A midsized SUV, the Graphyte is the first vehicle GMC is showing to use the Advanced Hybrid System 2 (AHS2), which combines the Vortec 4800 V-8 that includes Displacement on Demand cylinder shut-off, and full electric propulsion at lower speeds. The calculated fuel savings over normal driving is said to be 25 percent when compared to a normal midsize SUV. Riding on 22-inch wheels, offering an adjustable ride-height suspension, and debuts the first rotating rear hatch/tailgate system. Inside, the Graphyte makes driving a push-button affair, while maintaining a professional-grade appearance.Click to watch the General Motors and Saturn Combo Video.