I have a 2017 Silverado that does the same stuff. the radio will be fine for a while then it will turn on and I can see everything but I have no sound. It will work for 15 mins then stop, then it randomly starts again. I have had it at the dealership a few times and they can't figure it out. the harness has been replaced, the radio has been replaced and I am still having trouble. The big issue is that now I can not use my hands free phone while I drive and the state if IN has made it illegal to be on the phone unless it is handsfree.
