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Service bulletin SB-13-34

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10041349
Published by NHTSA2011-09-27
Manufacturer's numberSB-13-34
Manufacturer's date2011-08-26
NHTSA componentELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL

NHTSA's summary

KENWORTH: TRAILER BRAKES WILL NOT RELEASE. *RM

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Electrical system

Vehicles listed
KENWORTH T7002007 to 2010

Listing a model year does not mean every vehicle of it is concerned: the document says which.