Service bulletins for the 2021 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.
23 on file from NHTSA, as of 2026-10-19.
By type
By component
Only bulletins with component: Steering column and wheel are shown. Show all
| R2105 | 2024-03-04. Service bulletin. ELECTRICAL SYSTEM; STEERING:COLUMN. Peterbilt has determined that certain model year 2021, pre-production chassis are eligible to have specific parts updated to production level. |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.