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
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Only bulletins with component: Headlights are shown. Show all
| PIT5918 | 2022-06-13. Service bulletin. EXTERIOR LIGHTING:HEADLIGHTS. This Preliminary information communicates an issue where GM Accessory Illuminated Emblem may cause an issue with the left headlight/turn signal and dealership are to disable the Accessory Illuminated Emblem until a fix is available. |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.