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International Automotive Technicians Network
Re: 2002 GM S-10 Pickup OBDIII Monitor Issue
Posted to Technical Discussion Forum on 7/22/2006

C heck your fuel trim correction, if it's more than 4% the AIR system monitor usually will not run. So you may have another problem preventing that one from passing.

As far as the evap testing you can run that one manually with a tech2. not sure if another s... Login to read more.