I have a 2017 Chevrolet sliverado LT. My radio quit working all together. Black screen 100% of the time. The only thing that works is the back up camera. I tried scrolling through all the options on the screen between the gauges and It just says "AUDIO OFF". I have tried disconnecting the battery twice. I have checked all the fuses. its been six months now with no radio ughhh. Any Ideas??