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! 2017 MINI Hardtop Cooper SCertified 2016 Cadillac ATS 3.6L Luxury 2017 Acura RDX Technology PackageCertified 2016 Toyota Tacoma SR5 2019 Ford Mustang GT Premium 2016 Chevrolet Silverado 1500 LT 2020 RAM 1500 Laramie 2019 RAM 1500 Classic Tradesman