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Service bulletin 15-038

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 id10104022
Published by NHTSA2017-06-06
Manufacturer's number15-038
Manufacturer's date2015-11-09
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:DIESEL

NHTSA's summary

15-038_DETROIT_HEAVY_DUTY_ENGINE_SRT_REVISIONS_FOR_CASCADIAS

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
DETROIT DIESEL DETROIT
FREIGHTLINER FREIGHTLINER
THOMAS THOMAS
WESTERN STAR WESTERN STAR

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