2007 2008 2009 2010 2011 2012 2013 GMC SIERRA Crew Cab black Side Steps Bar Running Boards Provide great styling and functions for easy entry / exit of the vehicle. Never Rust! Aircraft alloy which is powder coated black. it is rated for over 500 lbs of stepping force. enclosed shell with i beam for better support. Complete with mounting kits for both sides and bolts hwere needed. High strength/Light weight and save gas! measures 2" high & 4 1/2" wide.