Thought I'd jump in here. I have a 2005 Chev 2500HD Extended Cab, with the Duramax/Allison.I just put Bilstien 4600 shocks and Timbrens on mine. My camper is a 2013 Wolf Creek 850 SB. The camper now sits level and there is no sway. My tires are Michelin 235 85r 16 rated at 3042 lbs. I've since put quite a few highway miles pulling my 6 x 12 Cargo trailer, and just came back from a fishing trip in the mountains on some mighty rough roads without any problems. I had contemplated super springs but opted for the Timbrens and are pleased with them.
