Service bulletins for the 2026 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.
310 on file from NHTSA, as of 2026-10-19.
About B3A6B on the 2026 GMC Sierra: what the code means, and the bulletins and recalls about the same components.
By type
By component
By trouble code
Only bulletins with trouble code: B3A6B are shown. Show all
| PIT6424B | 2025-09-17. Service bulletin. UNKNOWN OR OTHER. A vehicle may come in with B3A6B set in history. Tech is directed to clear code and advise the customer an OTA will be released for the code. |
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| PIT6424A | 2025-09-09. Service bulletin. UNKNOWN OR OTHER. A vehicle may come in with B3A6B set in history. Tech is directed to clear code and advise the customer an OTA will be released for the code. |
| PIT6424 | 2025-08-26. Service bulletin. UNKNOWN OR OTHER. A vehicle may come in with B3A6B set in history. Tech is directed to clear code and advise the customer an OTA will be released for the code. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.