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Service bulletin 01-55

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 id10026047
Published by NHTSA2008-09-26
Manufacturer's number01-55
Manufacturer's date2009-03-18
ReplacesTIB-01-55
NHTSA componentELECTRICAL SYSTEM:WIRING; ELECTRICAL SYSTEM

NHTSA's summary

KENWORTH: CLEAN POWER SYSTEM HIGH VOLTAGE REPAIR. HIGH VOLTAGE WARNING LIGHT ON THE VOLTMETER. T660S BUILT AND EQUIPPED WITH THE KENWORTH CLEAN POWER SYSTEM SINCE 05/25/07. *PE UPDATED 9/29/09. *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, Wiring and fuses

Vehicles listed
KENWORTH T6602005 to 2009

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