Bonnie, IMO don't convert the Excursion. I owned a beautiful 4 x 4 2001 Diesel Excursion and labored long and hard before selling it and getting a Hummer to Tow and make into my daily driver. I loved my truck.:(
Greg is the only one here that tows an Excursion, and while I know it works, the question is " Are you pulling the Excursion, or Pushing the Bus". :eek:
Just my Thoughts, No matter what they are worth.
Gary S.