I'm not knocking any road service,but a couple of years ago,I had a problem with my Excursion PSD that wouldn't start after a meal stop outside of Mt Raineer N.P. I called Good Sam and after discussing the problem,she said she'd get a tech on the line. She came back a few minutes later and said they were all busy,holiday sunday PM, but that one had sent her a list of suggestions to try. The first one was the right one,fuel pump reset button under the dash on the passenger side, and I reset it and was on the way. Never would have known about it and never would have found it w/o the instructions he had sent to her.
So,I would say that they have tech service also.