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International Automotive Technicians Network
Re: GM 5.3 P0300 #4
Posted to Technical Discussion Forum on 1/27/2015

Scott, I would think so but I didnt spend the time to nail down the specific cylinder that was misfiring. if I remember correctly (over two years ago) the 02 had coded while driving and data showed flat lined. I was going to start cylinder tests etc for the mi... Login to read more.