2021 GMC Sierra 1500 Technical Service Bulletins

1,454 technical service bulletins (TSBs) are on record for the 2021 GMC Sierra 1500. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 10204458Nov 29, 2021Equipment, Visibility (wipers, defrost, mirrors). This Preliminary information communicates an issues will low or poor heater performance on the drivers side. Dealers are to inspect the HVAC temperature door linkage and if ok replace the heater core.
• 10205591Nov 19, 2021Engine, Equipment, Engine cooling. This service bulletin provides information on Engine Oil Consumption Guidelines.
• 10205590Nov 19, 2021Engine cooling, Equipment, Electrical system. TGhis bulletin advises the technician of a possible coolant hose that might be kinked causing the customers concern.
• 10205586Nov 19, 2021Engine, Equipment, Engine cooling. This bulletin advises the technician of a possible location that a leak may occur from the SCT pipe.
• 10205563Nov 18, 2021Engine cooling, Equipment. THis technical bulletin provides a procedure to perform a cooling system flush to remove possible debris from the cooling system pipes.
• 10205548Nov 17, 2021Equipment, Back-over prevention (rear camera). This service bulletin provides information for customers/dealers/technicians on Normal Rearview Camera Display Operation - Flashing Diamond - Spot - or UFO like image on Rear View Camera Display.
• 10205577Nov 12, 2021Engine cooling, Equipment. This service bulletin provides a service procedure to correct a customer concern of a Malfunction Indicator Lamp (MIL) Illuminated - DTC P3075 Set.
• 10205738Nov 8, 2021Wheels, Tires. This service bulletin provides information for dealers/technicians on Tire/Wheel Characteristics (Vibration, Balance, Shake, Flat Spotting) of GM Original Equipment Tires.
• 10205552Nov 8, 2021Electrical system, Engine cooling. This technical bulletin provides repair information to correct a customer concern of Engine Wire Harness Chafing.
• 10205539Nov 8, 2021Engine cooling, Equipment. This service bulletin provides information for dealers/technicians and customers on steam/vapor coming from the front grille or radiator area.
• 10205737Nov 5, 2021Equipment. This service bulletin provides a vibration analysis worksheet the technician can use in conjunction with the appropriate Vibration Analysis-Road testing procedure, when diagnosing vibration concerns.
• 10204441Nov 3, 2021Forward collision avoidance, Lane departure. This Preliminary information communicates an issue with adaptive cruise and lane keep assist inoperative due to an internal issue with the front view windshield camera. Dealers are to replace the camera.
• 10204437Nov 2, 2021Engine. This Preliminary Information communication advises the technician with a tip when the vehicle stops running after it has been idling for 2.5 hours. This is normal operation of the vehicle built with regular production code BTM and without Regular Production Option Code AVF. If the vehicle was built with regular production code BTM and AVF only has a 1 hour idle time.
• 10205739Nov 1, 2021Electrical system. This service bulletin provides technicians with information on available BCM calibrations to restore bulb outage detection on vehicles produced by a second stage manufacturer (Upfitter), and/or turn signals flash fast after factory box removed.
• 10202406Sep 27, 2021Equipment. This Preliminary information communicates A customer vehicle may have a concern of a P0300 setting after bulletin 21-NA-154 has been performed. Unknown Engineering is looking it to this concern
• 10202401Sep 22, 2021Transmission and drivetrain. This preliminary information bulletin instructs to technicians to check the trigger wheel for interfering with the timing chain, and adding a shim to the camshaft position sensor.
• 10202392Sep 14, 2021Equipment. This Preliminary information communicates multiple vehicle issues caused by an aftermarket device and it gives dealership information where to inspect for this device.
• 10201328Aug 25, 2021Suspension, Wheels, Tires, Brakes. This Preliminary information communicates Some customers may comment when coasting to a stop between 15-13 mph there is a shudder type sensation that can also be described as rumble strips in the vehicle that felt when coming to a stop. Upon inspection of concern technician will be able to easily duplicate the concern every time between those speeds. Currently the cause is unknown Engineering is looking it to this…
• 10201326Aug 24, 2021Electrical system. This Preliminary Information communication provides information to the technician how to repair vehicles that Instrument Panel Cluster, Radio, and Heater-Vent-Air Conditioning display blanks out, Bluetooth phone or Pandora connection dropped, the radio station or volume changes when operating the snow plow. Please advise the customer that engineering is aware of this concern and working on this issue.
• 10205057Aug 20, 2021Fuel system. This service bulletin advises the technician on what to do if the DEF pump has been replaced and perform a leak test to prime the pump.
• 10201323Aug 20, 2021Engine. This Preliminary information communicates to the dealers information related to a hot idle tick noise from the engine. Testing to isolate the noise to the upper engine / valve train and repair recommendations related to valve train components.
• 10201321Aug 19, 2021Brakes, Electrical system. This Preliminary information communicates information to diagnose DTC C056D or C056E.
• 10201318Aug 19, 2021Electrical system, Equipment. This Preliminary information communicates a condition where the Video Processing Control Module is not able to be programmed to the vehicle. This PI offeres a couple workarounds while Engineering evaluates the concern.
• 10201316Aug 18, 2021Equipment, Electrical system. This Preliminary information communicates a possible SIM issue with vehicles in the middle east.
• 10201315Aug 18, 2021Engine. This Preliminary information communicates diagnostics to the dealer involving a vehicle shudder concern caused by the camshaft actuator system that can be mistaken for a transmission issue.
