My 2019 has had this intermittent issue since 1500 miles, truck is not even a year old to me yet. It's been to the dealer 4 times so far and the most that has been done is reprogramming and replacing the 360 camera module, nothing has worked. Went as far as updating all modules in vehicle as instruction from tech assist. Interior has been ripped apart checking wiring and all checked good from what I was told. They want me to leave it till they can figure it out, a harness and radio have been mentioned of possible issues. No help from customer assistance but that they need more time to use your vehicle as a experiment. I'd rather get rid of it at this point. I totally agree with the GM doesn't have a clue how to fix it. If anyone comes up with a fix please post! I'm willing to fix it on my own.