2021 GMC Sierra 2500 Technical Service Bulletins

1,061 technical service bulletins (TSBs) are on record for the 2021 GMC Sierra 2500. 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.

• 10209980Mar 31, 2022Engine cooling. This service bulletin provides service information to technicians on guidelines to replace Oil Cooler, Oil Cooler Lines and Oil Tank if the engine was replaced where large amounts of debris has flowed throughout the oiling system.
• 10209974Mar 31, 2022Electrical system, Body and structure, Equipment. This technical bulletin provides repair information to correct a customer concern of Diagnostic Tips For Park Assist Off Message / Unwanted Or False Park Assist Alerts / No DTCs.
• 10209977Mar 30, 2022Equipment. This service bulletin provides information for replacement parts traceability (RPT) process to aid in tracking part replacements.
• 10210348Mar 28, 2022Electrical system. This Preliminary Information communication provides information to the technician about a no start or another concern after swapping an Engine Control Module or other modules from one vehicle to another. The Global Architecture electrical system associated with these vehicles does not allow controller swaps between vehicles.
• 10209743Mar 25, 2022Wheels, Equipment. This bulletin updates the position of General Motors on refinishing fully color painted aluminum wheels with base paint. GM has established a new process for the way that refinishing under GM Warranty will be handled (U.S. ONLY).
• 10209905Mar 24, 2022Electrical system, Transmission and drivetrain. This technical bulletin provides repair information to correct a customer concern of Service 4WD Message illuminated on Driver Information Center (DIC), DTCs C118D, C119B and/or C119C set.
• 10210341Mar 23, 2022Engine cooling, Transmission and drivetrain. This Preliminary information communicates to the dealer technician that if the vehicle's engine coolant reservoir has transmission fluid in it or if Glycol it found in the transmission fluid the dealer should replace the Automatic Transmission Fluid Cooling Exchanger. The dealer should refer to bulletin 08-07-30-035 for the recommended components that should be replaced in the transmission and to flush the engine…
• 10209921Mar 22, 2022Engine cooling. This service bulletin provides service information on new torque specification and installation procedure for ACDelco Spin-On Oil Filters.
• 10209747Mar 22, 2022Equipment. This bulletin provides information for use on a Product Assistance Claim (PAC), which is formerly known as a Product Allegation Resolution (PAR) claim.
• 10209734Mar 22, 2022Equipment, Fuel system. This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive.
• 10210334Mar 17, 2022Engine cooling, Engine. This Preliminary information communicates the possibility of dtc p06DD due to low or no oil pressure immediately following engine oil and filter change due to oil filter and main oil gallery being drained or empty.
• 10209136Mar 10, 2022Equipment, Body and structure. This informational bulletin provides technicians and dealership personnel with spray-in bed liner general information and repair procedures.
• 10210325Mar 9, 2022Engine, Electrical system, Engine cooling. This Preliminary information communicates to the dealership technician a change made to the wire harness and reductant control module for the Diesel Exhaust Fluid tank connector.
• 10210321Mar 7, 2022Wheels, Tires. This Preliminary Information communication provides information to the technician about changing the tire and wheel size on vehicles. General Motors will only support a tire calibration for tires that have been sized, tested and designed for the vehicle in question and its applications. Technician should not use the information that is provided by the antilock braking system tire size selection.
• 10210319Mar 7, 2022Equipment. This Preliminary information communicates information on how dealers can contact the supplier for Associated Accessories offered through GM.
• 10209258Mar 7, 2022Equipment, Visibility (wipers, defrost, mirrors), Electrical system. This technical bulletin provides repair information to correct a customer concern of 360 Camera Views go Blank with Tailgate Removed.
• 10210314Mar 2, 2022Transmission and drivetrain. This Preliminary information communicates to the dealer a condition with the throttle body that may illuminate the service engine soon light, cause the engine to run rough and/or display reduced engine power message. Dealers are instructed to replace the throttle body assembly and install a grounding wire from the throttle body to the valve cover to prevent future failures.
• 10210311Mar 2, 2022Electrical system. This Preliminary information communicates an issue with the battery goes dead and provides diagnostics tips on inspecting the LIN bus.
• 10209121Mar 1, 2022Electrical system, Forward collision avoidance, Lane departure. This technical bulletin provides repair information to correct a customer concern of Service Front Camera Message on the Driver Information Center (DIC).
• 10208990Feb 22, 2022Brakes. This Preliminary information communicates that the service 4wd message related to C119E can be diagnosed and repaired.
• 10214228Feb 21, 2022Equipment. This service bulletin provides repair information to correct a customer concern of Radio System Settings Lost or Returning to Default Values.
• 10214235Feb 18, 2022Fuel system, Transmission and drivetrain. This technical bulletin provides a procedure to inspect the front pump of the transmission for a possible leak.
• 10208987Feb 15, 2022Electrical system, Fuel system. This Preliminary information communicates to the dealership technician a change made to the wire harness and reductant control module for the Diesel Exhaust Fluid tank connector.
