Rocker Arm Bottom & Cab Corner Both Sides (Key Parts #0856-503, 0856-501) Key Parts, Inc. is the gold standard in rust repair panels. Our state-of-the-art 135,000 sq. ft. warehouse in Lynchburg, VA and robust inventory management system help us ensure high replenishment rates on quality product, which reflects well on the body repair professionals who rely on them to make quality repairs easier. Rocker Arm Bottom & Cab Corner Both Sides (Key Parts #0856-503, 0856-501) Fits:00-06 Chevy Silverado 4 Door Extended Cab07 Chevy Silverado Classic 4 Door Extended Cab00-06 GMC Sierra 4 Door Extended Cab07 GMC Sierra Classic 4 Door Extended Cab