Service bulletins for the 2021 Chevrolet Trailblazer
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.
753 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
By topic
| 20NA084 | 2020-05-26. Service bulletin. ENGINE. This informational bulletin advises of normal engine noise produced by the engine. |
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| PIP5692A | 2020-05-11. Service bulletin. ENGINE AND ENGINE COOLING. The Preliminary Information communication advises the technician that there is a part restriction for the 1.2L LIH engine. The dealer technician is advised to call the GM Product Quality Center for further assistance. |
| PIP5691A | 2020-05-11. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. The Preliminary Information communication advises the technician that there is a part restriction for the 1.3L L3T engine. The dealer technician is advised to call the GM Product Quality Center for further assistance. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.