I Have A 2002 Silverado,5.3,4x4,auto. Air Conditioner Seems To Be On All The Time. Heater Will Not Come On. Temperature Control Will Not Adjust. Stays On Cold All The Time.

Well I had kind of the same problem with my old explorer and it was the blend door it was broke and cost $850 to fix. I am not say thats what it is but it could be that.