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! 2019 RAM 1500 Longhorn 2020 Lexus RX 350 2020 Chevrolet Blazer RS 2020 RAM 1500 Laramie 2020 INFINITI QX60 Luxe 2020 Jeep Renegade Latitude 2019 GMC Sierra 1500 SLT 2019 Honda Accord LX