【Note-1】 This Item Fits The Vehicle With Dual Rear Wheels And Wide Track. 【Note-2】 For 2011-2012 & 2014 Chevrolet Silverado 3500 HD Only Fits The Cab & Chassis Body Style. 【Note-3】 For 2011-2012 GMC Sierra 3500 HD Only Fits The Cab & Chassis Body Style. 【N