Boasts 21 Highway MPG and 14 City MPG! This GMC Yukon XL delivers a Gas V8 5.3L/325 engine powering this Automatic transmission. WHITE FROST TRICOAT, TRANSMISSION, 6-SPEED AUTOMATIC, ELECTRONICALLY CONTROLLED with overdrive, tow/haul mode and tap up/tap down shifting (STD), TRANSFER CASE, ACTIVE, 2-SPEED ELECTRONIC AUTOTRAC with rotary controls, includes neutral position for dinghy towing.*This GMC Yukon XL Comes Equipped with These Options *SUSPENSION PACKAGE, STANDARD Increased capacity, Premium Smooth Ride with Air leveler, OPEN ROAD PACKAGE, (CF5) power sunroof, (U42) rear seat entertainment system and on SLT (IO6) Audio system with navigation, LICENSE PLATE FRONT MOUNTING PACKAGE, HD TRAILERING PACKAGE includes (GU6) 3.42 Axle Ratio, (JL1) Trailer brake controller, (Z85) Suspension Package and includes (NQH) transfer case, active, 2-speed with 4WD models , TRAILER BRAKE CONTROLLER, INTEGRATED, TIRES, P285/45R22, ALL SEASON, BLACKWALL, SUNROOF, POWER, TILT-SLIDING with express-open and close and wind deflector, SLT PREFERRED EQUIPMENT GROUP Includes Standard Equipment, SEATS, SECOND ROW BUCKET, POWER RELEASE, SEATS, FRONT BUCKET WITH PERFORATED LEATHER-APPOINTED heated and ventilated seat cushions, 12-way power driver and passenger seat includes 6-way power cushions, driver seat 2-position memory, 4-way power lumbar control and power recline (STD).