OK, sorry to stir up this thread again, but I had an opportunity to test some stuff today. I was on a 5 mile stretch of really bad washboard concrete (I890 West from Schenectady, NY to I90). I tried different speeds from 45 to 70 and watched carefully in my mirrors. My 07 DC did not have any bed bounce at all.
Not that I'm complaining mind you, but something has to be different with the trucks that do have a problem.
