U-drive 4" inch Oval Stainless Steel side step Nerf Bar Running Boards for 99-13 SILVERADO/SIERRA 1500/2500/3500 EXT CAB (With 2 full size front doors and 2 half size rear doors) Only fit 99-13 SILVERADO/SIERRA 1500/2500/3500 EXT CAB (With 2 full size front doors and 2 half size rear doors) 4" Inch Oval Style Stainless Steel Tube + Slip-Resistant Plastic Step Pads Made from heavy duty T304 Stainless Steel Direct Bolt-On in Assembling Finished Surface is Mirror Polished, Shiny Chrome Color