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Service bulletin TT7437EN

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 id10156786
Published by NHTSA2019-04-08
Manufacturer's numberTT7437EN
Manufacturer's date2014-02-04
NHTSA componentENGINE

NHTSA's summary

Tech Tip concerning Kenworth Vehicle Configuration May Allow the Engine to Start in Range

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine

Vehicles listed
ALLISON 3000 SERIES TRANSMISSION

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