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Chevrolet GMC Duramax 2023 Manual

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Summary of Contents for Chevrolet GMC Duramax 2023

  • Page 2: Table Of Contents

    Instruments and Controls ....3 limited to, GM, the GM logo, CHEVROLET, owner s manual. This manual, along with...
  • Page 3 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 s manual to learn about the vehicle's features and controls.

  • Page 4: Instruments And Controls

    Power Take-Off Light ....8 Information Displays Driver Information Center (DIC) ..8 Base Level Chevrolet English Cluster Shown, Metric Similar...
  • Page 5 Instruments and Controls Base Level GMC English Cluster Shown, Metric Similar...
  • Page 6 Instruments and Controls Uplevel Chevrolet English Cluster Shown, Metric Similar...

  • Page 7: Malfunction Indicator Lamp

    Instruments and Controls 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 Uplevel GMC English Cluster Shown, Metric Similar...

  • Page 8: Wait-To-Start Light

    Instruments and Controls happen if the 12-volt battery has recently Caution (Continued) been replaced or run down, or if the lead to costly repairs not covered by the vehicle has recently been serviced. vehicle warranty. This could also affect See your dealer if the vehicle will not pass the vehicle s ability to pass an Emissions or cannot be made ready for the test.

  • Page 9: Diesel Exhaust Fluid (Def) Warning

    Instruments and Controls Diesel Exhaust Fluid (DEF) The vehicle may have a Power Take-Off Fuel Filter Life Remaining : This display (PTO) light. Under normal operating shows an estimate of the fuel filter's Warning Light conditions, the PTO light will remain on remaining useful life.
  • Page 10 Instruments and Controls Engine Air Filter Life : Displays an estimate of the engine air filter s remaining useful life and the state of the system. Engine Air Filter Life 95% means 95% of the current air filter life remains. Messages will display based on the engine air filter life and the state of the system.

  • Page 11: Driving And Operating

    Driving and Operating Driving and Operating Trailer Towing Starting and Operating Trailer Towing ......30 Starting the Diesel Engine Starting and Operating Conversions and Add-Ons...
  • Page 12 Driving and Operating Starting the Engine conditions. In extremely cold Cold Weather Starting temperatures the delay will be longer. At Key Ignition Switch, if equipped Use the recommended engine oil when the the end of the delay the engine will outside temperature drops below freezing.
  • Page 13 Driving and Operating If the light does not go off, wait a few To enable or disable Elevated Idle, select Warning seconds, then try starting the engine again. Settings > Vehicle > Climate and Air See your dealer as soon as you can for a Quality >...

  • Page 14: Winter Cover

    Driving and Operating The transmission is shifted out of P (Park) Once these inputs are removed, the engine following usage guidelines will allow or N (Neutral). idle speed will slowly ramp back up to high adequate airflow for proper radiator and air idle after the normal delay, if the conditions cooler performance: The parking brake is released.
  • Page 15 Driving and Operating When the winter cover is used, the Installation (Chevrolet Pickup) 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.
  • Page 16 Driving and Operating Installation (GMC Pickup) 1. The white label must be at the top and back of the cover. 2. Starting in the middle, attach fastening 3. To remove, reverse the steps listed points as illustrated. previously.

  • Page 17: Engine Heater

    Driving and Operating 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. Always park the vehicle in a clear open area away from buildings or structures.
  • Page 18 Driving and Operating The DPF, the tailpipe, and other exhaust Under certain conditions, such as idling or Caution system components must not be altered. very short trips, the self-cleaning process has Avoid extended idling because the DPF Inspect regularly and clean any mud or dirt less efficiency and cannot be completed.
  • Page 19 Driving and Operating Manual Regeneration of Diesel Scroll through the DIC pages to find the Before starting manual regeneration, make Exhaust Cleaning menu. Depending on sure all of the following safety conditions Particulate Filter whether the vehicle has a base or uplevel are met: This feature is only available on Fleet and cluster, it may be under the Settings menu.

