4 Wheel Drive, never get stuck again!! This Silver 2017 GMC Yukon XL is powered by a 5.3L V8 engine, and Automatic 6-Speed transmission. Need gas? I don't think so. At least not very much! 22 MPG Hwy... Safety equipment includes: ABS, Traction control, Curtain airbags, Passenger Airbag... Ressler Motors - 'Community Born Community Driven' *options shown may vary from actual vehicle - call to verify specifications