I have the 22 refresh elevation. Having the same issue with the speakers cutting out. I just pull over and disconnect the battery for 10 seconds and reconnect. Not ideal but unfortunately until GM figures out this issue this is the only way I have found to fix it immediately. Also are you guys having issues with the parking Brake automatically applying when hitting the park button. And I'm pretty sure it's sticking cuz my rear brakes are already sounding like metal on metal with 3k miles on it. Smdh.