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
Only bulletins with component: Axle are shown. Show all
| PIP5962 | 2024-03-18. Service bulletin. POWER TRAIN:AXLE ASSEMBLY. This Preliminary information communicates how to isolate a tick noise from the rear axle housing. |
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| PIP5653M | 2022-03-14. Service bulletin. POWER TRAIN:AXLE ASSEMBLY. This Preliminary information communicates that engineering is investigating a repair for a chirp noise associated with the front axle assembly. |
| PIP5653L | 2022-02-14. Service bulletin. POWER TRAIN:AXLE ASSEMBLY. This Preliminary information communicates that engineering is investigating a repair for a chirp noise associated with the front axle assembly. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.