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Service bulletin 020601020

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 id634721
Published by NHTSA2002-10-07
Manufacturer's number020601020
Manufacturer's date2002-05-01
NHTSA componentUNKNOWN OR OTHER

NHTSA's summary

SUBJECT REGARDING CHANGE TO FLYWHEEL TO CRANKSHAFT ATTACHING BOLTS. *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.

Vehicles listed
CHEVROLET TRAILBLAZER2002
GMC ENVOY2002
OLDSMOBILE BRAVADA2002

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