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September 21, 2005 Service bulletin

Automatic headlamp defeat inoperative after BCM replacement

Chevrolet technical service bulletin 3680 for 2002-2005 Chevrolet Trailblazer, 2002-2005 GMC Envoy and 2002-2004 Oldsmobile Bravada and others.

Bulletin number
3680
Component
Exterior lighting: headlights
Summary
Automatic headlamp defeat inoperative after bcm replacement. Tt

Owners of these vehicles have filed 689 complaints in the lights category.

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