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Service bulletin 3174A

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 id10017147
Published by NHTSA2005-10-26
Manufacturer's number3174A
NHTSA componentSEATS:FRONT ASSEMBLY:SEAT HEATER/COOLER

NHTSA's summary

HVAC, PASSENGER LUMBAR AND/OR PASSENGER HEATED SEAT INOPERATIVE. *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

Seats

Vehicles listed
CHEVROLET COLORADO2004, 2005
GMC CANYON2004, 2005

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

Recalls for the same vehicles and component
20104182010-11-18. Seats And Restraints

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.