Service bulletins for the 2020 Chevrolet Express
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.
716 on file from NHTSA, as of 2026-10-19.
About P0521 on the 2020 Chevrolet Express: what the code means, and the bulletins and recalls about the same components.
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Only bulletins with trouble code: P0521 are shown. Show all
| PIP5630D | 2020-08-10. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates A vehicle may have a concern of no oil pressure and/or P0521 set. the releif valve in the pump is sticking or the number 1 main bearing is damaged. Drop oil pan and confirm #1 main is spun or not. If bearings are OK Then change oil pump. |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.