CARFAX One-Owner. Clean CARFAX. Blue 2012 GMC Sierra 1500 SLE 4WD 6-Speed Automatic Vortec 5.3L V8 SFI VVT Flex Fuel 6-Speed Automatic, 4WD, Cloth. Recent Arrival! Reviews: * Smooth, quiet ride, comfortable seats, powerful V8 options. Source: Edmunds