GMC 2018 GMC Yukon XL SLT 2018 GMC Yukon XL SLT SPECIFICATIONS, PRICE & IMAGES Fuel Type: Gasoline Exterior Color: Onyx Black City MPG: 16 Interior Color: Jet Black Highway MPG: 23 Drivetrain: RWD Transmission: 6-Speed Automatic Engine: 5.3L V8 16V GDI OHV Car Features Hot Car Deals! 2014 Jeep Grand Cherokee Laredo 2019 Hyundai Tucson Sport 2019 Ford Mustang GT Premium 2015 Mercedes-Benz GLK 350 2020 Jeep Gladiator Sport 2019 Porsche 911 Carrera S 2011 GMC Terrain SLE-1 2017 RAM 1500 Lone Star