Indy1K
TYF Newbie
My 07 Tahoe has automatic A/C with rear AC as well. I am trying to find an actual circuit schematic for the PCB in the HVAC Control module. The reason is no compressor cycling and so it freezes up. I have been down every rabit hole on this including replacing the high and low pressure switches, rework of the A/C system, and everything else in between. I am believing the problem is in the circuit that activates the compressor clutch with a signal from the HVAC Control Module thru the PCM. Does anyone know where I can get the actual circuit schematic of the PCB in the HVAC Control Module? I have all the wiring diagrams, but since that signal is on the serial data bus, I want to see what is generating it. Thanks in advance
