I just put HVAC controls out of a 95 tahoe in it remember because the LEDz blew my last ones...All the lights work in the controls and when I turn the knob to air on the A/C and (C) lights come on???? Would that mean the HVAC is still fine?? Not a bad guess though. The only thing I can think is this HVAC control is from a tahoe and has the rear defrost option even though I don't have that, but it still plugged up fine and worked?? I just get no blowing action. Doesn't even sound like its trying to come on.
Only thing I can think is if the HVAC controls are somehow bad even though it lights up and acts like it's working....just doesn't blow.