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January 1, 2004 Service bulletin

Service 4WD light on no codes besides U1000 codes

Chevrolet technical service bulletin 01446A for 2003-2004 Chevrolet Trailblazer, 2003-2004 GMC Envoy and 2003-2004 Oldsmobile Bravada and others.

Bulletin number
01446A
Component
Power train: transfer case (4-wheel drive)
Summary
Service 4wd light on no codes besides u1000 codes. Tt

Owners of these vehicles have filed 239 complaints in the transmission category.

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