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Service bulletins for the 2021 GMC Sierra

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

1649 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

By topic

Bulletins, newest first
07-00-89-036K2024-10-22. Service bulletin. UNKNOWN OR OTHER. This service bulletin provides information on Enhancing Field Product Reports with Digital Pictures.
24-NA-1862024-10-22. Service bulletin. STRUCTURE:BODY; ENGINE. This bulletin advises the tech that if the wrong mounts are installed, this may be the cause of the engine vibration.
24-NA-1852024-10-22. Service bulletin. STEERING; WHEELS. This informational bulletin provides information on Steering Bump or Clunk Noise on Rough Roads or Potholes.
PIT5569C2024-10-18. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates direction and examples when diagnosing multiple DTCs, one of which includes U**** Byte 71 DTC.
PIP5921A2024-10-18. Service bulletin. ENGINE. This Preliminary information communicates the possibility of the Intake Cam Actuator cover plate screws backing out and making unwanted contact with the Cam Carrier.
23-NA-1422024-10-17. Service bulletin. POWER TRAIN. 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.
22-NA-1822024-10-17. Service bulletin. POWER TRAIN. 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.
19-NA-1292024-10-17. Service bulletin. SUSPENSION. This technical bulletin provides repair information to correct a customer concern of a squeak and/or clunking noise coming from the rear of the vehicle.
02-00-89-002X2024-10-17. Service bulletin. UNKNOWN OR OTHER. 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).
18-NA-0732024-10-11. Service bulletin. ENGINE. 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.
24-NA-1742024-10-10. Service bulletin. UNKNOWN OR OTHER. The bulletin provides direction on how to locate the Temporary Service Part (TSP) form in GlobalConnect.
21-NA-1492024-10-09. Service bulletin. ELECTRICAL SYSTEM; ENGINE. This service bulletin provides repair information for Engine Wire Harness Chafing to correct customer concerns of IPC Gauges Sweep, IPC Warning Message, SES/Check Engine/MIL, No Start/ No Crank, Runs Rough, Stalls, Reduced Engine Power, Various DTCs.
24-NA-1752024-09-28. Service bulletin. ENGINE. This bulletin advises the tech to validate the vibration and to perform an Engine mount balance to verify if the mounts were binding and the cause of the customer concern.
05-03-08-002J2024-09-20. Service bulletin. SUSPENSION. This service bulletin provides information to dealership personnel on diagnosis and replacement of shock absorber and strut due to fluid leak.
05-03-08-002J2024-09-20. Service bulletin. SUSPENSION. This service bulletin provides information to dealership personnel on diagnosis and replacement of shock absorber and strut due to fluid leak.
N2424506312024-09-18. Service campaign. ENGINE. Service Update. Certain vehicles equipped with a 2.7L engine (RPO L3B), may have an Engine Control Module (ECM) that does not sufficiently control fuel injector flow rate under certain driving conditions. Dealers are to reprogram the ECM.
PIT5860C2024-09-16. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates and issue with a no crank, Key Learn Pending or Ready For FOB 3 Message, Unable To Exit RVS With Push To Start Button, Symptoms Of A Dead Battery and has dealership inspect to see if the vehicle is falsely entering the manual transmitter programming and if so to replace the drivers power window switch.
PIT5689J2024-09-16. Service bulletin. ENGINE. 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.
PIP5949A2024-09-16. Service bulletin. ENGINE. This Preliminary information communicates to the dealer, a potential rough running condition following an autostop event that is caused by the incorrect crankshaft position sensor.
PIT5680A2024-09-14. Service bulletin. STRUCTURE:BODY. This Preliminary information communicates an issues with water/ice building up on the door sill plate and advising dealership to inspect and reseal the door water deflector.
PIP6000A2024-09-14. Service bulletin. POWER TRAIN. This Preliminary Information communication advises the technician on a parts restriction on the Generation I 8 speed rear wheel drive valve bodies.
PIT6132A2024-09-14. Service bulletin. UNKNOWN OR OTHER. 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.
PIT5966D2024-09-14. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates an issue with an OTA pending message still displayed after an OTA event and how to reset/clear the message.
PIP5990A2024-09-13. Service bulletin. ENGINE. This Preliminary information communicates a part restriction for certain MY 2.7 L3B service engines
PIT6110C2024-09-13. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates an issue with the SES MIL and DTC P062B and engineering is working on a fix.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.