CARFAX One-Owner. Summit White 2020 GMC Sierra 1500 4WD 6-Speed Automatic EcoTec3 5.3L V8 120-Volt Bed Mounted Power Outlet, 120-Volt Instrument Panel Power Outlet, 1SA Driver Alert Package I, 6-Speaker Audio System Feature, Chrome Mirror Caps, Convenience Package, Cruise... via HomeNet, Inc.