Got my 2007 GMC cc 3500 4x4 month ago and pulled a new H&H 20' enclosed car trailer from Iowa to Corona CA. Of the 4 Duramaxs that i have personally owned this one in stock form is the nicest, smoothest, quietest and by far the most powerful in stock trim.

Whips my old 03 dodge cummins hands down as well.

know where i can get a good tuner for it? want to ask questions about it? let me know.

Craig Hull
H&H trailers