Both the interior and exterior have been redesigned to match that of the Sierra light-duty full-size truck launched last year. The CornerStep bumper and LED taillights in the bed also join the fray.
For 2014, the gasoline-powered GMC Sierra gets a new standard 4.10 rear axle. The previous 3.73 axle remains optional. Also new are an available spray-in bedliner and the expansion of the bi-fuel gas/CNG 6.0-liter V8 to the 2500 model line.
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.