 88 KM/H (55 MPH) This message will be displayed along with other messages. These messages include EXHAUST FLUID EMPTY REFILL NOW, EXHAUST FLUID QUALITY POOR, SERVICE EMISSION SYSTEM, or SERVICE EXHAUST FLUID SYSTEM. When this message is displayed, the vehicle speed is being limited to 88 km/h (55 mph).
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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Instruments and Controls
Vehicle Personalization Use the audio system controls to access the personalization menus for customizing vehicle features. The following features may be available on some vehicles with a diesel engine. See “Vehicle Personalization” in the owner manual for additional vehicle personalizations.
System Controls 1. Turn the ignition to ON/RUN
without the engine running and place the vehicle in P (Park). To avoid excessive drain on the battery, turn the headlamps off.
2. Press the MENU knob on the
radio.
3. Turn the MENU knob to scroll to SETTINGS, then press the MENU knob.
4. Turn the MENU knob to scroll
to Vehicle, then press the MENU knob.
5. Turn the MENU knob to scroll
to the desired menu, then press the MENU knob.
If equipped, these features may be selected using the touchscreen. Vehicle Select and the following may display: . Climate and Air Quality . Power Take-Off (PTO) Climate and Air Quality Select and the following may display: . Elevated Idle
Elevated Idle This allows the feature to be turned on and off. See “Elevated Idle” in Starting the Diesel Engine 0 28. Select Off or On.
Power Take-Off (PTO) (If Equipped) There may be additional features that can be customized for the PTO. See Power Take-Off (PTO) 0 71. See your dealer to enable these features.
Feature Settings Menu Items Press the MENU knob to select the desired setting. . Standby Speed . Set 1 Speed . Set 2 Speed . Tap Step Speed . Shutdown Time Turn the MENU knob to scroll to one of the following menu selections:
PTO STANDBY SPEED This feature allows for modifying the PTO Standby Speed. Turn the MENU knob to the desired setting. Press the MENU knob to select the desired setting.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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27
Turn the MENU knob to the desired PTO Tap Step Speed setting. Press the MENU knob to select the desired setting.
PTO SHUTDOWN TIME This feature is available if the vehicle is configured for Stationary Preset or Stationary Variable PTO, and allows the selection of the PTO shutdown time. Turn the MENU knob to the desired PTO Shutdown Time setting. Press the MENU knob to select the desired setting.
PTO SET 1 SPEED This feature is available if the vehicle is configured for Stationary Preset PTO, and allows the selection of the PTO set 1 speed. Turn the MENU knob to the desired PTO Standby Set 1 setting. Press the MENU knob to select the desired setting.
PTO SET 2 SPEED This feature is available if the vehicle is configured for Stationary Preset PTO, and allows the selection of the PTO set 2 speed. Turn the MENU knob to the desired PTO Standby Set 2 setting. Press the MENU knob to select the desired setting.
PTO TAP STEP SPEED This feature is available if the vehicle is configured for Stationary Variable or Mobile PTO, and allows the selection of the PTO tap step speed.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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Driving and OperatingStarting and Operating
Starting the Diesel Engine . . . . . 28
Winter Cover . . . . . . . . . . . . . . . . . . . 31
Engine Heater . . . . . . . . . . . . . . . . . 35
Fuel Operated Heater (FOH) . . . 37
Parking over ThingsThat Burn . . . . . . . . . . . . . . . . . . . . 37
Diesel Particulate Filter
Diesel Particulate Filter . . . . . . . . 38
Diesel Exhaust Fluid
Diesel Exhaust Fluid . . . . . . . . . . . 39
Brakes
Exhaust Brake . . . . . . . . . . . . . . . . . 46
Fuel
Fuel for Diesel Engines . . . . . . . . 47
What Fuel to Use inThe U.S. . . . . . . . . . . . . . . . . . . . . . 48
What Fuel to Use in Canada
and Mexico . . . . . . . . . . . . . . . . . . . 51
Cold Weather Operation . . . . . . . 53
Water in Fuel . . . . . . . . . . . . . . . . . . 53
Running Out of Fuel . . . . . . . . . . . 57
Fuel Filter Replacement . . . . . . . 58Filling the Tank . . . . . . . . . . . . . . . . 62
Filling a Portable FuelContainer . . . . . . . . . . . . . . . . . . . . . 63
Starting and Operating
Towing
Trailer Towing . . . . . . . . . . . . . . . . . . 64
Conversions and Add-Ons
Power Take-Off (PTO) . . . . . . . . . 71
Starting the Diesel Engine The diesel engine starts differently than a gasoline engine.
