Radio Cuts out after car turns on
I have a 2011 Chevy Traverse. For the past few months our radio has not been working. The radio (AM, FM, and Satellite radio) all work fine when the car is on, but not totally turned over. Once I turn the engine over, the FM and Satellite radio cut out and does not work. The Chevy dealership told me to replace the radio and the alternator. I did both and still does not work.
I know there are 2 boxes in the back jack storage. I think one is XM and the other I am not sure. Any suggestions on where to go now?