Service bulletins for the 2019 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.
91 on file from NHTSA, as of 2026-10-19.
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Only bulletins with component: Steering are shown. Show all
| 15-027 | 2019-06-11. Service bulletin. STEERING:HYDRAULIC POWER ASSIST:POWER STEERING FLUID; EQUIPMENT ADAPTIVE/MOBILITY. Non Safety Campaign: ZF (supplier) steering gear boxes may have a sealing plug not seated corrected allowing power steering fluid loss. |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.