APS Premium 4" iBoard Running Boards Fit 01-13 Chevy Silverado/GMC Sierra Crew Cab EASY TO INSTALL - iBoard package includes set of 2 running boards, mounting brackets & hardware for an easy bolt-on installation Massive 4 Inch Wide Solid One Piece Bars, Provides a Wider step area for Secure Footing. Hairline Texture Polished 6061-T6 Aircraft Aluminum Boards, the Highest Standard of Rust and Corrosion Resistance. iBoard Surface Covered with Full Length, Premium Quality UV Resistant Non-Slip Rubber. Body Frame Mount (No Drilling Required), Fit: 2001-2013 Chevy Silverado / GMC Sierra 1500 Crew Cab & 2001-2014 2500/3500 (Excl. C/K Classic)