General Motor’s GMC division will unveil its Denali XT, a sport-utility hybrid truck concept, at the 2008 Chicago Auto Show. The four-door Denali XT concept features a 2-mode hybrid propulsion system, E-85 capabilities and direct-injection technology. By using this technology, GM officials say the vehicle can produce the same amount of power generated by a larger engine, while simultaneously using less fuel and therefore producing lower emissions. The Chicago Auto Show will run from Feb. 6-17.