[Zedn]

GMPP would require the full harness and pedal as its a different ecu.

Thanks Rick. I have ordered VCM suite so should be able to do some more thorough testing before replacing anything. It's starting to look like ecu, but I want to make sure before buying one. There isn't anything to say it is the crank circuit, that has been assumed but from what I have read on the net, my symptoms are typical of many different problems.