Redesigned for 2015 is the GMC Sierra 2500HD. With nearly two-thirds of the Sierra cab structure made from high-strength steels, it's a fortress of strength that contributes to the Sierra's quiet cabin. With innovative features such as an integrated rear bumper corner steps for easy access to the box, four upper tie-downs to help you manage cargo of many shapes and sizes, and available EZ-Lift and lower tailgate the 2500HD helps you go from working harder to smarter. Choose from the advanced DURAMAX diesel in the Sierra 2500HD that delivers 397hp and 765 lb ft of torque or the 6.0L V8 VVT engine. With maximum conventional trailering capacity of up to 14,000 lbs and fifth-wheel trailering capacity of 17,900 lbs the 2500HD is up to most tasks you put it through. Standard Trailer Sway Control Technology keeps both you and your trailer heading in the proper direction, automatically using sensors to detect the rocking of a swaying trailer, and then applying the brakes to help bring it back in line. From the exceptional storage space in the center console, to comfort and convenience features, Sierra 2500HD is designed to give you the comfort you deserve. The available 8 diagonal Color Touch Radio with next generation IntelliLink lets you customize your media and connect to your world with features such as bluetooth and navigation. Opt for the 2500HD Denali and enjoy additional features such as heated and cooled driver and passenger 12-way power adjustable seats, heated steering wheel, and a Bose Centerpoint surround-sound system with SurroundStage signal processing.