I got a 2021 Sierra Crew Cab 1 1/2 months ago and while I really like the truck the radio (8" screen size is all I know about my radio) is driving me NUTS! About 60% to 70% of the time when I start the truck up the volume is twice as loud as I had it set and it turns the Auto Volume off (I set the Auto Volume to medium). It could happen when I first start it or after I shut it off, go in to a store and then restart it. Any ideas or is this a call to the dealer to have them tell me they have never heard of that problem?