My 01 silverado used to have ice cold ac. Now it doesn't get cold at all in the cab. I checked the freon and it shows good pressure. The ac lines in the engine are cold too. The compressor is working too. I checked the heater blend door actuator and that works fine. I don't know if there is some sort of internal air temperature sensor or if the heater controls crapped out. Anybody have any ideas?

 

Heater controls could be bad, have you replaced te cabin air filters before?

 

Yes. I replaced them not too long ago. I just removed them today too. They are dirty so I will replace them just to be safe.