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The GMC Sierra 2500HD Denali adds tech features to work-truck utility (pictures)

With body-on-frame construction and a powerful diesel engine option, the Sierra 2500HD maintains work-truck capability while enhancing the cabin for the modern contractor.

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Wayne Cunningham
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1 of 33 Wayne Cunningham/CNET

GMC offers its Sierra line in models from 1500, 2500 and 3500, the latter two comprising Heavy Duty-classification work trucks. This is the Sierra 2500HD in Denali trim.

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For the Sierra 2500HD, GMC offers its Duramax Plus package, which includes this 6.6-liter turbocharged V-8 diesel engine, good for 765 pound-feet of torque.

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LED running lights trim the headlight casing.

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In Denali trim, the GMC Sierra 2500HD comes with crewcab and standard, 6.5-foot, bed.

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Denali trim upgrades the cabin considerably with many standard convenience features.

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The Sierra 2500HD Denali measures almost 20 feet long, and 6.5-feet high at the roofline.

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Four-wheel drive is a $3,200 option.

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The truck shows plenty of suspension lift, as the bed can hold almost 3,000 pounds.

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The ride quality is very bouncy over bumps, but that will change with a payload.

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GMC cuts little steps into the corners of the bumper, making it easier to step up into the bed.

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GMC lines the bed to keep the metal from getting gouged.

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The Sierra 2500HD is designed as a modern work truck, sturdy in its frame and holding many convenience features in the cabin.

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Denali trim makes the cabin more a comfortable site office than a workers' lunch bench.

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Instead of a blind-spot monitor system, GMC fits the Sierra 2500HD with these two-stage mirrors.

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Power adjustable front seats add comfort to the cab.

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The rear seats have less padding than the front, but plenty of legroom and easy access.

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In Denali tirm, the IntelliLink head unit comes standard.

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In four-wheel-drive mode, the front wheels bind up when turned all the way to steering lock, reducing power and maneuverability.

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A display on the instrument cluster shows vehicle, navigation and entertainment screens.

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With the optional four-wheel-drive system, you can choose between two-wheel-drive, four-wheel-drive high, and four-wheel-drive low at the turn of a dial.

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The standard Bose audio system includes six speakers and a subwoofer.

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IntelliLink is the standard infotainment head unit GM developed for its range of brands, which can also be found in Chevy cars.

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IntelliLink uses a smartphone-like icon-based interface, which responds quickly to inputs.

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The navigation systems shows detailed maps in perspective and plan views.

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Destination input uses this onscreen keyboard or voice command.

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There is a points-of-interest database onboard, but no online destination search.

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OnStar includes a 4G Wi-Fi hotspot.

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The navigation system automatically warns you about bad traffic on the road ahead.

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Weather data comes to the car courtesy of satellite radio.

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The Bluetooth hands-free phone system includes a dialer and contact list integration.

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HD radio comes standard with this head unit.

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With an iPhone plugged into the Sierra 2500HD's USB port, the head unit shows this music library interface.

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Other audio sources include Bluetooth streaming and satellite radio.

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