Polo Green Metallic 2006 GMC Sierra 1500 SLE1 RWD 4-Speed Automatic with Overdrive Vortec 5.3L V8 SFI Flex Fuel Vortec 5.3L V8 SFI Flex Fuel, 4-Speed Automatic with Overdrive. Recent Arrival! Wholesale to the public. This vehicle is sold AS IS, with no Warranty Implied or Promised. Not Reconditioned and at a Wholesale Price.