Driving today with no problems. Went to unhook trailer and truck would not start. 7700 miles. Had power but nothing when I turned the key. Code came across saying the 4 wheel drive systems needs service. I called dealer - spoke to mechanic - he told me to jump the truck or disconnect battery for a minute or so and then re-connect - saying its reboots the computer Well I got it started, let it run for a while - I needed to load trailer. I took off slow around the corner then pulled onto the hiway. Needless to say I had no power - all my gauges went to the off position - like when you shut your truck off, and basically was in idle and limped back to the shop which took about 15 minutes by the time I managed to turn around and re-route myself. Anyone with an idea of problem? It won't start at all right now. There saying dealer will have to tow truck to there shop.