Caution
If the steering wheel is turned until it reaches the end of its travel, and is held in that position while starting the vehicle, damage may occur to the hydraulic power steering system and there may be loss of power steering assist.
Move the shift lever to P (Park) or N (Neutral). To restart the engine when the vehicle is already moving, use N (Neutral) only.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
Caution
Caution
Do not try to shift to P (Park) if the vehicle is moving. If you do, you could damage the transmission. Shift to P (Park) only when the vehicle is stopped.
If the wait-to-start light stays on after starting the vehicle, the vehicle may not run properly. Have the vehicle serviced right away.
Starting the Engine 1. Turn the ignition key to
2.
ON/RUN. Observe the wait-to-start light. See Wait-to-Start Light 0 20. This light may not come on if the engine is warm. If the wait-to-start light is on, wait until this light goes off. Then turn the ignition key to START. When the engine starts, let go of the key. The engine has a fast warm-up glow plug system. The wait-to-start light will illuminate for a much shorter time than most diesel engines, due to the rapid heating of the glow plug system.
3.
If the engine does not start after 15 seconds of cranking, turn the ignition switch to LOCK/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 fuel, follow the steps in Running Out of Fuel 0 57. When the engine is cold, let it run for a few minutes before driving. This lets oil pressure build up. The engine will sound louder when it is cold.
Driving and Operating
29
Cold Weather Starting (Diesel Engine) Use the recommended engine oil when the outside temperature drops below freezing. See Engine Oil 0 92. When the outside temperature drops below –18 °C (0 °F), use of the engine coolant heater is recommended. If you experience longer cranking times, notice an unusual amount of exhaust smoke, or are at higher elevations (over 2 135 m or 7,000 ft), you may use the engine coolant heater. See Engine Heater 0 35. See Fuel for Diesel Engines 0 47 for information on what fuel to use in cold weather. If the Diesel Engine Will Not Start If the vehicle runs out of fuel, see Running Out of Fuel 0 57. If the vehicle is not out of fuel, and the engine will not start: Turn the ignition key to ON/RUN. After the wait-to-start light goes off, turn the ignition key to START.
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If the light does not go off, wait a few seconds, then try starting the engine again. See your dealer as soon as you can for a starting system check. If the light comes on and then goes off and you know the batteries are charged, but the engine still will not start, the vehicle needs service. If the light does not come on when the engine is cold, the vehicle needs service. If the batteries do not have enough charge to start the engine, see “Battery” in the owner manual. Check that the correct engine oil has been used and changed at appropriate intervals. If the wrong oil is used, the engine may be harder to start. Be sure you are using the proper fuel for existing weather conditions. See Fuel for Diesel Engines 0 47. If the engine starts, runs a short time, then stops, the vehicle needs service.
{ 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 cause serious personal injury.
Engine Idle Variations Under certain conditions the engine idle speed can vary or be elevated. Change in idle speed is normal and does not indicate a problem. Normal conditions that can raise idle speed are low voltage, DPF regeneration, air conditioning compressor loads, and engine warmup. These speeds can range from approximately 600
to 1000 rpm. Elevated Idle The engine has a cold temperature high idle feature which elevates the engine idle speed from base idle to 1050 to 1100 rpm for pickup modelsor 1200 rpm for van models when outside temperatures are below 0 °C (32 °F), and the engine coolant temperature is below 65 °C (150 °F). This feature enhances heater performance by raising the engine coolant temperature faster. To turn this feature on or off on pickup models, see Vehicle Personalization 0 26. On van models, this feature can be turned on and off using the DIC buttons. When the engine is started, it will slowly ramp up to the high idle speed after a delay of a few seconds up to approximately two minutes. For this method to work properly there must be no throttle or brake pedal faults. The engine idle speed will return to normal once the following conditions are met: . Engine coolant temperature
reaches 65 °C (150 °F).
