Service bulletins for the 2020 Buick Regal
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.
587 on file from NHTSA, as of 2026-10-19.
About P0172 on the 2020 Buick Regal: what the code means, and the bulletins and recalls about the same components.
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Only bulletins with trouble code: P0172 are shown. Show all
| 22-NA-056 | 2022-03-30. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT; ELECTRICAL SYSTEM. This service bulletin provides a repair procedure to correct a customer concern of a MIL Illuminated with DTC P0172, P06DE and/or P0521 Set. |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.