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
Only bulletins with component: Anti-lock brakes are shown. Show all
| PIT5569B | 2022-08-15. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; SERVICE BRAKES, AIR:ANTILOCK:WHEEL SPEED SENSOR. This Preliminary information communicates direction and examples when diagnosing multiple DTCs, one of which includes U**** Byte 71 DTC. |
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| PIP5834A | 2022-03-14. Service bulletin. SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:ABS WARNING LIGHT. This Preliminary information communicates that the service 4wd message related to C119E can be diagnosed and repaired. |
| PIT5707 | 2019-10-15. Service bulletin. SERVICE BRAKES, AIR:ANTILOCK:WHEEL SPEED SENSOR. This Preliminary information communication provides information to the dealer about vehicles with the ABS light or Service Stability Message displayed with C050A or C0504 DTC's set. Dealer may find manufacturing debris on the wheel speed sensor reluctor wheel causing this concern. Dealer is to clean the debris from the reluctor wheel and evaluate for concern. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.