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Service bulletin T1603B

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 id10085325
Published by NHTSA2016-12-01
Manufacturer's numberT1603B
Manufacturer's date2016-07-29
NHTSA componentEQUIPMENT

NHTSA's summary

THIS TEMPORARY REPAIR PRACTICE PROVIDES PARTS AND LABOR TO COVER A FLEET COUNT AND TAG IF THE ECM BASE CODE IS CHANGED AS PART OF THE REPAIR DIRECTION ACCORDING TO TSB130099 AND/OR T1479. THIS IS AN UPDATE TO A PREVIOUSLY SUBMITTED 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

Equipment and accessories

Vehicles listed
CUMMINS ISX15

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