. Air intake temperature reaches
0 °C (32 °F).
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
The high idle speed will be temporarily interrupted and the engine speed will return to normal if any of the following conditions occur: . The brake pedal is applied. . The accelerator pedal is
pressed.
. The transmission is shifted out
of P (Park) or N (Neutral). . Vehicle speed is detected. Once these inputs are removed, the engine idle speed will slowly ramp back up to high idle after the normal delay, if the conditions for engine coolant temperature and air intake temperature are still met. Fast Idle Control (8-Cylinder Pickups and Vans 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 transmission is in P (Park)
or N (Neutral).
. The vehicle speed is about
0 km/h (0 mph).
. The cruise control Set switch is pressed and released for Preset Fast Idle Speed (1200 rpm). Fast Idle control will be disabled when one or more of the following conditions occur: . The cruise control Set switch is
pressed and released. See “Cruise Control” in the owner manual.
. The cruise control Cancel switch
is pressed.
. The brake pedal is pressed. . The transmission is shifted out
of P (Park) or N (Neutral).
. The parking brake is released. . The vehicle speed is not
0 km/h (0 mph).
On vans, when fast idle is active, a FAST IDLE ON message will be displayed in the DIC. See Starting the Vehicle Messages 0 24.
Driving and Operating
31
Winter Cover
4-Cylinder Pickups Do not use a winter cover on a 4-cylinder pickup.
8-Cylinder Pickups and Vans Only If equipped, the winter cover can be used to enhance heater performance in extremely cold conditions below −18 °C (0 °F). The winter cover installs over the grille and restricts airflow to the engine compartment. For vehicles that did not come with a winter cover, a GM winter cover can be purchased. See your dealer for additional information. When the winter cover is in use, the Heater, Ventilation, and Air Conditioning AUTO mode may not function properly. Use the manual settings for comfort. Usage Guidelines The winter cover should only be used while operating the vehicle in extremely cold temperatures or in heavy snow for extended periods. In
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Driving and Operating
these temperatures, the vehicle does not need a large amount of air to properly cool the engine. When more airflow is required to cool the vehicle, the winter cover should not be used. The following usage guidelines will allow adequate airflow 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 use the winter cover if a
snow plow is mounted on the truck.
installation of the cover is best performed when the winter cover is warm. Installation (Chevrolet Pickup)
1. The white label must be at the
top and back of the cover.
. Do not cover the opening in the
front bumper.
. Do not modify the cover. The winter cover does not cover some sections of the front of the vehicle to provide enough airflow.
. When the winter cover is used,
the outside air temperature display may not function properly.
. Keep the underside of the winter
cover as clean as possible. Remove monthly or as necessary and clean away dust and debris.
. Use only a mild soap to clean. Do not use harsh soap, strong detergents, or vinyl protectant/ sealant type products as they may damage the special finish. Allow the winter cover to dry completely before reinstalling.
Installation Instructions When first trying to fit the cover, it may appear to be undersized but will stretch during installation to ensure a tight fit. The initial
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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Installation (GMC Pickup)
1. The white label must be at the
top and back of the cover.
2. Starting in the middle, attach fastening points as illustrated.
3. To remove, reverse the steps
listed previously.
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Driving and Operating
Installation (Van Models) 1. Open the hood and secure it
with the prop rod.
2. Starting in the middle, attach fastening points as illustrated.
3. To remove, reverse the steps
listed previously.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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5. To remove the winter cover,
reverse the steps listed previously.
Engine Heater If equipped, the engine coolant heater can provide easier starting in cold weather conditions at or below −18 °C (0 °F). The engine coolant heater should be plugged in at least four hours before starting. To Use the Engine Heater 1. Turn off the engine.
2. Hook the five J-clips to the
bottom edge of the grille.
3. Hook the top center J-clip by
the hood latch.
4. Attach the metal hooks, one
each at the top corners.
8-Cylinder Pickups and Vans
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Driving and Operating
4. Plug it into 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 electrical utility receptacle that is protected by a ground fault detection function. An ungrounded outlet could cause an electric shock.
