Alright I have a 2001 grand prix gt, and when I turn on my ac or heat it blows out of every hole, the defroster, feet, and straight.no matter what setting I put it on it doesn't change. I have no control over it besides if I want cold or hot. Is this a simple fix or am I gonna just have to live with it. Or go to pick n pull and grab a part? Help please it's hottt.