Delivers 18 Highway MPG and 14 City MPG! This GMC Yukon XL delivers a Gas V8 6.2L/ engine powering this Automatic transmission. TRANSMISSION, 10-SPEED AUTOMATIC electronically controlled with overdrive, includes Traction Select System including tow/haul (STD), TRAILER SIDE BLIND ZONE ALERT, TRAILER BRAKE CONTROLLER, INTEGRATED.*This GMC Yukon XL Comes Equipped with These Options *MAX TRAILERING PACKAGE includes (ZL6) ProGrade Trailering System and (V03) extra capacity cooling system , TIRES, 275/50R22SL ALL-SEASON, BLACKWALL, SUNROOF, POWER PANORAMIC, DUAL-PANE tilt-sliding with express-open and close and power sunshade, SMART TRAILER INTEGRATION INDICATOR, SEATS, FRONT BUCKET (STD), REAR AXLE, 3.23 RATIO, ONYX BLACK, LPO, WHEEL LOCKS, SET OF 4 (dealer-installed), HITCH VIEW with image adjustment, Pan/Zoom, ENGINE, 6.2L ECOTEC3 V8 with Dynamic Fuel Management, Direct Injection and Variable Valve Timing, includes aluminum block construction (420 hp [313 kW] @ 5600 rpm, 460 lb-ft of torque [624 Nm] @ 4100 rpm) (STD).