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Service bulletin TT7484EN Rev A

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 id10155495
Published by NHTSA2019-04-01
Manufacturer's numberTT7484EN Rev A
Manufacturer's date2015-02-09
NHTSA componentENGINE; ELECTRICAL SYSTEM:WIRING

NHTSA's summary

Tech Tip concerning Pushbutton Shift Selector on Kenworth and Peterbilt Trucks will skip the oil level check and proceed to Prognostics

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

Electrical system, Engine, Wiring and fuses

Vehicles listed
ALLISON 3000 SERIES TRANSMISSION
ALLISON 4000 SERIES TRANSMISSION
KENWORTH T6802011
KENWORTH T8802011
PETERBILT 5672006
PETERBILT 5792006

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

Other bulletins for the same vehicles and component
32-0102018-05-21. Service bulletin. Information only - Customer installed inverters may be wired incorrectly.