My 2015 Chevrolet Silverado radio has been freezing up, radio playing and can't change the volume or channels at times. I have had the screen replaced, the radio itself replaced, the fuse block and it still does it sometimes. I was told by a Chevy tech that he drove it for a while, and it never did anything. My dash lights were flashing off and on, rpm hand and speed odometer hand going to zero and back up. Can someone tell me what the hell is going on with this truck, PLEASE!!!!!!!!!!!!