Update - Key fob issue only happens at home. If I get 3 or 4 houses away from my house Fobs work fine for both vehicles. Nothing new at my house. Hmmmm....
I have 2020 Sierra Denali HD gas. The same problem started today with both key fobs. Here's the kicker. I also have a 2021 Cadillac XT5. The same problem started with both key fobs today as well!!! What the hell is going on??