Service bulletins for the 2026 Peterbilt 536
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.
12 on file from NHTSA, as of 2026-10-19.
By type
By component
Only bulletins with component: Transmission and driveline are shown. Show all
| T020 - PB | 2025-04-04. Service bulletin. POWER TRAIN. Fix-As-Fail Certain Model 535, 536, 537, and 548 chassis equipped with a PACCAR TX-8 transmission received transmission software with an incorrect variable. This software issue may cause DTC 521215-2 to set, the Transmission Dash Light to Illuminate, and shifting to be restricted. A software update is now available to fix the issue. Fix-as-Fail start date: 03/19/2025. |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.