  • Page 20: Diesel Exhaust Fluid

    Driving and Operating If the infotainment display returns to the regeneration can be canceled at any time by Caution previous screen, then one or more of the pressing the brake pedal or by turning the Do not mix fuel with DEF, and do not put necessary safety conditions has not been engine off.
  • Page 21 Driving and Operating manual for phone numbers to assist in contacting a GM dealer. See Recommended Fluids and Lubricants 0 62. Filling the DEF Tank The blue DEF cap is behind the fuel/DEF door. Do not remove the fuel and DEF caps at the same time.
  • Page 22 Driving and Operating When fluid reaches the top of the DEF fill It may take some time while driving for the DEF has an expiration date. If the system pipe, stop filling. Do not top off the DEF vehicle to detect that DEF has been added. detects poor quality, or contaminated or tank.

  • Page 23: Exhaust Brake

    Driving and Operating Service Emission System be. Use of the exhaust brake will help The exhaust brake will be more active when maintain vehicle speed when used with in Tow/Haul Mode. If a problem occurs with the vehicle cruise control. See Cruise Control in the emission system, a DIC message displays Fuel owner s manual.

  • Page 24: Fuel Additives

    Driving and Operating Fuel Additives Caution Caution TOP TIER Detergent Diesel is highly Use of fuel that does not comply with If the vehicle is accidentally refueled with recommended for use with your vehicle. the required technical standards can lead gasoline, do not continue driving the If your area does not have TOP TIER to engine power loss, increased wear,...

  • Page 25: Biodiesel

    Driving and Operating reduce power and fuel economy. Avoid handled differently than diesel fuel. Its use Caution using severe winter grade fuel in warm or presents additional risks and may not be Do not use home-made biodiesel or home hot climates. It can result in stalling, poor appropriate in all situations.

  • Page 26: Water In Fuel

    Driving and Operating At temperatures below 0 °C (32 °F), it is Water in Fuel Troubleshooting Warning recommended to avoid using biodiesel If the WATER IN FUEL SERVICE REQUIRED blends above 5% blend. This blend may Diesel fuel containing water is still message comes on: cause fuel filter plugging, system gelling, combustible.
  • Page 27 Driving and Operating 3. Open the drain valve by turning it Recommended Caution (Continued) counterclockwise. Allow the filter to Problem Action refuel, water was pumped into the fuel drain until all of the water has been Immediately after A large amount of tank.

  • Page 28: Running Out Of Fuel

    Driving and Operating Priming the Fuel System Running Out of Fuel Prior to opening the filter and cap assembly or servicing the filter, clean the outside of There is an electric priming pump that will If the engine has stalled due to running out the cap with a clean rag to ensure no dust bring fuel to the engine and eliminate air in of fuel, try to restart it:...

  • Page 29: Filling The Tank

    Driving and Operating 4. Remove the filter element. Inspect the Warning (Continued) Warning inside of the filter cap and sealing surface. Ensure there is no dirt or debris. Fuel can spray out if the fuel cap is Fuel vapors and fuel fires burn violently Wipe clean if necessary.

  • Page 30: Filling A Portable Fuel Container

    Driving and Operating For models with dual fuel tanks, the fuel Filling a Portable Fuel Container Warning gauge shows an average of both tanks. When refueling, refuel the primary front If a fire starts while you are refueling, do Warning tank first, then add fuel to the auxiliary not remove the fill nozzle.

