While on a return trip from South Dakota, we pulled off the interstate to visit Wall Drug. My suburban lost power while driving into the parking lot and would not start. We sent the boys to go through Wall Drug (which they were going to do anyway) and walked a block to Badlands Automotive. Explained what had happened and that I had no battery power. He lent us a portable charging device to get the truck going and we drove to his shop. Bad alternator. With in the hour we had a new alternator and we replaced the battery and were back on our way. THANK YOU!!!