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October 1, 2010 Service bulletin

Gm: on a cold start there may be a hard start, brief rough running, black exhaust color, and an engine light

Chevrolet technical service bulletin PIP-4792A for 2009-2010 Chevrolet Tahoe, 2009-2010 Chevrolet Silverado and 2009 Chevrolet Suburban and others.

Bulletin number
PIP-4792A
Component
Engine and engine cooling: engine
Summary
Gm: on a cold start there may be a hard start, brief rough running, black exhaust color, and an engine light. The symptoms diminish after running a while. Rm

Owners of these vehicles have filed 106 complaints in the engine category.

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