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Service bulletin IS-19910D

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 id10164163
Published by NHTSA2019-09-05
Manufacturer's numberIS-19910D
Manufacturer's date2019-08-13
NHTSA componentELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING

NHTSA's summary

This Instruction sheet explains how to perform an Electric Fan Drive Cooling System Conversion with Delco Remy Alternator - H3 Series US10 To GHG17 Included

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 H3-412009 to 2018
PREVOST H3-452009 to 2018

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