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.

• 11009760Sep 21, 2024Electrical system. This service bulletin provides information on the Transport Mode Feature, also known as Logistics mode, which is used to increase the 12V Battery stand time of the vehicle during transit and or long period of stand time at the dealerships.
• 11009430Sep 19, 2024Fuel system, Engine. This technical bulletin provides a procedure to correct the condition of Malfunction Indicator Lamp Illuminated with DTCs P2463 P2459 P11FB P11D3.
• 11009756Sep 17, 2024Engine, Transmission and drivetrain. This bulletin provides information on Policies Applicable to All U.S. Dealers for Engine and Transmission Assembly Replacement Under Warranty, Policy or Customer Enthusiasm and information on Submission of Warranty Transaction in Global Warranty Management.
• 11009099Sep 17, 2024Steering, Electrical system. This informational bulletin provides information on the turn signal stalk not cancelling and/or mis cancelling.
• 11009093Sep 16, 2024Transmission and drivetrain. This service bulletin provides a Diagnostic Tip for Noise, Vibration, and/or Harshness Issues/Clunk Noise Heard During Coast Down Event after the transfer case was removed from the transmission and reinstalled during a recent repair.
• 11009088Sep 16, 2024Transmission and drivetrain. This service bulletin provides information on some vehicles that may rock or move slightly forward or rearward while in Park at start up after cold soak. This condition may be accompanied by a clunk noise. This is a slight movement that is more often seen visually, rather than felt, when viewed from the outside and using the auto-start feature, if equipped.
• 11007807Sep 16, 2024Engine. This Preliminary information communicates that some customers may comment that after an auto-stop event the engine does not restart and to inspect the engine ground strap. Temporarily on hold while PIE0572 is active. PIE0572 has now ended and reinstating the PI.
• 11009039Sep 14, 2024Other or unknown. This warranty administration bulletin provides policy information, proper labor operation selection and causal part identification for warranty transactions (U.S. Only).
• 11007787Sep 14, 2024Other or unknown. This Preliminary information communicates an issues with the HVAC making a hum buzz noise when the blower is set to a higher speed. Engineering is working on a new HVAC door seal material to correct the noise.
• 11007773Sep 13, 2024Other or unknown. This Preliminary information communicates an issue with the SES MIL and DTC P062B and engineering is working on a fix.
• 11007739Sep 12, 2024Other or unknown. This Preliminary information communicates that the tool for the HD transfer cases to measure clutch pack shim selection is in development.
• 11008962Sep 11, 2024Transmission and drivetrain. This service bulletin advises the technician to check if the transmission cooler lines are twisted to correct customer concerns of Harsh Shift, Shudder, Surge, Stall, Transmission Overheating and/or High Transmission Fluid Temperature.
• 11009037Sep 10, 2024Other or unknown. This service bulletin provides information on Enhancing Field Product Reports with Digital Pictures.
• 11009031Sep 10, 2024Steering, Wheels. This informational bulletin provides information on Steering Bump or Clunk Noise on Rough Roads or Potholes.
• 11008966Sep 9, 2024Transmission and drivetrain. This technical bulletin provides a procedure for the techs to replace the forward check ball and separator plate if found the cause of the customers concern of No Forward Gear When Shifting from Park to Drive and/or Reverse to Drive.
• 11008956Sep 9, 2024Other or unknown. This service bulletin provides information for dealers/technicians on When and How to Submit a Field Product Report (FPR) (U.S. and Canada Dealers Only).
• 11007214Sep 6, 2024Transmission and drivetrain. This Preliminary information communicates the results if an in-correct P/N Stator Shaft Support was installed during a transmission repair attempt.
• 11007208Sep 6, 2024Other or unknown. 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.
• 11007183Sep 6, 2024Other or unknown, Electrical system. This Preliminary information communicates a diagnostic tip for an SES MIL at startup with DTC U0100. Dealer are to test the accessory wake up circuit to the ECM for power.
• 11008898Aug 27, 2024Other or unknown. The bulletin provides direction on how to locate the Temporary Service Part (TSP) form in GlobalConnect.
• 11006621Aug 26, 2024Electrical system. Vehicle Wide Programming (VWP) is a new process to update software on GM Vehicles. It provides the ability via a single selection within Techline Connect to first identify which modules need updating and then proceed to updating affected modules (with some exceptions). The updating of modules is completed in parallel instead of the technician needing to update one module at a time. This allows a more streamlined…
• 11007936Aug 22, 2024Suspension. This service bulletin provides information to dealership personnel on diagnosis and replacement of shock absorber and strut due to fluid leak.
