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For 2013, extended-cab 2500 HD models equipped with the standard 6.0-liter V8 can be had with a new bi-fuel system that accommodates both gasoline and compressed natural gas (CNG). Two new exterior colors (Sonoma Red Metallic and Heritage Blue Metallic) round out the changes.
The 2012 GMC Sierra HD sees a few improvements for this model year. A new hard-drive navigation radio is offered, while Work Truck models gain cruise control and lockable spare tire. Denali trims gain as standard equipment heated and cooling front seats, a heated steering wheel, a rearview camera and, on 3500 dually models, 17-inch polished wheels.
The 2011 GMC Sierra HD's Duramax turbo diesel's power, torque, maximum conventional and fifth-wheel tow and payload ratings are best in class. Its fifth-wheel tow capability is 21,700 pounds, it can tow up to a 17,000-pound conventional load with its factory-installed hitch, and the Duramax is fully B20 biodiesel compatible.
Technical upgrades include the addition of Bluetooth hands-free communication technology to OnStar 8.0, as well as Destination Downloads for vehicles equipped with DVD navigation. Extended and Crew Cab trims offers a rear backup camera, while a stability enhancement system is made standard on the 2500 HD with single rear wheels.
When you need a full-size truck to haul heavy objects, the muscle provided by the 2015 GMC Sierra HD will be more than sufficient. Like the 2015 Chevrolet Silverado 2500 and 3500 HD, the Sierra HD is General Motors' other answer the Ford F-Series and Ram HD trucks. Both the Sierra 2500 and 3500 HD offer you the choice of a 6.0-liter V8 gasoline engine or a 6.6-liter Duramax turbodiesel V8, as well as rear-wheel-drive and 4-wheel-drive configurations. The choices go on from different cab configurations and bed lengths to trim levels. Even though it's not the best heavy-duty truck in its class, the Sierra HD offers plenty of muscle to get the job done.