I'm trying to help a friend determine what is wrong with his 2008 Cobalt. He was driving home from work Friday when the gauges began acting erratic and the radio started flashing on/off. He checked the battery which was dead and replaced it, now the car will crank but neither the radio nor other electronics will work properly, further inspection revealed issues with the power steering as well. My first thought since it would crank with a hot battery was the Alternator, I've heard of issues with the Power Steering on Cobalts but really am not sure what is going on. Any help is much appreciate.