Originally Posted by
Taz
Questions like yours seem common with the GMPP systems ... I've never used one ... but it appears GM should provide more "up front" information, or more detailed instructions. I'm guessing GM's intent was to allow the end user to setup the system without the need for any programming - hence the analogue gauge outputs. For an experienced person or professional shop, it limits certain tuning options.
Probably half of the transplants I've done have used a re-worked OEM harness (most cost effective option as the customer often gets the harness with the engine). Just takes a little time to make it look nice !
Regards,
Taz