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January 5, 2006 Service bulletin

Momentary sag on light to moderate accel when cold - valve deposits

Chevrolet technical service bulletin 3644 for 2005-2006 Chevrolet Cobalt and 2004-2006 Saturn Ion.

Bulletin number
3644
Component
Engine and engine cooling: exhaust system
Summary
Momentary sag on light to moderate accel when cold - valve deposits. Tt

Owners of these vehicles have filed 420 complaints in the engine category.

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