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Service bulletin SIL 640

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 id10122050
Published by NHTSA2017-11-08
Manufacturer's numberSIL 640
Manufacturer's date2017-09-29
NHTSA componentELECTRICAL SYSTEM:SOFTWARE

NHTSA's summary

This service information letter (SIL) requires the installation of an operating system software update for improved performance. Additionally two hardware updates will be performed at the same time.

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, Software

Vehicles listed
ALTEC AA

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