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! 2019 Ford Explorer Limited 2019 Acura RDX Technology Package 2019 Hyundai Sonata Sport 2019 Maserati Levante S GranSportCertified 2017 Kia Sportage EX 2018 Nissan Versa 1.6 SV 2019 Mercedes-Benz Base 2020 Jeep Cherokee Latitude