  • Page 31: Trailer Towing

    Driving and Operating Trailer Towing Conversions and Add-Ons If equipped, there is an available PTO switch in the auxiliary switchbank in one of the For more information, see "Trailer Towing" right side positions. Power Take-Off (PTO) in the owner's manual for the vehicle. When installing PTO aftermarket equipment, If equipped, the Power Take-Off (PTO) is a When towing at higher altitudes, engine...
  • Page 32 Driving and Operating Operator Selectable In-Cab Mode (OSIM) All PTO modes provide for engine rpm Warning control and PTO clutch control. In-cab operation only. If the key is in the ignition (Key Access) All PTO modes provide for safety interlocks OSIM is for vehicles that require both or the RKE transmitter is in the vehicle for PTO load disengagement.
  • Page 33 Driving and Operating 4. Once the PTO Standby Speed is reached, 3. When the PTO indicator light is either 8. The Remote PTO Set switch can now be use SET and +RES on the cruise control flashing or on solid, the PTO clutch will used to set the PTO Set 1 and Set 2 to reach the Set 1 or Set 2 PTO engine be activated.
  • Page 34 Driving and Operating To start remote operation in-cab: Preset Enable Conditions Operator 6. The PTO clutch will engage and the PTO Selectable In-Cab Mode (OSIM) indicator light will change to solid when 1. With the engine running, shift the the engine speed reaches the PTO vehicle into P (Park), release the brake This requires programming with the GM Standby Speed.
  • Page 35 Driving and Operating engine speed. Factory setting for the tap 7. The horn will chirp, and then engine 1. With the engine running, shift the step is 100 rpm and the setting for the starting will be automatically initiated. vehicle into P (Park), release the brake ramp rate is 148 rpm/sec.
  • Page 36 Driving and Operating The first elevated engine speed, PTO Press the brake pedal to end remote PTO 2. The parking brake must be released. Standby Speed, is intended as verification operation. The PTO clutch disengages and 3. Confirm cruise control is off. that the system is active and ready to go the engine returns to base idle speed.
  • Page 37 Driving and Operating 9. Once engaged, if additional engine speed until a minimum speed for that gear is Press on the cruise control. The engine is desired, use either the cruise control reached. Attempts to up-shift higher than L5 returns to base idle, but the PTO clutch or the accelerator pedal to temporarily will be denied by the transmission system.
  • Page 38 Driving and Operating For key access vehicles, turn the ignition engine conditions are present, a horn the GM Service Tool. PTO will disengage on and press the brake pedal. For keyless chirp warning will occur after and shift lever can be shifted from access vehicles, hold the push button start 30 60 seconds.
  • Page 39 Driving and Operating Press the PTO in-cab switch. The PTO Resume memory speed is cleared for the regeneration or cleaning will eventually plug clutch disengages and the engine returns above actions. the DPF and result in reduced power. The to base idle. The PTO indicator light will ENGINE POWER IS REDUCED Driver Although the PTO system attempts to limit turn off, indicating the PTO clutch is...
  • Page 40 Driving and Operating TAP DOWN : Press and release SET on the In-Cab Cruise Control +RES or Remote PTO ACCEL : Press and hold +RES on the cruise cruise control to reduce the engine speed by Set 2 Switch control to increase the rpm by 148 rpm/sec decrements of 100 rpm.
  • Page 41 Driving and Operating Programmable Parameters Factory Setting Minimum Value Maximum Value PTO Option Configuration VEHICLE STATIONARY, PRESET VEHICLE STATIONARY, PRESET SPEED SPEED VEHICLE STATIONARY, VARIABLE SPEED VEHICLE MOBILE, VARIABLE SPEED PTO Control In-Cab PTO Mode In-Cab PTO Mode, Remote PTO Mode, Operator In-Cab Selectable Mode (OSIM) Type of Set Switch Operation...
  • Page 42 Driving and Operating Programmable Parameters Factory Setting Minimum Value Maximum Value Set Low Fuel Level for Engine Shutdown Engine Run Time with PTO Active ENABLED DISABLED ENABLED Timer Engine Run Time while PTO Is 420 min 10 min 3480 min Active PTO Max.
  • Page 43 Driving and Operating Programmable Parameters Factory Setting Minimum Value Maximum Value Maximum Remote Potentiometer 100% Threshold Remote Set Switch Transition to SET SPEED 1 STANDBY SPEED, SET SPEED 1, or SET SPEED 2 Low Voltage (<33% of Ignition Voltage) Remote Set Switch Transition to PTO STANDBY STANDBY SPEED, SET SPEED 1, or SET SPEED 2 Open State (>33% of Ignition, and...
  • Page 44 Driving and Operating Programmable Parameters Factory Setting Minimum Value Maximum Value Engine Speed Tap Step Menu ENABLED DISABLED ENABLED (In Stationary Variable and Mobile) Remote Set Switch Speed Control DISABLED DISABLED ENABLED Remote Throttle Speed Control DISABLED DISABLED ENABLED Remote Engine Start DISABLED DISABLED ENABLED...
  • Page 45 Driving and Operating PTO, the PTO indicator light will turn on, a manual regeneration if driving then turn off after one second. Under conditions such as extended slow speed, normal operating conditions, the PTO stop-and-go traffic, extended idles, short indicator light will remain on throughout the drive cycles, or stationary PTO operation PTO operating cycle.

