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Service bulletin C1422B

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 id10089492
Published by NHTSA2017-01-25
Manufacturer's numberC1422B
Manufacturer's date2014-10-07
NHTSA componentENGINE

NHTSA's summary

THIS CAMPAIGN AUTHORIZES THE REPLACEMENT OF THE FLEXPLATE ON CERTAIN ENGINES. THIS IS A REVISION TO A PREVIOUS COMMUNICATION.

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

Engine

Vehicles listed
CUMMINS ISB6.7

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