• 11007935Aug 22, 2024Suspension. This service bulletin provides information to dealership personnel on diagnosis and replacement of shock absorber and strut due to fluid leak.
• 11008906Aug 19, 2024Engine. 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.
• 11007721Aug 16, 2024Electrical system, Engine. This service bulletin provides information on AGM batteries that require less frequent charging in storage.
• 11006497Aug 16, 2024Other or unknown, Electrical system. This Preliminary information communicates an issue with the SES MIL and DTC P062B and engineering is working on a fix.
• 11006487Aug 16, 2024Engine. This Preliminary information communicates that some customers may comment that after an auto-stop event the engine does not restart and to inspect the engine ground strap. Temporarily on hold while PIE0572 is active. PIE0572 has now ended and reinstating the PI.
• 11006486Aug 16, 2024Other or unknown. This Preliminary information communicates to the dealer technician to reference the electronic parts catalog to check the EGR valve part number that was installed.
• 11006460Aug 16, 2024Exterior lighting. This Preliminary information communicates an issue where GM Accessory Illuminated Emblem may cause an issue with the left headlight/turn signal and dealership are to disable the Accessory Illuminated Emblem until a fix is available.
• 11007430Aug 15, 2024Engine. This service bulletin provides information on 6.6L Duramax Possible Oil Leak Path Information.
• 11007429Aug 15, 2024Engine. This informational bulletin advises the technician of how the Soot information has changed from grams to percentage.
• 11006276Aug 13, 2024Transmission and drivetrain. This Preliminary information communicates that the t-case input seal, and/or the o-ring most likely is the source of the leak between the transmission and the t-case.
• 11007718Aug 12, 2024Engine. This service bulletin explains how to identify possible DEF system contamination.
• 11007154Aug 9, 2024Engine. This service bulletin provides a diagnostic aid procedure on how to perform a quick test to check if the DPF is the cause of excessive soot from the tailpipe.
• 11007150Aug 9, 2024Engine. This informational bulletin provides information on higher than expected oil consumption.
• 11007147Aug 9, 2024Engine. This bulletin provides information on common diesel engine tick noises and how they are considered part of normal operation and no parts should be replaced for these normal operating conditions.
• 11007123Aug 9, 2024Engine. This informational bulletin provides information on Diesel Exhaust Fluid (DEF) and the proper use of the DEF system.
• 11006707Aug 9, 2024Engine. This informational bulletin provides information for the technicians on where to look on the Duramax engine for coolant leaks.
• 11006682Aug 9, 2024Other or unknown. This service bulletin provides information on a guide to help reduce repeat visits for the same customer concern.
• 11007155Aug 8, 2024Engine. This informational bulletin advises the technician that the engine and related parts will be debited if found that the tech did not properly prepare the engine block from dirt and debris in bolt holes or if found that the block was damaged by the tech.
• 11007115Aug 8, 2024Engine. This service bulletin provides information on Internal Engine Noise or Damage After Oil Filter Replacement.
• 11007121Aug 7, 2024Engine. This bulletin provides information on Engine Concerns that could result from lack of scheduled maintenance, improper service or aftermarket calibrations.
• 11007095Aug 7, 2024Fuel system. This bulletin provides information on the TOP TIER Detergent Gasoline Licensed Brands and the TOP TIER Diesel Fuel Licensed Brands that are recommended for use in all GM vehicles and the TOP TIER FUELS website URL.
• 11006670Aug 7, 2024Engine. This service bulletin advises about the possible issues that may occur when using a scotch brite pad or highly abrasive disk on gasket sealing surfaces or reused parts.
• 11007116Aug 6, 2024Electrical system, Engine. This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
• 11007091Aug 5, 2024Engine. This service bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
• 11006604Aug 3, 2024Fuel system, Engine. 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.
• 11006645Aug 1, 2024Electrical system, Engine. This informational bulletin provides a way for the technician to identify if the ECM has been modified.
• 11006644Aug 1, 2024Other or unknown. This Warranty Administration service bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA).
• 11006511Jul 31, 2024Visibility (wipers, defrost, mirrors). This PI provides information on Rear and Side Tempered Glass Spots (Quench Marks) and that they are a normal characteristic.

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