I have a 99 grand Prix GT that I'm having problems with the a/c. I charged the ac and my blower is running but no cold air. I can get air out of the floor, the vent, and the defrost but I can't get cold air. My ac circuit is running fine but Im wondering if it is a mised air damper issue. I have dual climate control and I know both sides of the car have dampers but Im wondering if there is another one by the heater core and evaporator? any help would be greatly appreciated.