The 2011 GMC Yukon Denali is nearly a clone of the Cadillac Escalade, yet it largely lives in the 'Slade's shadow. All the same underpinnings are here: there's the Escalade's 403-horsepower, 6.2-liter V-8; its six-speed automatic transmission; and its full-time all-wheel drive system. Even its extra acoustic isolation measures to ensure a very...

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