OMG... my factory radio did the same exact foolishness. I have a 08 cobalt LS. I bought my car brand spanking new. A year after owning it.. I was on a road trip and the sound on my radio just stopped working?? The next day, I turned my car on and the radio/sound worked fine. On my road trip back home, the stupid mess did it again!? No sound. I took it back to the dealership and had them give me a new radio since the car was under warranty. They put a new (factory) radio in. I'm thinking all is good. 3yrs later, this radio is doing the same exact crap...lol The factory radio's im thinking with these cobalts are just third world ugly and poorly made.