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January 1, 2004 Service bulletin

Engine knock noise initial startup in cold ambient 10 degrees centigrade/50 degrees fahrenheit

Chevrolet technical service bulletin 00078F for 2002-2003 Chevrolet Trailblazer, 2002-2003 GMC Envoy and 2002-2003 Oldsmobile Bravada.

Bulletin number
00078F
Component
Engine and engine cooling: engine
Summary
Engine knock noise initial startup in cold ambient 10 degrees centigrade/50 degrees fahrenheit. Tt

Owners of these vehicles have filed 433 complaints in the engine category.

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