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/AVvXsEjhcnRwY5WglEDkn_15SOiLsLeVxKm9vIX3QkucKlReQBBMSAATV2SIQNOUBAk6OaOXHN_GajANX2U9ogbeZOT-71qeIYxPEzH-_AAAoE4Ow5BmbnrGVwlfmUM1sYMjGLZo9z96wN4sXmGA/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/AVvXsEgP2KNYn3B1JCwv7JvUeoir0yzCfG6Ow8yCOGAzYfGcSrcoZsX5NGVNi5IqTXLp77Rlxz4QWnWwkodjBy5Zxbq7py5WoeiWmWlB0m1_M3fD4XkPxiYmWRTUVf81Y2tZUvWe_rmy6oSyUiXL/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/AVvXsEjPtLQAQoLMN-nj3pdWdE3-eUUvEFz0ogez5gJtQbWWCOjZLZPXgxIg4a2zipawJEDZfqeKdnkVo3B32iX54TaGIvcuUpxaKuU_c6ih7QVmzQTFFjAuR6JbrSJY_BaZZl3vW4RQe_Ie-95U/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/AVvXsEjEHBAmvA054wGt9AO6oE_7jQrwo1dExC6FoYu4XkfKIkyKr1Qthwfvce_QWhkBMQuqZWjE9dYY8IizkXeFn7mEqmnAwCP0VB1C44uCTACYjrmJrW4qZg6stW0o1a2juW3J6rrub7V1SzOt/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/AVvXsEilsqs6RhOnKD7cPlXMO3umTvzTopRZxn_t3DLO1eDRezVMhwIzv8z0exuRL-LK90du1u2HWEHruQ1d79UqFuhcRMGOgIZD4OdMLVKtfofDNelBQSjQUHra55ZRaicTNFA5dG1FoHlpCMoT/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/AVvXsEhl6yGJv1jrlUH-_FeuXWUppV8vd-KT2xKCABfEmdG8kB27QiOnFdp437PmQrAd5_gtP9ESEuoPly5z5ct0t8_xLgE6Rret9uJrmjbLiMg4aDF6ZRHL_dI5A7pw79xcflK5nE9p252iS5j7/s400/2011-GMC-Sierra-Denali-HD-Side-580x386.jpg)