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Re: 2002 GMC Yukon, Poll Did It, Or Didn't It Need It
Posted to Technical Discussion Forum on 6/29/2007 1 Reply

freeze frame says it had 3 codes, what was the third one? odd that it was in open loop after 18 min. with a warm engine and good fuel trims at that time. Maybe 3rd code was p1000? that may indicate that codes had been previously cleared. I think this will be a... Login to read more.

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