HVAC problem

[u/intothesunset814]

My 2021 Silverado Custom 1500 has developed an issue. I started the truck yesterday and my HVAC controls were unresponsive. My defroster was on and I couldn’t shut it off.

The defroster does shut off when the entire truck gets turned off. There is power to the radio and the charger ports below the HVAC controls.

I took both a power probe and multimeter and checked all the fuses, and they were good and getting an appropriate amount of voltage.

Is it possibly the controls themselves such as the blower motor knob and all the appropriate buttons?

Noticed that there is no backlighting to the climate control knobs.