Kryptonite KR1426 Lower Bump StopsThe Kryptonite Lower Bump Stops KR1426 will replace the dry rotted units in your GM Silverado Sierra 2500HD 3500HD. Over the years, the bump stops on your pickup will begin to fail due to the suspension contacting them while driving. As the bump stops begin to fail, they can cause a harsh ride on larger bumps due to the lower control arm hitting the bump stop mount which can cause damage to the suspension. Kryptonite recommends swapping out the bump