The 2013 GMC Sierra 2500HD is part of the third generation of Sierra HD trucks. With available rear-wheel or four-wheel drivetrain, its engine options include a 6.0-litre V8 that delivers 360 horsepower and a Duramax 6.6-litre turbo diesel V8 pushing out an impressive 397 horsepower. Both engines are mated to six-speed automatic transmissions. Trim levels range from the base Work Truck to the high-end Denali, each offering a unique set of features. Safety features include standard front airbags, antilock brakes, and StabiliTrak electronic stability system with trailer sway control. It also features the latest infotainment system with options for satellite radio and Bluetooth, among other tech highlights. This truck proves its mettle in the heavy-duty league with its outstanding towing and hauling capabilities.