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Service bulletin IS-19910

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 id10153358
Published by NHTSA2019-02-19
Manufacturer's numberIS-19910
Manufacturer's date2019-01-30
NHTSA componentEQUIPMENT:ELECTRICAL

NHTSA's summary

This instruction sheet explains how to convert H3 SERIES US10 vehicles (equipped with Delco Remy Alternators) to electric fan drive (EFD) cooling system

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

Equipment and accessories

Vehicles listed
PREVOST H3-412011 to 2016
PREVOST H3-452011 to 2017

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