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International Automotive Technicians Network
Re: A question for GM Techs
Posted to Technical Discussion Forum on 8/24/2011

There are a couple interesting PI's on that model. 3621 and 3623 in particular. 3621 involves replacing the PCM by known faulty part numbers. 3623 states to clear the codes and try again, which you say you already did.

It would seem that if the circuit resis... Login to read more.