Offered in a base, SLE, SLT and a luxury-tailored Denali trim level, the all-new 2015 GMC Sierra 2500HD uses a great amount of high-strength steel to shape its bold design. Offered as a regular cab, double cab and crew cab model, the 2015 GMC Sierra 2500HD also presents a choice of a 6.5-foot standard or an 8-foot long box. The cargo box of the 2015 GMC Sierra 2500HD is features a number of upper tie-downs to secure payload. The SLE, SLT and Denali models of the 2015 GMC Sierra 2500HD includes a standard EX Lift-and-Lower tailgate as well as an LED cargo box light. Power for the 2015 GMC Sierra 2500HD is derived from one of three engines configurations. A gasoline-powered Vortec 6-liter V-8 engine generates 360 horsepower and 380 pounds feet of torque for the 2015 GMC Sierra 2500HD. This engine is also available in a bi-fuel version of the 2015 GMC Sierra 2500HD that is factory-equipped to run on compressed natural gas. Possessing torque delivery of up to 765 pounds feet, the 6.6 liter Duramax turbo-diesel is ideal for achieving the maximum potential from the 2015 GMC Sierra 2500HD pickup truck. A two-wheel and four-wheel drivetrain is available to convert engine power to momentum. The 2015 GMC Sierra 2500HD offers up to 4,306 pounds payload capacity and the ability to handle 14,500 pounds of conventional towing. On all models of the 2015 GMC Sierra 2500HD, Stabilitrak with Trailer Sway Control is standard. The interior of the 2015 GMC Sierra 2500HD features a 4.2-inch driver information center and an available IntelliLink system featuring an eight-inch touchscreen.