Service bulletins for the 2020 Peterbilt 337
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.
31 on file from NHTSA, as of 2026-10-19.
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Only bulletins with component: Driver assistance are shown. Show all
| 24KWL/PBL | 2026-08-20. Service bulletin. FORWARD COLLISION AVOIDANCE: WARNINGS. The verbiage in the Introduction section has been updated. |
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| 52-004 | 2021-08-05. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; ELECTRICAL SYSTEM:ADAS:BLINDSPOT:SOFTWARE. Fix-as-Fail: Radio does not mute when truck with auto trans is placed in reverse. Software flash resolves issue. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.