YUKON XL 4WD DENALIENGINE, 6.2L ECOTEC3 V8TRANSMISSION, 10-SPEED AUTOASSIST STEPS, POWER RETRACTABLE W/ PERIMETERLIGHTINGSUNROOF, POWER, DUAL-PANE,PANORAMIC22" POLISHED ALUMINUM WHEELS • WHEEL LOCKS (DLR INSTALLED)ADAPTIVE CRUISE CONTROL • ENHANCED AUTOMATIC EMERGENCY BRAKING (REPLACES STANDARD AUTOMATIC EMERGENCY BRAKING)ONYX BLACK MAX TRAILERING PACKAGE: • EXTRA CAPACITY COOLING SYSTEMPROGRADE TRAILERING SYSTEM• TRAILER SIDE BLIND ZONE ALERT• TRAILER BRAKE CONTROLLER• HITCH GUIDANCE W/ HITCH VIEW EQUIPPED WITH2-WAY LUMBAR