Update. I got the truck towed to the dealership on Saturday afternoon. They were closed on Sunday. Monday they diagnosed the issue and I will be getting a new brake control module/master cylinder installed. This item is on back order..... Like others on this thread, I think I may be waiting awhile.
Saturday the only loaner they had as a clown car (2019 Sonic RS). Monday I went and traded it out for a Colorado. At least that is four wheel drive. I need it to go Elk hunting next week. That car would not even hold a little ice chest.