The Sierra is a pick-up truck of the U.S. automobile manufacturer GMC, part of the General Motors group. The built since 1999 GMC Sierra, the platform shared with the Chevrolet Silverado and brother group is offered in three different body styles: two-door model with and without double cab and four-door. When the equipment options you can choose between the models GMC Sierra 1500, 2500HD, 3500, and the flagship Denali. The top version of GMC Sierra Denali features a 330-hp 8.1-liter V8 engine with a maximum torque of 514 Nm. Even stronger is the diesel version of GMC Sierra 2500HD. My eight-cylinder turbo-diesel engine delivers 360 hp - automatic only, otherwise 300 hp - and reached a massive 880 Nm of torque. A permanent four-wheel drive brings this power to the road, switching takes over a four-speed automatic. The GMC Sierra pick-up there is an option for both a hybrid and a FlexFuel variant.