2011-2012 GMC Sierra 2500/3500 HD Bed Step MOUNTS TO THE FRAME AT THE CORNER OF THE REAR BUMPER Fits 2011-2012 GMC Sierra 2500/3500 HD ENGINEERED TO SUPPORT UP TO 300 LBS CORROSION-RESISTANT, ANODIZED AND COATED FINISH DURABLE, NON-SLIP, GLASS-REINFORCED COMPOSITE STEP PAD