. Use a weatherproof,
heavy-duty, 15 amp-rated extension cord if needed. Failure to use the recommended extension cord in good operating condition, or using a damaged heater or extension cord, could make
(Continued)
Warning (Continued)
it overheat and cause a fire, property damage, electric shock, and injury.
. Do not operate the vehicle
with the heater cord permanently attached to the vehicle. Possible heater cord and thermostat damage could occur.
. While in use, do not let the
heater cord touch vehicle parts or sharp edges. Never close the hood on the heater cord.
. Before starting the vehicle,
unplug the cord, reattach the cover to the plug, and securely fasten the cord. Keep the cord away from any moving parts.
5. Before starting the engine, be
sure to unplug and store the cord as it was before to keep it away from moving engine parts, and prevent damage.
4-Cylinder Pickups
2. Open the hood and unwrap the
electrical cord. The cord is in the engine compartment, on the passenger side near the battery, for 8-cylinder pickups and vans. The cord is in the engine compartment, on the driver side behind the battery, for 4-cylinder pickups.
3. Clean and dry the heater cord
and connector ends. Check the heater cord for damage. If it is damaged, do not use it. See your dealer for a replacement. Inspect the cord for damage yearly.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
The length of time the heater should remain plugged in depends on the outside temperature. You may wish to use 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 coolant heater should remain plugged in for at least eight hours. Be sure to store the cord before starting the engine. See Fuel for Diesel Engines 0 47 for information on what fuel to use in cold weather.
Caution
Do not use the engine heater continuously. This could damage the engine heater and may cause a fire. Always unplug the engine heater after use.
Fuel Operated Heater (FOH)
For vans with an FOH, it will enhance heater performance and will reduce the amount of time it takes to warm the inside of the vehicle in cold conditions below or equal to 4 °C (39 °F). The FOH is installed on the frame rail on the driver side of the vehicle and uses diesel fuel to heat the engine coolant, which warms up the passenger cabin air. The FOH will turn on if all of the following conditions exist: . Outside air temperature is below
or equal to 4 °C (39 °F).
Driving and Operating
37
. Fuel level is greater or equal to
12.5% of the total fuel tank volume.
. The engine is running. . Coolant temperature is less than
70 °C (158 °F).
Parking over Things That Burn
{ Warning
Things that can burn could touch hot exhaust parts under the vehicle and ignite. Do not park over papers, leaves, dry grass, or other things that can burn.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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Driving and Operating
Diesel Particulate Filter The 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 exhaust cooler mixes air with the exhaust to lower the temperature before it leaves the tailpipe. The DPF, the tailpipe, or other exhaust 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 air enters the cooler. The DPF will clean itself as part of normal operation. Several factors including fuel consumed, hours of engine operation, and miles driven are monitored by the Engine Control Module (ECM). The self-cleaning occurs approximately once per tank of fuel.
Caution
Permanent damage can occur to the DPF or related components if the required Ultra Low Sulfur Diesel (15 ppm sulfur maximum) or low ash CJ-4 engine oil is not used. This damage would not be covered by the vehicle warranty.
Under certain driving conditions, such as stop-and-go traffic, the filter cannot clean itself. A message comes on when the DPF is dirty and needs to perform a self cleaning. See Diesel Particulate Filter Messages 0 23. For the filter to clean itself, the vehicle must be driven above 50 km/h (30 mph) until the message goes off. This will take about 30 minutes. See Diesel Particulate Filter Messages 0 23.
{ Warning
During DPF self cleaning or during extended idling in P (Park), the exhaust system and exhaust gases are very hot. Things that burn could touch hot exhaust parts under the vehicle and ignite. You or others could be burned. Do not park, or idle for an extended period of time, near or over papers, leaves, dry grass, or other things that can burn. Keep the exhaust area clear of material that could ignite or burn. See Parking over Things That Burn 0 37 for more information.
