today announces the new 2011 Sierra Denali HD, the first offering of the exclusive Denali line on a heavy-duty GMC pickup. The Sierra Denali HD leads a comprehensively redesigned lineup of 2011 Sierra 2500HD and 3500HD trucks that go on sale in early summer – including the most powerful diesel engine in the segment.
![2011 GMC Sierra All Terrain HD Concept 2](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjq2mqdcr0oWQ-JJyZVvXPM8mWIMlZ34ORfqPCxWvOq567aE8UCQ_YodDUhm_4qfYNeoB6B0ZgIResEBkgIK-GAmjHn3dlrjkShH61cJx5IcKFiO41n_DHChtZCpbwWT-fBxELbD6sWfCmi/s400/2011-GMC-Sierra-Denali-HD-Front-580x386.jpg)
Sierra HD’s new 6.6L Duramax turbo diesel delivers 397 horsepower (296 kW) at 3,000 rpm and 765 lb.-ft. of torque (1,037 Nm) at 1,600 rpm.
![2011 GMC Sierra All Terrain HD Concept 3](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhqvJijSIa4LbVsmzSiiPRNSRi3OvzUqwXSIq9-hZkvSQaUKp82AiXaUYr455sMiIV3XONVVdJtgCUA3cRAGImTnUrKaSaKly5U6RRuuqTQRCy5zaPkEE7LazzFVHP3T4qBnsBYgQg__uyW/s400/2011-GMC-Sierra-Denali-HD-Front-Side-580x386.jpg)
The Sierra Denali HD comes exclusively on the 2500HD chassis, in a
4WD crew cab standard box configuration. A Vortec 6.0L gas V-8/six-speed automatic powertrain is standard and the new Duramax 6.6L turbo diesel/Allison 1000 six-speed transmission powertrain is available.
![2011 GMC Sierra All Terrain HD Concept 4](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgM9N2HeDTRcACIfvUQSsHzYQd6M0crFjXNtqujoN6mP-KyYCInXiBOsfUl2wSEtCt4yLy9fS3HdDQihWWpENH9vtZyAP8fetYSOPrQC2CIEDPFptJgzoUu5TwcudTsOQtj2kmd43MyaRgW/s400/2011-GMC-Sierra-Denali-HD-Front-View-580x386.jpg)
The iconic Denali four-bar, chrome grille with round air inlets distinguishes the Sierra Denali HD on the outside, along with body-color bumpers, chrome door handles, chrome accents and 18- and 20-inch polished forged aluminum wheels.
![2011 GMC Sierra All Terrain HD Concept 5](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhGmWu1S5eXR37W8k9ssBiv62kH8y_7ZZPOwMR5r63zqy4zQJNPGnfWU9hr9KfvF_QbjpvF5gvA4CK6HgRzTWki6rrRXABYEUnJ3kXCkOCqLQ8gp4jy6pniZMepMzySlp2inkq4MvES7aH3/s400/2011-GMC-Sierra-Denali-HD-Rear-580x386.jpg)
The balance of the new 2011 Sierra HD lineup is identified on the outside by new, three-bar grilles and powertrain-badged louvered hoods, along with a revised, full-width chrome steel front bumper and a new family of 17-, 18- and 20-inch wheels. It’s beneath the skin, however, where they are truly separated from their predecessors – and the competition.
![2011 GMC Sierra All Terrain HD Concept 6](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjRmbfJuaaHKIqQNWUz7wYs3BeO9wGGKPgY0UAkFz4N_6RdXxe-cOaRFhia23SnnVu146UId5n7N_Me3eHHwIUFPBW4qH5ds_tRp4htp2TuWpMPseTjxNXuGsHStFDm4_reP8ncnIOn7t-M/s400/2011-GMC-Sierra-Denali-HD-Rear-View-580x386.jpg)
![2011 GMC Sierra All Terrain HD Concept 7](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhF-2La4X5UXiDmXmVZJkxTHoMykK5cwEcitjervhc9Sg4K5gcFJ2Pvv-OJmEgVndfkI1GbaN4yYHgadDrTakjIbQ7WIMKT_kKl2EgWbwgKwz5HBnP73VJAYndrWiuS-UfRyMesBeAF_Bxl/s400/2011-GMC-Sierra-Denali-HD-Side-580x386.jpg)