Need help connecting my a/c compressor.

[LS1GMCTruck]

I think I may have the hoses figured out but does anyone know how to wire the system? Should I use the wiring from the old harness and just wire on the pigtail for the new compressor? or does the LS compressor have to be operated by the new PCM? and if so how do I incorperate my original controls?

NITROUS! Where are you? He knows this A/C stuff, on our trucks. Let me try to remember. You have a A/C request wire that comes from your dash control. This gets wired to one side of your two-wire low pressure switch thats on your accumulator on the firewall. The other wire from the accumulator switch connects to your A/C request wire coming from your computer. Also from the computer, is a wire that activates the relay, that cycles the compressor on & off. You should also have an A/C sensor plug/wire coming off the harness, that plugs into a hi-pressure side sensor that should be intalled on the hi-pressure side hose somewhere. RedHeartBeat knows this **** too.