I just had this happen to me in my 2024 2500 Silverado. Called the dealer ship they said bring it in next week so they can look at it. I asked have they had this issue before he said no. I asked what could the problem be he said it could be a number of different things. I asked would a scan tool pick up the problem he said no. To me there is no need for me to bring it by there if you can't scan it to find the problem. Long story short I remember I was having a problem with the truck updating, left the driver door opened for a few minutes the computer reset itself. I asked my salesman about it, he told me that's how they do an update without physically doing it with the computer. I left driver door open heard truck rest itself, red triangle with exclamation mark and red line on OnStar button is gone. Radio and OnStar back to normal. If this happens to anyone else on here open drivers door for 10- 15 minutes listen for the sounds I. The truck when it stops making sounds it's done. See if that works on your vehicle as well
