The document provides information on the 2011 GMC Sierra, including the new Sierra Hybrid model. It discusses the Sierra Hybrid's improved fuel efficiency over other full-size pickups, with an EPA-estimated 33% increase in city fuel economy. The Hybrid uses proven NiMH battery technology and a two-mode hybrid system to run on electric, gas or a combination of both for maximum efficiency. It maintains full towing and payload capacity while saving owners money on fuel costs. The heart of the hybrid system is a 6.0L V8 engine paired with an electronically variable transmission and regenerative braking for optimal performance and efficiency.