These bushings are often overlooked when upgrading the suspension of a 4WD. Leaf spring bushings stabilize the movement of the rear axle. Inferior, worn or damaged bushings in this area will cause the solid rear axle to move and impart rear end passive steer to the vehicle. It also causes the vehicle to "wander" all over the road and be unstable under heavy braking. This can be especially noticeable carrying a load or towing a boat, RV or any significant trailer. The OE rubber bushings are designed to work at standard ride height with standard wheels and tires and with standard loads. By fitting SuperPro Bushings the rear end of your 4WD will handle just about anything you can throw at it!This Part Fits: Year Make Model Submodel 2007-2014 Chevrolet Silverado 2500 HD LT 2007-2014 Chevrolet Silverado 2500 HD LTZ 2007-2014 Chevrolet Silverado 2500 HD WT 2007-2014 Chevrolet Silverado 3500 HD LT 2007-2014 Chevrolet Silverado 3500 HD LTZ 2007-2014 Chevrolet Silverado 3500 HD WT 2011-2014 GMC Sierra 2500 HD Denali 2007-2014 GMC Sierra 2500 HD SLE 2007-2014 GMC Sierra 2500 HD SLT 2007-2014 GMC Sierra 2500 HD WT 2011-2014 GMC Sierra 3500 HD Denali 2007-2014 GMC Sierra 3500 HD SLE 2007-2014 GMC Sierra 3500 HD SLT 2007-2014 GMC Sierra 3500 HD WT
