Long regarded as the twin of the Chevrolet Silverado, the 2009 GMC Sierra 1500 offers more differentiation from its General Motors stable-mate in looks, while sharing the same basic architecture and engine choices. Exclusive to the GMC Sierra line, though, is the Denali trim level that brings with it a variety of power and luxury features. Looking to extend their leadership in the pickup truck segment, GM engineers and designers have created a new breed of pickup, one offering an improved chassis, more precise steering and not one but two quieter, more upscale interiors. The Sierra also delivers segment-leading fuel economy thanks to the new line of Active Fuel Management-equipped V8 engines and the introduction of the 2-Mode hybrid model.