https://www.dfwairport.com/shuttles/...op=10&toStop=3
I played around the above web site. Found some useful info, but unable (maybe due to my own short coming) to nail the "sequence by which the bus stops). A few images from copy/paste:
RCC is Rental Car Center
Terminal D to/from RCC
Terminal C to/from RCC
I actually spent (wasted) 20 minutes watching the "real time Bus" moving. Here is my uneducated (due to incomplete facts) guess. From RCC, the bus probably goes to Terminal A first, then B, then D, then C, then E ?????