Westin 23-71680 E-Series Step Bar Westin, 23-71680, E-Series 3 in. Round Step Bar Cab Length, Single Step Pad - Polished Stainless Steel - Incl. Stainless Steel Brackets - Mount Kit Included - Rocker Mount Nerf/Step Bar,Side Steps and Nerf Bars,Exterior Accessories,E-Series 3 in. Round Step Bar Cab Length,23-71680,Westin,Sierra 1500, Sierra 2500 HD, Sierra 3500 HD, Silverado 1500, Silverado 2500, Silverado 2500 HD, Silverado 3500 HD, Chevrolet, GMC, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003