The new Powerstep Smart Series is the latest innovation to bring more control for the electric-powered running board right to your fingertips. Enjoy the in-app flexibility to override your steps to stay up or down, as well as power on/off the integrated or an auxiliary LED light system. PowerStep SmartSeries Running Board fits 15-20 Silv/Sra HD, Crw/Dbl Cab; Diesel Only 2015-2020 Chevrolet Silverado 2500 HD DIESEL Crew Cab Pickup, 2015-2020 Chevrolet Silverado 2500 HD DIESEL Double Cab Pickup, 2015-2020 Chevrolet Silverado 3500 HD DIESEL Crew Cab Pickup, 2015-2018 Chevrolet Silverado 3500 HD DIESEL Double Cab Pickup, 2020 Chevrolet Silverado 3500 HD DIESEL Double Cab Pickup, 2015-2020 GMC Sierra 2500 HD DIESEL Crew Cab Pickup, 2015-2020 GMC Sierra 2500 HD DIESEL Double Cab Pickup, 2015-2020 GMC Sierra 3500 HD DIESEL Crew Cab Pickup, 2015-2018 GMC Sierra 3500 HD DIESEL Double Cab Pickup, 2020 GMC Sierra 3500 HD DIESEL Double Cab Pickup