I just purchased an 07 H3 as a toad for my motorhome. Imagine my surprise when Camping World said their Roadmaster braking systems would not work in the H3. Called Roadmaster and got the same answer. I'veseen the Hummers being towed, so I know that a system is available. For anyone towing an H3, what system ae you using? A Blue Ox, by chance? Thanks for your replies.