The 2017 GMC Sierra Denali 2500HD is the flagship of GMC's heavy-duty truck lineup, combining serious towing and hauling capability with genuine luxury appointments. Powered by the 6.6-liter Duramax turbo-diesel V8 paired with an Allison 1000 automatic transmission, it delivers confident performance in a dark granite metallic exterior with polished chrome 20-inch wheels. Inside, a Denali-badged leather-wrapped steering wheel, 8-inch IntelliLink infotainment, and two-tone cocoa and dune interior trim set the standard for premium work trucks. Read the 2017 GMC Sierra Denali 2500HD Review
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