  • Page 46: Vehicle Care

    Vehicle Care Vehicle Care General Information Aftermarket Engine Performance Enhancement Products and Modifications Accessories and Modifications General Information Some aftermarket engine performance products and modifications promise a way Accessories and Modifications ..45 Adding non-dealer accessories or making to increase the horsepower and torque modifications to the vehicle can affect...

  • Page 47: Vehicle Checks

    Vehicle Care Vehicle Checks Engine Compartment Overview...

  • Page 48: Engine Oil

    Vehicle Care 1. Remote Negative ( ) Terminal Engine Oil Warning 2. Remote Positive (+) Terminal To ensure proper engine performance and The engine oil dipstick handle may be 3. Battery long life, careful attention must be paid to hot; it could burn you. Use a towel or engine oil.
  • Page 49 Vehicle Care When to Add Engine Oil Caution (Continued) 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 46 for the location of the engine oil fill cap. If the oil is below the cross-hatched area at Be sure to add enough oil to put the level the tip of the dipstick and the engine has...

  • Page 50: Engine Oil Life System

    Vehicle Care Viscosity Grade When it is very cold, below 18 °C (0 °F), use dispose of clothing or rags containing used SAE 5W-40 to improve cold starting. These engine oil. See the manufacturer's warnings Use SAE 15W-40 viscosity grade engine oil. numbers on the oil container show its about the use and disposal of oil products.

  • Page 51: Engine Air Cleaner/Filter

    Vehicle Care When to Change Engine Air Filter 4. Press the thumbwheel or the reset stem remove the dust valve from the front intake to confirm the reset. air duct and clean out any debris if When the Driver Information Center (DIC) necessary.
  • Page 52 Vehicle Care To inspect and replace the filter: Warning 1. Disconnect the wiring harness electrical If part replacement is necessary, the part connector (3) from the air cleaner/filter must be replaced with one of the same housing cover (2). part number or with an equivalent part. 2.

  • Page 53: Cooling System (Engine)

    Vehicle Care Let the warning lights and gauges work Caution Warning as they should. If the air cleaner/filter is off, dirt can Do not touch heater or radiator hoses, What to Use easily get into the engine, which could or other engine parts. They can be very damage it.
  • Page 54 Vehicle Care The coolant surge tank (2) is in the engine Caution (Continued) Warning compartment on the driver side of the to the engine cooling system and the vehicle. See Engine Compartment Overview Steam and scalding liquids from a hot vehicle, which would not be covered by 0 46 for location.

  • Page 55: Cooling System

    Vehicle Care 2. Keep turning the pressure cap slowly, 5. Replace the pressure cap. and remove it. Be sure the pressure cap is locked. 6. Verify coolant level after the engine is shut off and the coolant is cold. If necessary, repeat coolant fill procedure Steps 1 6.
  • Page 56 Vehicle Care Low Temperature Cooling Circuit Coolant requirements regarding used coolant Warning (Continued) disposal. This will help protect the The low temperature cooling circuit cooling environment and your health. the wrong mixture, the engine could get system in the vehicle is filled with DEX-COOL too hot but there would not be an Checking Coolant engine coolant mixture.

