WCFAB 2001-2010 Duramax 60" Traction Bar Kit (RCLB/CCSB/ECSB)***This kit includes 60" long bars for Regular Cab Long Bed, Extended Cab Short Bed and Crew Cab Short Bed Models*** ***This kit is for 2001 2010 GM HD Trucks*** If you have Extended Cab Long Bed or Crew Cab Long Bed truck use part number WCF100852 If you have a Lift Kit and your U Bolts face up instead of down like factory, use Traction Bar Kit WCF100854 If you have a Lift Kit and your REAR lift Block is taller than 5" use part number WCF100852