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Service bulletin SIL 1-EP-15 Rev

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 id10117319
Published by NHTSA2017-09-14
Manufacturer's numberSIL 1-EP-15 Rev
Manufacturer's date2017-06-22
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

Service letter announcing the availability of kits to replace components of the Dual Power Inverter Module 2 (DPIM2) and eliminating the need to replace the entire DPIM2. The announcement includes servicing instructions.

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

Vehicles listed
ALLISON H 40 EP TRANSMISSION
ALLISON H 50 EP TRANSMISSION

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