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Service bulletin 1146

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 id10006442
Published by NHTSA2004-05-03
Manufacturer's number1146
Manufacturer's date2004-03-12
NHTSA componentUNKNOWN OR OTHER

NHTSA's summary

STOP DELIVERY ORDER ON CERTAIN VEHICLES WITH 4L80E OR 4L8E AUTOMATIC TRANSMISSION. THIS ALSO INCLUDES 2004 GMC, CHEVROLET W-MEDIUM DUTY AND ISUZU W SERIES. *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 AVALANCHE2004
CHEVROLET EXPRESS2004
CHEVROLET SILVERADO2004
CHEVROLET SUBURBAN2004
GMC SAVANA2004
GMC SIERRA2004
GMC YUKON XL2004

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