Radio/tape Cd Player problems of the 2009 Saturn VUE

Approximately July 2013, my instrument panel lights and radio shut off. The service stabilitrak warning message came on and then went off. I was unable to take the key out of the ignition. After moving the battery, the lights turned on and I was able to start the car. This lasted for an hour. It happened again and moving the battery worked. I took it to lou fusz GMC Buick. They tested the alternator, battery, and all of their components. They were fine. I took it to them in August, September, and October. I thought the problem was caused by the battery not being secured or I needed a new battery. I had the battery replaced by lou fusz in January 2014. Everything seemed to be fine until earlier this month. The same symptoms and issues happened again. I currently have the vehicle at a gm service center hoping they can resolve the issue. There is something seriously wrong with this vehicle. I am afraid to drive it. My concern is it may be overheating causing the wires to burn. There are other reports of the same issue with the 2009 Saturn Vue. Please assist me in resolving this matter.