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Service bulletins for the 2020 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.

1990 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

By topic

Bulletins, newest first
PIT62402024-10-25. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates information on adding RPO UF3 Fast Idle to a vehicle.
PIT6134D2024-10-25. Service bulletin. SERVICE BRAKES. This Preliminary information communicates an issue with premature brake pad life and engineering is working on release new pad lining material.
23-NA-2012024-10-24. Service bulletin. SERVICE BRAKES; ELECTRICAL SYSTEM; STEERING. This service bulletin advises the technician of a possible loose ground that may be causing customer concerns of Loss of Steering Assist and/or Loss of Brake Assist and Malfunction Indicator Lamp (MIL) Illuminated.
21-NA-1662024-10-24. Service bulletin. ELECTRICAL SYSTEM; STEERING. This informational bulletin provides information on the turn signal stalk not cancelling and/or mis cancelling.
PIT5909C2024-10-24. Service bulletin. STRUCTURE:BODY. This Preliminary information communicates that it is normal for the tailgate to drop faster than it used to after the GM Accessory Kicker Audio System is installed.
21-NA-1202024-10-24. Service bulletin. POWER TRAIN. 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.
08-07-30-026I2024-10-24. Service bulletin. POWER TRAIN. 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.
PIT6134C2024-10-22. Service bulletin. SERVICE BRAKES. This Preliminary information communicates an issue with premature brake pad life and engineering is working on release new pad lining material.
18-NA-1462024-10-22. Service bulletin. UNKNOWN OR OTHER. This warranty administration bulletin provides policy information, proper labor operation selection and causal part identification for warranty transactions (U.S. Only).
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.
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.

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