Originally the AC wasn't blowing out cool air. Adding coolant did not resolve the problem. Took car to have it evaluated. Having to give it a full tune up was the least of my worries. Hearing the mechanic say the computer was malfunctioning and that it was not only effecting the cylinders but the transmission. That all but took the cake. I am so tired of the large auto bills and hearing that it's not worth fixing. It is my only car I am not in the position to put myself in debt buying a new car right now. Chevy get your s _ _ _ _ together. People drive their families around in these cars, safety first.