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Service bulletin 020602003

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 id635020
Published by NHTSA2002-10-16
Manufacturer's number020602003
Manufacturer's date2002-06-01
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:GASOLINE

NHTSA's summary

SOME CUSTOMERS MAY COMMENT ON ENGINE OIL SEEPAGE. *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

Vehicles listed
CHEVROLET G251996 to 2002
CHEVROLET G351996 to 2002
GMC G251996 to 2002
GMC G351996 to 2002

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