My 2019 Silverado LT Crew is doing the same thing. I've taken it to the dealer twice with the 2nd trip, they kept it for 2 weeks while I had the pleasure of driving a Trax for that time (?). They finally replaced the radio on their own dime (GM claims it's my iphone 12), which I'm grateful they did. It worked great for about a week and now it's back at it. Not as often, but at least 3 times a week. I'm so frustrated since this is my work office and it's embarrassing while talking to clients. I'm ready for another truck....