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Service bulletin 34-071

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 id10161171
Published by NHTSA2019-06-11
Manufacturer's number34-071
Manufacturer's date2019-06-10
NHTSA componentENGINE; EXTERIOR LIGHTING:BRAKE LIGHTS

NHTSA's summary

Non-Safety Campaign: Vehicles ordered with parameter for brake lights disabled when engine brake applied were built with this feature enabled.

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, Lighting, Brake lights

Vehicles listed
KENWORTH T6802019
KENWORTH T8002019
KENWORTH T8802019
PETERBILT 5792019

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