• 10201313Aug 16, 2021Electrical system. This Preliminary information communicates diagnostic tips when trying to root cause a SES MIL with DTC's B2B0D and B2B0E. Main cause is aftermarket electrical devices spliced into the ignition main fuses.
• 10201311Aug 16, 2021Engine, Electrical system. This preliminary information bulletin instructs to technicians to check the trigger wheel for interfering with the timing chain, and adding a shim to the camshaft position sensor.
• 10201310Aug 11, 2021Equipment. This Preliminary Information communication provides information to the technician about installing General Motors Accessory parts/kits. Technicians should refer to Service Information for information regarding most accessories. Technicians may also contact PARTECH and/or the Techline Customer Support Center for additional support.
• 10201307Aug 9, 2021Electrical system. This Preliminary information communicates a condition where the Video Processing Control Module is not able to be programmed to the vehicle. This PI offeres a couple workarounds while Engineering evaluates the concern.
• 10205059Aug 6, 2021Electrical system. This warranty administration bulletin provides policy information on the requirements for battery testing and warranty replacements.
• 10205048Aug 6, 2021Engine. This service bulletin provides graphics, information and guidelines for engine component wear to assist service personnel as a guideline to perform necessary engine repairs and prevent unnecessary engine replacement.
• 10201306Aug 6, 2021Engine. This preliminary information bulletin instructs to technicians to check the trigger wheel for interfering with the timing chain, and adding a shim to the camshaft position sensor.
• 10201264Jul 30, 2021Engine. This Preliminary information communicates A customer vehicle may have a concern of a P0300 setting after bulletin 21-NA-154 has been performed. Unknown Engineering is looking it to this concern
• 10201253Jul 22, 2021Air bags, Other or unknown, Electrical system. This Preliminary Information communication provides information to the technician on how to diagnose and repair vehicle that may have a "Check Trailer Wiring" or "Service Trailer Brake System? message on the Driver Information Center when a trailer is connected to the vehicle. Diagnostic Trouble Code C1114 set in the Chassis Control Module. Chassis Control Module has to determine the type of trailer brake system…
• 10201177Jul 22, 2021Electrical system. This Preliminary Information communication provides information to the technician on how to diagnose and repair vehicle that may have a "Check Trailer Wiring" or "Service Trailer Brake System? message on the Driver Information Center when a trailer is connected to the vehicle. Diagnostic Trouble Code C1114 set in the Chassis Control Module. Chassis Control Module has to determine the type of trailer brake system…
• 10201252Jul 21, 2021Air bags, Transmission and drivetrain. This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3060, and/or B3935. Technician should not replace any parts for this concern. If unable to duplicate the concern ask if the customer uses any Radio Frequency…
• 10201251Jul 21, 2021Electrical system. This Preliminary information communicates additional information on how a LIN bus operates and diagnostic tips when working on a LIN bus.
• 10201248Jul 19, 2021Equipment, Engine. This Preliminary information communicates that a vehicle may exhibit a misfire condition resulting in misfire codes P0300-P308. Upon diagnosis it may be discovered the lifter has come apart. It is recommended to replace the lifter guide and the four lifters.
• 10201182Jul 14, 2021Suspension. This PI communicates that engineering is investigating a correction to a noise originating in the front of the vehicle.
• 10200193Jul 1, 2021Equipment, Transmission and drivetrain. Service Update. On certain vehicles, the thrust washer was not installed on the transfer case reduction carrier assembly. Dealers are to replace the transfer case.
• 10201300Jun 30, 2021Engine. This Preliminary information communicates Some customers may comment that the SES lamp is illuminated or was Illuminated and turned off. During inspection Technician may notice DTC P0300 (Engine Misfire Detected) active or stored in history. Customers may also comment that the check engine light was flashing while driving up a long grade or smooth road with steady throttle. This condition may be caused by the P0300…
• 10200147Jun 29, 2021Engine, Electrical system. This technical bulletin provides repair information to correct a customer concern of Engine Wire Harness Chafing.
• 10200149Jun 28, 2021Equipment, Visibility (wipers, defrost, mirrors). This service bulletin provides information for dealers/technicians on glass ultraviolet (UV) Ray protection and tint percentage.
• 10200176Jun 24, 2021Equipment, Steering. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to a rubbing type noise heard while turning the steering wheel.
• 10200187Jun 23, 2021Engine cooling, Electrical system. Emission Recall. General Motors has decided to conduct a voluntary emissions recall involving certain vehicles equipped with a performance air intake system (LPO RVK or 5W7). The Engine Control Module (ECM) may not have been programmed with the calibrations appropriate for the performance air intake system installed on the engine in these vehicles. Dealers will reprogram the ECM.
• 10200175Jun 21, 2021Equipment, Electrical system. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the trailer light message and/or trailer disconnect message on the infotainment screen.
• 10200151Jun 21, 2021Equipment, Exterior lighting. This service bulletin provides information for dealers/technicians on Exterior Lamp Condensation and Water Leaks and Replacement Guidelines.
• 10200140Jun 21, 2021Engine cooling, Electrical system. This service bulletin provides a repair procedure to correct a customer concern of a Malfunction Indicator Lamp (MIL) Illuminated - DTC P3055 Set.
• 10200138Jun 21, 2021Back-over prevention (rear camera), Electrical system. This technical bulletin provides repair information to correct a customer concern of Crooked Rear View Camera Guideline Image on Radio Display.
• 10201290Jun 18, 2021Electrical system. This Preliminary information communicates a condition where the Video Processing Control Module is not able to be programmed to the vehicle. This PI offeres a couple workarounds while Engineering evaluates the concern.

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