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Service bulletin SIL 15-WT-17 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 id10118808
Published by NHTSA2017-10-15
Manufacturer's numberSIL 15-WT-17 Rev
Manufacturer's date2017-09-14
NHTSA componentPOWER TRAIN:AUTOMATIC TRANSMISSION; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)

NHTSA's summary

Relates to DTC code triggered by mismatch of current TIC if the TCM is disconnected prior to the TIC level locking.

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

Transmission and driveline, Automatic transmission, Transmission control module

Vehicles listed
ALLISON 3000 SERIES TRANSMISSION
ALLISON 4000 SERIES TRANSMISSION
ALLISON B SERIES
ALLISON T SERIES

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