Spied! 2011 GMC Sierra Denali Heavy Duty
Until now, the GMC Sierra Denali has only been available as a luxury light-duty pickup with a 6.2-liter V-8 gasoline engine. But at the 2007 SEMA Show, GMC showed off a diesel-powered Heavy Duty Denali concept, strongly suggesting that the 'Professional Grade' brand wanted to go head-to-head with Ford’s top-of-the-line King Ranch Super Duty.
Judging from the latest spy photo, it looks like GM is about to make its Denali HD concept a reality.
Our spies have just caught this 2011 GMC Sierra Heavy Duty pickup out and about, trimmed in Denali livery. It has a unique four-bar chrome perforated grille, instead of the three-bar grille we’ve seen in other Sierra test trucks. It also sports chrome trim, door handles and wheels – Denali hallmarks. Look even closer and you’ll see the bell of a large two-piece venturi tailpipe (which helps cool high exhaust temperatures) indicating that there’s a next-generation 6.6-liter "LML" Duramax V-8 under its hood. The uncamouflaged hood features new reverse-power-dome styling with prominent center mounted louvers.
GM's 2011 HD pickups are also expected to ride on an all new chassis and start production in the first half of 2010.

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