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: Fuel tank are shown. Show all
| 17-NA-302 | 2024-03-28. Service bulletin. EQUIPMENT; FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY. This informational bulletin provides information on availability for a locking gas cap for trucks are operated in high amount of dirt or dust which can migrate to the filler cap area. |
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| 23-NA-148 | 2023-11-07. Service bulletin. FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY; EQUIPMENT. This technical bulletin provides a procedure to correct the condition of Missing French Translation Label on Fuel Cap. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.