Service bulletins for the 2021 Peterbilt 579
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.
117 on file from NHTSA, as of 2026-10-19.
By type
By component
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Only bulletins with topic: maintenance are shown. Show all
| 41-024 | 2026-05-20. Service bulletin. ENGINE. Procedures have been updated to include additional truck models in the service intervals table. |
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| 41-024 | 2026-04-07. Service bulletin. ENGINE. Engine Air Filter Servicing UPDATE - Procedures are available to support the maintenance, service intervals, and intake system inspection process for all engine air intake system components. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.