PERFECT FIT: Direct fit for 2007-2018 Silverado Sierra 1500 Crew Cab (5.5' Bed)(Excl. 2007 Classic) AWARD-WINNING: Award winning 1-piece notched bar design features over 2 more step area than competition, with high traction die stamped steel step plates. PREMIUM QUALITY: Constructed from mild steel for high strength, E-coated and powder coated for durability, corrosion resistance, and great looks. Designed in the USA by Westins in-house engineers using OEM CAD data, and extensively tested on vehicle to ensure perfect fit and performance. EASY TO INSTALL: Easy bolt-on installation with no drilling required. All installation hardware, mounting brackets, and DIY installation instructions are included. HASSLE-FREE: Backed by a comprehensive 3 year limited warranty against manufacturing defects.