jdustin

I put a 5.3 in my 99 suburban. I put a sanden compressor on it and I am allso using both computers on the truck. I do not have a ground coming from the original pcm to turn on the ac compressor. Any ideas on what the simplest way to wire this will be? I thought I could just use the original old truck harness and pcm to controll the ac but I was wrong. .what do I need to do to trick the pcm to turn on the relay? Using the original pcm just for the ac??