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Service bulletin TIB-01-56

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 id10030253
Published by NHTSA2009-09-03
Manufacturer's numberTIB-01-56
Manufacturer's date2009-03-18
NHTSA componentELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR

NHTSA's summary

KENWORTH: WHEN CHARGING KENWORTH CLEAN POWER SYSTEM STORAGE COOLER, THE INVERTER MAY TRIP, CAUSING THE COMPRESSOR OPERATION TO SHUT DOWN. A RED LIGHT ON SLEEPER CONTROL PANEL WILL ILLUMINATE AS AN INDICATION OF THIS FAULT. *PE

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, Alternator

Vehicles listed
KENWORTH T6602007 to 2008

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