I bought the car last Thursday. It's a 2011 CTS premium coupe AWD 3.6. When I test drove it, everything seemed to work fine. Now, the control panel is going nuts. The temperature up button changes the stereo from am, fm, and xm. When you do turn the heat up to 80 or so where I like it, It goes all the way back down to 60 by itself. Everything else works for the most part except for the temperature control and the stereo which I guess both work off of the same panel I think? It won't read CDs either. The pop-up screen works the backup camera works all of that but the temperature control in the stereo or duking it out with each other so to speak. Could this be a temperature control module and panel, or should I just replace the computer and have it flashed to my VIN? Some feedback would be appreciated ASAP because I take the car back to the dealer to have them look at it Friday. Also I hooked my scanner up, and it's not throwing any codes either.