APS iBoard Running Boards (Nerf Bars | Side Steps | Step Bars) for 2001-2013 Chevy Silverado/GMC Sierra 1500 Crew Cab & 2001-2014 2500/3500 (Excl. C/K Classic) | (Black Powder Coated 4 inches) Innovative Patented iBoard Design Inspired by Smartphone Style, Deliver an Unique, Outstanding, Functional Appearance to your Vehicle. Massive 4 Inch Wide Solid One Piece Bars, Provides a Wider step area for Secure Footing. Polished 6061 Aircraft Aluminum Boards with Matte Black Power Coating, Best Rusting and Corrosion Resistance Compare to Other Brand Steel Bars on the Market. iBoard Surface Covered with Full Length, Premium Quality UV Resistant Non-Slip Rubber Pad. Easy DIY Body Frame Mount (No Drilling Required) and custom fit for your: 2001-2013 Chevy Silverado / GMC Sierra 1500 Crew Cab & 2001-2014 2500/3500 (Excl. C/K Classic)