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Service bulletin 98066

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 id604833
Published by NHTSA1999-05-17
Manufacturer's number98066
Manufacturer's date1999-02-01
NHTSA componentENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE)

NHTSA's summary

CUSTOMERS MAY EXPERIENCE LINEAR EXHAUST GAS RECIRCULATION SYSTEM VALVE STICKING OR FOREIGN MATERIAL HOLDING THE VALVE OPEN / CLOSED. *TT

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Engine, Exhaust and emissions, EGR valve

Vehicles listed
CHEVROLET L SERIES1995
CHEVROLET M SERIES1995
CHEVROLET S SERIES1995
CHEVROLET T SERIES1995
FORD L SERIES1995
GMC M SERIES1995
GMC S SERIES1995
GMC T SERIES1995

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