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International Automotive Technicians Network
Re: GMC P0430
Posted to Technical Discussion Forum on 3/1/2008

Hi Albin,

How did the truck run otherwise?

If it ran without complaint, I would road test and do a WOT run while taking a movie. I would look for the front and rear O2s to both go full rich and on full decel confirm a sharp drop to dead lean from all O2s a... Login to read more.