When you encounter slick or muddy roads, you can engage the four wheel drive on this unit and drive with confidence. Maintaining a stable interior temperature in the vehicle is easy with the climate control system. This 2007 GMC Sierra 2500 has a V8, 6.6L high output engine. The vehicle is outfitted with an OnStar communication system. It has a clear coated brown exterior. Easily set your speed in the vehicle with a state of the art cruise control system. Increase or decrease velocity with the touch of a button. Anti-lock brakes will help you stop in an emergency. With the adjustable lumbar support in this 2007 GMC Sierra 2500 your back will love you. The fog lights cut through the weather so you can see what's ahead. This 2007 GMC Sierra 2500 has an automatic transmission. It has a diesel engine. This three-quarter ton truck can tow almost anything.