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International Automotive Technicians Network
Re: GM cat monitor/ monitors setting in order
Posted to Technical Discussion Forum on 9/3/2018

I didn't get that far into it regarding EVAP. It was around this model year that the service bay test has you drive it after enabling purge for 16km and run time of 15 minutes and then key off which is a bit unnerving to let it test it's natural pressure decay... Login to read more.