Question about 2003 GMC Yukon Denali

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I have a p0303 code on my 2003 yukon. i have changed my spark plugs and wire and the problem still exist. can any one help. thanks

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A MISS DOESN'T SPARK ONLY,COULD BE FUEL RELATED INJECTOR OR WIRES,INJECTOR PULSE WORST CASE,IF NOT INJECTOR,VAVLE TRAIN ISSUE,ROCKER,PUSH ROD,VALVE,HOPE THIS HELPS

Posted on May 19, 2009

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