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: Starter are shown. Show all
| PIE0594A | 2020-12-21. Service bulletin. ELECTRICAL SYSTEM:STARTER ASSEMBLY; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards an intermittent no start. |
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| PIE0578B | 2020-10-26. Service bulletin. EQUIPMENT; ENGINE; ELECTRICAL SYSTEM:STARTER ASSEMBLY. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to a Slow Start and/or No Start, Battery Message Indicated, having to jump start on more then one occasion. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.