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Service bulletins for the 2009 Peterbilt 378

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.

15 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
32-0152020-07-03. Service bulletin. ELECTRICAL SYSTEM. Information Only: This bulletin provides dealers with a battery warranty quick reference guide to ensure the appropriate tests for battery warranty are performed in order to prevent battery warranty claims filed with incorrect or incomplete information.
34-0852020-04-03. Service bulletin. VEHICLE SPEED CONTROL; ELECTRICAL SYSTEM. Information Only – Vehicles may have the connector seals on the wheel speed sensor incorrectly installed, which may lead to water intrusion and corrosion in some vehicles.
34-0852020-03-04. Service bulletin. VEHICLE SPEED CONTROL; ELECTRICAL SYSTEM. Information Only: Vehicles may have the connector seal on the wheel speed sensor incorrectly installed, which may lead to sensor corrosion.
34-0662019-07-08. Service bulletin. ELECTRICAL SYSTEM. Information Only - Quick Reference Guide for Electric harness damage repairs.
13-0492019-03-18. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Information: Bendix ACOM Software version 6.16.5.0 for diagnostics may introduce an unrecoverable error. Notice to dealers to replace this version with older software version until Bendix introduces new version.
03-0642018-08-13. Service bulletin. ELECTRICAL SYSTEM. Information - Recommended Practices for Updating ESA Software
RN-810-12011-01-06. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. PETERBUILT SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. CERTAIN VEHICLES BUILT BETWEEN 12/4/09-8/17/10 WERE MANUFACTURED WITH DEFECTIVE INTRUMENTATION SOFTWARE. THE SOFTWARE DEFECT MAY INTERMITTENTLY RESULT IN AN ODOMETER THAT DOES NOT ADVANCE WHILE THE VEHICLE TRAVELS. NEW SOFTWARE WILL BE INSTALLED TO CORRECT THIS CONDITION. NO MODELS WERE LISTED. CSC LETTER WAS RECEIVED. *PE

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.