Looking to Find the Schematic for My Car HVAC Controls

I'm trying to replace my 2005 GMC Yukon knob and button heater control a touch screen operation. I'm trying to figure out the circuitry using a multi meter but I'm having some difficulties because I dont know what the values relate to. I am trying to find the circuitry schematics for the controls but cant seem to find anything. Looking for any input or guidance.

Thanks for any advice.

~Freeman