Caution
Extended idle should be avoided because the DPF system is not capable of self cleaning at idle. During extended idle operation, monitor the instrument cluster telltale lights and Driver
(Continued)
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
Vehicles with DPF have specific fuel and engine oil requirements. See What Fuel to Use in The U.S. 0 48
or What Fuel to Use in Canada and Mexico 0 51 and Engine Oil 0 92 for more information on those requirements. Extended idling in P (Park) can cause exhaust parts and gases to become very hot. Keep the exhaust area clear of material that could ignite or burn. See Parking over Things That Burn 0 37. If equipped with a Power Take-Off (PTO), monitor the instrument cluster for lights related to the DPF. See Accessories and Modifications 0 85 for important information if you are considering adding accessories or modifying the vehicle.Caution (Continued)
Information Center for messages and take appropriate indicated action. Continued idling with the warning light/message on could cause irreversible damage to the DPF requiring repair and possible replacement that might not be covered by the vehicle warranty.
You will also notice a change in the exhaust sound and engine idle speed. This is normal. See Vehicle Messages 0 22. If you continue to drive with the DPF warning message on and the exhaust filter is not cleaned as required, the malfunction indicator lamp and the ENGINE POWER IS REDUCED message will come on and dealer service is necessary. See Malfunction Indicator Lamp (Check Engine Light) 0 18 and Engine Power Messages 0 22.
Driving and Operating
39
Diesel Exhaust Fluid
{ Warning
Diesel Exhaust Fluid (DEF) is corrosive. Do not allow it to come in contact with your skin, eyes, or the finished surfaces of the vehicle. If exposed, it may cause skin and eye irritation. Wear skin and eye protection when handling. Inhalation may cause irritation to the upper respiratory tract. For more safety and storage information, see the label of the Diesel Exhaust Fluid container.
DEF is used with diesel engines to reduce the amount of regulated emissions produced. The fluid level in the DEF tank must be maintained for the vehicle to run correctly. In cold conditions it is normal for DEF to freeze. For DEF tank capacity see Capacities and Specifications 0 126.
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Driving and Operating
Locating Diesel Exhaust Fluid DEF can be purchased at a Chevrolet or GMC dealer. It can also be purchased at authorized vehicle and truck dealerships. Additionally, some diesel truck fueling stations or retailers may have DEF for purchase. For vehicles with an active OnStar subscription, OnStar can help to locate a DEF retailer. See “Customer Assistance Offices” in the owner manual for phone numbers to assist in contacting a GM dealer. See Recommended Fluids and Lubricants 0 121.
Filling the DEF Tank
Caution
Use only DEF that is GM approved, or fluid containing the API certified or ISO 22241 label. The use of other fluids could damage the system, requiring costly repairs that will not be covered by the vehicle warranty.
The fill tube location for chassis-cab and cutaway vans finished by an upfitter will vary. Check the upfitter manual.
It is recommended to fill the DEF tank. For DEF tank capacity see Capacities and Specifications 0 126. Do not overfill the DEF tank. When fluid reaches the top of the fill pipe, stop filling. If you spill DEF on the vehicle while filling the tank, rinse the area with water and wipe the surface with a damp cloth.
DEF Fill - 8-Cylinder Pickups
For 8–Cylinder pickups, the DEF fill is under the hood, on the passenger side, at the back of the engine compartment. The DEF cap is blue. In certain cold conditions, it is possible to find some frozen DEF in the DEF fill pipe opening. If this condition prevents the filling of a DEF tank, place the vehicle in a warm garage overnight.
DEF Fill - Van Model Shown, 4-Cylinder Pickups Similar
For vans and 4-cylinder pickups, the DEF fill is behind the fuel fill door. The DEF cap is blue, and the diesel cap is green.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
Exhaust Fluid Low A full DEF tank will last for several thousand kilometers (miles), depending on vehicle usage. As the DEF level drops, warnings will automatically be displayed in the DIC. DEF level status is available on the DIC under the vehicle Information button. See “Exhaust Fluid Level” in Driver Information Center (DIC) 0 21. To avoid vehicle speed limitations, the DEF tank should be refilled at the first opportunity after a low warning indication. If DEF is added before the EXHAUST FLUID EMPTY REFILL NOW message appears, it may take several km/mi for the DIC message to update. If the vehicle speed has been limited and DEF has been added, it may take up to 30 seconds after engine start with the vehicle stopped for the EXHAUST FLUID EMPTY REFILL NOW message to clear. If the vehicle is driven prior to the DIC message clearing, the vehicle speed will still be limited.
