Questions & Answers for: GMC Denali p0303

Question about GMC Denali

1 Answer

P0303 CODE this is for eng misfire cylinder # 3 misfire try tune up

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Question about 2001 Denali

1 Answer

P0303 CODE P0303 is a cylinder Misfire number 3. It can be a coil, plug, injector or intake leak. Thanks Jay!

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