  • Page 57: Engine Overheating

    Vehicle Care Adding Coolant If the DIC message comes on with no sign Caution of steam, try this for a minute or so: If the coolant level in the low temperature Do not run the engine if there is a leak 1.

  • Page 58: Engine Fan

    Vehicle Care If the Action Required - Idle Vehicle To Cool Never leave occupants in the vehicle, and Interactions with Manual Regen Engine DIC message displays, do not turn always take the keys and lock the doors if If the system has determined that the the engine off.

  • Page 59: Electrical System

    Vehicle Care functioning properly. The fan will slow down Danger when additional cooling is not required and the clutch partially disengages. Fuses and circuit breakers are marked with their ampere rating. Do not exceed This fan noise may be heard when starting the specified amperage rating when the engine.

  • Page 60: Appearance Care

    Vehicle Care Appearance Care Fuses Usage Powertrain Sensor (LD) Exterior Care See the owner s manual for additional Diesel Exhaust Fluid exterior care information. Control Caution Fuel Heater Water sprayed into or on the air intake Smart Sensors box in the engine compartment may SCRPM (LD)/Powertrain damage the air filter or electrical Sensor (HD)

  • Page 61: Service And Maintenance

    Service and Maintenance Service and Maintenance General Information Your dealer recognizes the importance of providing competitively priced maintenance This maintenance section applies to vehicles and repair services. With trained technicians, General Information with a diesel engine. For gasoline engine your dealer is the place for routine General Information .
  • Page 62 Service and Maintenance Additional Required Services filter life system after the engine air filter Warning is replaced. See Engine Air Filter Life Every 12 000 km (7,500 mi) System 0 49. Performing maintenance work can be Check engine oil level and oil dangerous and can cause serious injury.
  • Page 63 Service and Maintenance Recommended Fluids, Lubricants, and Parts Recommended Fluids and Lubricants The following fluids apply to vehicles with a Duramax diesel engine. For other fluids not listed here, see Recommended Fluids and Lubricants in the owner s manual. Fluids and lubricants identified below by name or specification, including fluids or lubricants not listed here, can be obtained from your dealer. Usage Fluid/Lubricant Automatic Transmission...
  • Page 64 Service and Maintenance 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 84554703 A3248C Fuel Filter 13539108 TP1015 Engine Oil Filter 12707246 PF63 Use only the specified filters.
  • Page 65 Service and Maintenance 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 boxes provided. Retain all maintenance receipts. Date Odometer Reading Serviced By Services Performed...

  • Page 66: Technical Data

    Technical Data Technical Data Vehicle Data Capacities and Specifications ... 66 Engine Drive Belt Routing ....67...
  • Page 67 Technical Data Vehicle Data Capacities and Specifications The following approximate capacities are given in metric and English conversions. See Recommended Fluids and Lubricants 0 62. Capacities Application Metric English Engine Cooling System* 28.5 L 30.1 qt Low Temperature Cooling Circuit Cooling System* 1.9 L 2.0 qt Diesel Exhaust Fluid (DEF) Tank**...
  • Page 68 Technical Data Engine Drive Belt Routing Fan Drive Belt Routing (Secondary/Auxiliary Drive) 6.6L 8-Cylinder Engine (Single Generator) 6.6L 8-Cylinder Engine (Dual Generator)

  • Page 69: Index

    Index Index Accessories and Modifications ... . 45 Diesel Exhaust Fluid ......19 Cleaner/Filter, Engine .
  • Page 70 Index Exhaust Diesel Fluid ......19 Heater Parking Exhaust Brake ......22 Engine .
  • Page 71 Index Top Tier Fuel ......22 Towing Trailer ........30 Trailer Towing .

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