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Service bulletin SPN-2596

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 id10191998
Published by NHTSA2021-05-10
Manufacturer's numberSPN-2596
Manufacturer's date2014-01-25
NHTSA componentEQUIPMENT; ELECTRICAL SYSTEM

NHTSA's summary

This diagnostic is typical J1939 CM1 message is missing or not available.

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, Equipment and accessories

Vehicles listed
DETROIT DIESEL EFILL

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