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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.

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Only bulletins with component: Software are shown. Show all

Bulletins, newest first
PIP56902019-12-09. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This Preliminary information communicates to dealer technicians there is a software anomaly not allowing the air filter life to be reset.
PIP56852019-11-12. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This Preliminary information communicates A vehicle with a customer concern of a SES P0128, Engineering is aware of the concern and working on the a repair. At this time clear the codes and do not replace the thermostat for this concern. There will be a calibration released for the concern in this near future. This PI will be updated when the calibration is released.
N1922105602019-08-26. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE. Service Update Bulletin. Certain vehicles may have a condition where the vehicle does not accelerate or decelerate but maintains speed after releasing the accelerator pedal for up to approximately 65 seconds. If the customer applies the brake pedal, the vehicle will stop as designed. Reprogram the engine control module.

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