Elevation: 5.3L V8, 16.8″ Infotainment, Bose Audio, 20″ wheels, Heated seats. AT4: Off-road focus with Magnetic Ride Control, skid plates, red recovery hooks, available 6.2L V8, enhanced 4WD. Denali: Premium luxury, available 6.2L V8, Head-Up Display, massage seats, unique wheels. Safety & Driver Assistance HD Surround Vision, Forward Collision Alert, Lane-Keep Assist, Blind-Spot Monitoring. Available Super Cruise hands-free driver assistance.