After returning from a week vacation, I turned on my tahoe and the stereo will not come on and the speakers don't work. This means that the noises/chimes for the blinkers, seatbelt being unfastened, etc also do not come on. Everything worked fine before I left for the trip and the car was not used while I was away. The clock on the stereo doesn't even come on. Does anyone have any idea of how I can fix this?