Had them on the 2004 Duramax 3/4 HD. Loved them, took them down to 5lbs when not towing and the ride was great. During towing I put 45lbs in them and the towing difference was incredible. The bouncing that it would do on concrete road was minimized. Side to side stability was much better.
I would always make sure the air was out of the bags when not towing, because if I left the air in, the rear end would hop all over the place on speed bumps.
I hhaven't put them on "BB" yet, but am going to even though I don't really need them, it being a one ton dually. I do still experience the hopping on concrete roads, and feel this will help. Kind of like a set of "snubbers" back there