If the DIC message clears while driving, the speed limitation will be removed gradually. If DEF is added under freezing conditions, additional time may be required to remove speed limitations and may require less fluid to fill the DEF tank. The following actions describe strategies required by the U.S. Environmental Protection Agency (EPA) and the California Air Resource Board (CARB). The DEF messages relate to these strategies. The EXHAUST FLUID RANGE message first displays at approximately 1600 km (1000 mi). This message appears again at approximately 500 km (300 mi) of remaining range before the exhaust fluid tank becomes empty. See the following list for approximate remaining volume when 1600 km (1000 mi) warning appears: . Colorado/Canyon - 3.8 L
(1.0 gal)
Driving and Operating
41
. Silverado/Sierra/Sierra Denali -
5.7 L (1.5 gal)
. Express/Savana - 5.7 L (1.5 gal) Below 500 km (300 mi) of range remaining, these messages will appear every time the vehicle is started. If these warnings are ignored and the DEF tank becomes empty, the DIC message displays: . EXHAUST FLUID EMPTY
REFILL NOW - 644 KM (400 MI) UNTIL 105 KM/H (65 MPH) MAX SPEED.
. For emergency vans with RPO YF2 or emergency pickups with RPO ANM, EXHAUST FLUID EMPTY REFILL NOW - 998 KM (620 MI) UNTIL 105 KM/H (65 MPH) MAX SPEED.
The displayed mileage will decrease as driving continues. A warning light also comes on. When the mileage countdown is zero, the DIC message EXHAUST FLUID EMPTY REFILL NOW - TRANSITIONING TO 105 KM/H (65 MPH) MAX SPEED displays.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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Driving and Operating
A warning light and a chime also come on. Vehicle speed will be reduced to a maximum speed limit of 105 km/h (65 mph). After the transition to 105 km/h (65 mph) is complete, the DIC message displays: . EXHAUST FLUID EMPTY
REFILL NOW - SPEED LIMITED TO 105 KM/H (65 MPH) – 120 KM (75 MI) UNTIL 89 KM/H (55 MPH) MAX SPEED.
. For emergency vans with RPO YF2 or emergency pickups with RPO ANM, EXHAUST FLUID EMPTY REFILL NOW - SPEED LIMITED TO 105 KM/H (65 MPH) – 933 KM (580 MI) UNTIL 89 KM/H (55 MPH) MAX SPEED.
The displayed mileage will decrease as driving continues. A warning light and a chime also come on. When the mileage countdown is zero, the DIC message EXHAUST FLUID EMPTY REFILL NOW - TRANSITIONING TO 89 KM/H (55 MPH) MAX SPEED displays.
A flashing warning light and a chime also come on. Vehicle speed will be reduced to a maximum speed limit of 89 km/h (55 mph). After the transition to 89 km/h (55 mph) is complete, the DIC message EXHAUST FLUID EMPTY REFILL NOW - SPEED LIMITED TO 89 KM/H (55 MPH) – 120 KM (75 MI) UNTIL 7 KM/H (4 MPH) MAX SPEED displays. The displayed mileage will decrease as driving continues. A flashing warning light and a chime also come on. When the mileage countdown is zero, the DIC message EXHAUST FLUID EMPTY REFILL NOW - TRANSITIONING TO 7 KM/H (4 MPH) MAX SPEED displays. A flashing warning light and a chime also come on. Vehicle speed will be reduced to a maximum speed limit of 7 km/h (4 mph). After the transition to 7 km/h (4 mph) is complete, the DIC message EXHAUST FLUID EMPTY REFILL NOW - SPEED LIMITED TO 7 KM/H
(4 MPH) displays. A flashing warning light and a chime also come on. It is recommended to fill the DEF tank. At least 7.6 L (2 gals) of DEF need to be added to release the vehicle from the speed limitation. See Capacities and Specifications 0 126. See Diesel Exhaust Fluid Messages 0 23, Diesel Exhaust Fluid (DEF) Warning Light 0 20, and Recommended Fluids and Lubricants 0 121.
Exhaust Fluid Quality Poor Use only DEF that is GM approved, or fluid containing the API certified
