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Service bulletin IS-19901A

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 id10174663
Published by NHTSA2020-05-05
Manufacturer's numberIS-19901A
Manufacturer's date2020-04-01
NHTSA componentELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING

NHTSA's summary

ELECTRIC FAN DRIVE COOLING SYSTEM CONVERSION WITH BOSCH ALTERNATOR - X3 SERIES US10 UP TO GHG17 COOLING SYSTEM - Mention added stating to disable “Prime”; Parts added in the kit

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, Engine

Vehicles listed
PREVOST X32011 to 2017

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