Bull Bars are high quality, adding extra protection to the front end of your vehicle, also protecting the undercarriage of your vehicle from extreme dips and bumps with its skid plate. The bull bar sits flush with the front end providing maximum ground cl. GMC SIERRA 2500 HD 2011 GMC SIERRA 2500 HD BULL BAR 4inch BULL BAR WITH STAINLESS SKID Grille Guards & Bull Bars Stainless Products PERFORMANCE 2011