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Service bulletin 020604002

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 id631888
Published by NHTSA2002-06-25
Manufacturer's number020604002
Manufacturer's date2002-02-01
NHTSA componentUNKNOWN OR OTHER

NHTSA's summary

SUBJECT REGARDING COMMUNICATION INFORMATION IRREGULARITIES WHEN USING GENERIC SCAN TOOLS. *SLC

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 SILVERADO2001
GMC SIERRA2001

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