GMC 2020 GMC Sierra 1500 SLE 2020 GMC Sierra 1500 SLE SPECIFICATIONS, PRICE & IMAGES Fuel Type: Gasoline Exterior Color: Onyx Black City MPG: 20 Interior Color: Jet Black Highway MPG: 23 Drivetrain: 4WD Transmission: Automatic Engine: Gas V8 5.3L Car Features Hot Car Deals! 2016 Kia Forte Koup SX 2019 Nissan Rogue Sport SL 2019 Audi A6 3.0T Premium PlusCertified 2016 Mercedes-Benz SLK300 2008 Chevrolet Suburban 1500 LT 2019 RAM 1500 Big Horn 2019 Toyota Highlander LE 2020 Chevrolet Silverado 1500 LTZ