I just bought a used 2006 G6. I love the car except for a few issues. The day after I bought it, the battery went dead and had to take it back for them to put a new battery in it. That is when I found out everything runs through the radio. Now, went to listen to a CD and after about 10 minutes it says check disk then no disk. Then you know how you have 3 setting for the radio iteself, FM1, FM2 and AM? It stays on one and wont change to any of the others. Seems to reset itself after the car is off for awhile. Any ideas as to what is causing this? I have tried a few CD's and it does it with all of them so it isn't the disc's themselves.