PowerStep Plug-N-Play Automatic Power-Deploying Running Boards fits 2015-2016 Silverado/Sierra 2500/3500 Diesel Only Double and Crew CabGetting into your truck shouldn't feel like climbing Mount Everest. That's why AMP Research invested in POWERSTEP, the automatic, electric-powered running board that instantly extends when you open your door, and then hides itself safely out of sight when the doors close for improved ground clearance, aerodynamics and appearance. Its handsome design, all-weather performance and legendary reliability set the industry standard. Built-in LED Lights Great For Lifted Trucks Built-in LED Lights Holds Up 600 lbs. Automatically Extends When Door Opens Holds Up 600 lbs. Automatically Extends When Door Opens Add Wow Factor To Your Truck w/AMP PowerStep XL Running Boards 3 in. Lower Stepping Surface Than The Regular PowerStep Great For Lifted Trucks Designed And Built In America Optional Stainless Steel Trim 3 in. Lower Stepping Surface Than The Regular PowerStep Application Summary: Year Make/Model 2015-2016 Chevrolet Silverado 2500 HD 2015-2016 Chevrolet Silverado 3500 HD 2015-2016 GMC Sierra 2500 HD 2015-2016 GMC Sierra 3500 HD