On mine I have the PCM "AC Request" on my truck hooked to the wire that goes from the controler on the dash that turned on the old compressor. I had to add the high side pressure switch so the PCM can sense the AC pressure and turn on the cooling fans. Works just like the camaros do, in other words the PCM controls all fan functions for temperature and AC! Most don't do it like this and say it is too much trouble, but I like it working like the factory intended it to.
2006 Superior Blue Trailblazer SS AWD, Stock as a rock
Sold: 2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).
Sold: 1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning
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