The GMC Sierra 2500HD takes you to an unparalleled level of refinement. 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 6.6L V8 turbo in the Sierra 2500HD that delivers 445hp and 910 lb-ft of torque or the 6.0L V8 VVT engine with 360hp and 380 lb-ft of torque. With maximum conventional trailering capacity of up to 14,500 lbs and fifth-wheel trailering capacity of 18,100 lbs the 2500HD is up to most tasks. 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-inch 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. Available 4G LTE makes your truck a Wi-Fi hotspot. 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.