Westin 15-18 Chevy Silv 25/3500 Dbl Cab (6.5ft)/Dually (8ft) Platinum 4 Oval WTW Nerf Step Bars - SS2018 Chevrolet Silverado 2500 Extended Cab Pickup 78. 8 Bed, 2015 2017 Chevrolet Silverado 2500 Extended Cab Pickup 78. 9 Bed, 2015 2019 Chevrolet Silverado 2500 HD Double Cab Pickup 78. 8 Bed, 2015 2019 Chevrolet Silverado 2500 HD Double Cab Pickup 97. 6 Bed, 2015 2018 Chevrolet Silverado 3500 HD Double Cab Pickup 78. 8 Bed, 2015 2018 Chevrolet Silverado 3500 HD Double Cab Pickup 97. 6 Bed, 2015 2019 GMC Sierra 2500 HD Double Cab Pickup 78. 8 Bed,