Why does the service engine code appear showing #3 Misfire? Car seems to run fine, service engine light comes and goes...

Asked by desk Apr 16, 2014 at 11:46 PM about the 2006 Hummer H2

Question type: Maintenance & Repair

The H2 has been to several dealerships and mechanics, can only state #3 misfire, could this be a electrical issue?  Very frustrated!!!!

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