5.3 swap a/c wiring.

[5.3_silverado]

I am going to do this for the guys out there that is running a dbw lm7 in there trucks and wanting to wire the a/c into the pcm. I will keep this post upand going till I figure something out on this. I am wanting the pcm to control the compressor and the fans. Looking at a wiring diagram for my 2005 5.3. I need a 5 volt reference on one pin which i will get it from my low pressure switch. The main line for the serial data. I cant do 12V reference on it. Its the line that communicates with the pcm from the hvac control module. So my goal is to use the 2005 hvac control module in my 92 c1500. Hopefully everything will go as planned cause in fall Im stripping the dash out of my truck to hide the pcm behind it. I will post pics.