• 10208985Feb 14, 2022Air bags, Other or unknown. This Preliminary information communicates to dealership how to test properly trailer light option on the truck and also provide additional information on trailer issues.
• 10208976Feb 8, 2022Other or unknown, Transmission and drivetrain. This Preliminary information communicates that the service 4wd message related to C119E is under investigation for a repair.
• 10208973Feb 8, 2022Equipment. This Preliminary information provides information to the technician on installing a roof beacon light. Technician will need to reference the latest version of General Motors Up-fitter Integration Bulletin 157. The information can be found at http://www.gmupfitter.com/ under the "Technical Bulletin" Tab and then "Show all bulletins."
• 10208972Feb 7, 2022Other or unknown, Electrical system. This Preliminary information communicates to technicians to update the program in the reductant controller
• 10214233Feb 4, 2022Electrical system. This bulletin provides a procedure to program the BCM to correct the customers concern of RKE idle Time-out.
• 10214223Feb 4, 2022Equipment. This service bulletin provides information to inform dealership personnel about Law Enforcement and Government vehicles that request to disable or enable content.
• 10207646Feb 4, 2022Fuel system, Electrical system, Engine cooling. Service Update. On certain vehicles equipped with a 6.6L diesel engine (RPO L5P), the DEF tank connector may overheat and set the following diagnostic codes (P10D9, P143C and P10F3), which will result in reduced engine speed. Dealers are to reprogram the reductant control module.
• 10215770Feb 1, 2022Other or unknown. Information.
• 10215769Feb 1, 2022Other or unknown. Information.
• 10213766Jan 28, 2022Equipment. This Warranty Administration bulletin provides information on Global Warranty Management (GWM) Warranty Parts Center (WPC) Parts Return Program Information.
• 10213762Jan 28, 2022Equipment. This service bulletin provides information for dealers/technicians on Use of Dealer Case Management (DCM) and Being Prepared for Contacting U.S. Technical Assistance (TAC).
• 10212633Jan 28, 2022Equipment. This service bulletin provides information for the Global Warranty Management (GWM) Warranty Parts Center (WPC) Part Photo Return Process (U.S. Dealers Only).
• 10213768Jan 27, 2022Equipment, Body and structure. This preliminary informational bulletin provides information on Damaged, Disassembled or Improperly Packaged Turbochargers Returned to Warranty Part Center.
• 10213765Jan 27, 2022Fuel system, Other or unknown. This service bulletin provides technicians with updated information to help identify the differences between what is considered a fluid leak, and what is considered fluid seepage.
• 10213761Jan 27, 2022Back-over prevention (rear camera). This informational bulletin provides information on Internal Engine Noise or Damage After Oil Filter Replacement.
• 10212603Jan 27, 2022Brakes. This service bulletin provides information for cleaning brake dust off of aluminum or chrome wheels.
• 10208064Jan 27, 2022Engine cooling. This Preliminary information communicates to technicians to replace the ECM and affected sensor if diagnostics leads to replacement of the ECM.
• 10208063Jan 27, 2022Engine cooling. This Preliminary information communicates to dealership technicians to perform a sweep of the coolant flow control valve and test the circuits before replacing the Engine Coolant Flow Control Valve, and to assist engineering in root causing the P2B60.
• 10208062Jan 27, 2022Visibility (wipers, defrost, mirrors). This Preliminary information communicates to technicians to update the program in the DEF controller
• 10214216Jan 25, 2022Brakes, Wheels. This service bulletin provides repair information to correct customer concerns of Rear Wheel Lock Up, ABS Event, Loud Bang and a Flashing ?D? on Driver Information Center (DIC) when Lightly or Moderately Accelerating Forcing an 8-7 or 8-6 Downshift.
• 10214199Jan 24, 2022Equipment, Engine cooling. This informational bulletin provides a way for the technician to identify if the ECM has been modified.
• 10208053Jan 24, 2022Electronic stability control. This Preliminary Information communication provides information to the technician about vehicles that have an unwanted Stability Activation and/or a Service Stability message on the Driver Information Center. Technician may find a Diagnostic Trouble Code C0710. Technician should inspect for vehicles modifications before any in-depth diagnostics are performed.
• 10208052Jan 24, 2022Electrical system. This Preliminary information communicates to the dealer technicians a warm engine knock noise has no short or long term effects on the engine. Do not attempt repairs for this noise.
• 10206819Jan 20, 2022Fuel system, Electrical system. On certain vehicles equipped with a 6.6L diesel engine (RPO L5P), the DEF tank connector may overheat and set the following diagnostic codes (P10D9, P143C and P10F3), which will result in reduced engine speed. Dealers are to reprogram the reductant control module.
• 10212607Jan 19, 2022Exterior lighting, Fuel system. This service bulletin provides service information for customer concerns of an in-tank fuel pump whining noise, engine hard to start and/or stalls and Malfunction Indicator Lamp (MIL) is illuminated that may be caused by gelling of fuel in cold temperatures.
• 10214197Jan 18, 2022Equipment, Fuel system. This informational bulletin advises the technician to not replace the TMAP sensor, clean it using air or harsh chemicals but allow time for the sensor to thaw.
• 10212628Jan 18, 2022Electrical system. This service bulletin provides information for dealers/technicians on Stone Chip/Membrane Damage, Broken Connector and/or Sensor Retaining Tabs, and/or Paint Damage of Park Assist Sensors.

← All problems reported for the 2021 GMC Sierra 2500