2015 GMC Yukon Denali EcoTec3 6.2L V8 6-Speed Automatic Electronic with Overdrive 4WD 4D Sport Utility Onyx Black AS-IS Vehicle, 4WD. GMC engineers concentrated on every aspect of the Yukon to reduce cabin noise, resulting in an unparalleled driving experience as well. From its confident, aerodynamic proportions to its premium accents and refined finish, this sport utility vehicle lives up to its looks with superior capability, comfort, and towing capacity.