Official Word:

GMC's Denali brand represents the most premium and powerful models of the Sierra, Yukon, Yukon XL and Envoy lineups, but the Denali badge has never been applied to a heavy-duty truck - until now. Designers and engineers developed the Sierra HD Denali concept todemonstrates how the Denali ethic translates to GMC's most capable trucks. They started with a Sierra 2500HD crew cab and infused it with all of the features and accoutrements expected of a Denali,...Read.