Vehicle Overview 2011 Chevrolet Avalanche's Midgate opens to extend cargo-bed length from 5.3 feet to 8.2 feet. With improved aerodynamics and a strengthened chassis, the monochromatic exterior features wraparound fascias that eliminate bumper-to-body gaps. Storage compartments alongside the cargo box include drains and provide lockable space and a three-piece rigid cargo cover with interlocking panels is available. A sleek windshield angle extends into a smooth roofline, the front air dam is low and wide and prominent fenders with integrated wheel flares complement the bulging power-dome hood. A wide front and rear track enhance stability. Optional Equipment The Z71 Off-Road Package includes 18-inch wheels, the Z71 suspension, tubular assist steps, locking rear differential and a skid-plate package. Available articulated running boards automatically move downward and outward as the doors are opened. Individual options, depending upon trim level, include Ultrasonic Rear Parking Assist, a rearview camera system, navigation system, DVD backseat entertainment system with an eight-inch screen, XM Satellite Radio with real time traffic assist for navigation equipped models and 20-inch wheels.