Thanks George,
This last episode was at a different dealer (closer) than the first time. I asked for a new battery and the answer was no. The battery tested ok and FoMoCo would not pay for a new battery. The first time I took it back to where I bought the car. I have a friend whose father is a semi-retired master mechanic (50 + years) at a yet again different dealer 40 miles from my home. He thinks it is an electrical problem. He said he would be happy to check it out.
One other question: My seat warmer is extremely warm on the low setting. I can only keep it on for a little while, then I usually manually turn it off. This last time the battery was dead I had only driven a short distance and had the seat warmer on. I hadn't turned it off manually. Do you think it could have stayed on for the next 3 hours? When I went out then the battery was dead. Is the seat warmer on your car VERY warm?