GMC 2018 GMC Sierra 1500 Base 2018 GMC Sierra 1500 Base SPECIFICATIONS, PRICE & IMAGES Fuel Type: Gasoline Exterior Color: White City MPG: 17 Interior Color: Black Highway MPG: 22 Drivetrain: RWD Transmission: 6-Speed Automatic Engine: 5.3L V8 16V GDI OHV Car Features Hot Car Deals! 2020 Chevrolet Tahoe LT 2018 GMC Sierra 1500 SLT 2018 Ford Fusion SE 2015 Kia Optima LX 2020 Toyota Camry LE 2018 Dodge Durango SXT2020 Acura RDX w/A-Spec Pkg 2020 Hyundai Santa Fe SE 2.4