I tried to connect my lt1 fans to my pcm, but I don't know what pins to use. I have a pcm pin readout for my truck but it does not list any pins for fans. Are the pcms different for 2wd and 4wd. I was told that blue42 was for low speed fan and red33 for high speed fan, but my pcm shows blue42 not used and red33 recirculation actuator control. I'm confused on which pins to connect my relays to. Could someone help me out?

Jared

01 Z71 4wd