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The Sierra is a heavy duty ("HD" in its appellation signifies this) truck, which has actually existed in one or another form or name since the 1930s. It is the GMC counterpart of the same group's Silverado, which Chevrolet sells with the same specifications, albeit with fewer luxury features. Since this is the luxury version of its rugged cousin, the Sierra 2500 HD is something that delivers more in terms of utility, performance and sophistication. The 2010 GMC Sierra 2500 HD is presented in three body styles: regular cab, extended cab and crew cab. The Work Truck and SLE are available in regular, extended and crew cab styles while the SLT trim is available only in extended and crew cab styles. Mainly a carryover model from 2009, the 2010 Sierra 2500 HD features a new 360-horsepower 6.0L V8 standard engine and has USB connectivity in center console on up level radios, enabling stored audio files to play through the audio system and battery charging for some handheld devices.

The full-size 2010 GMC Sierra 2500 HD pickup truck is available in 2-3 passenger regular cab or 5-6 passenger extended cab, 5-6-passenger crew cab or 3/4-ton; 2- and 4-wheel-drive heavy duty rims. Its key competitors include Ford Super Duty Series and Dodge Ram heavy-duty pickup tricks. A host of interior and exterior features that make up the 2010 GMC Sierra 2500HD include fog lamps; daytime running lamps with automatic exterior lamp control; coat hooks; dual halogen composite headlamps; front intermittent, wet-arm wipers with pulse washers; chrome surround grille; driver information system with odometer, trip odometer and message center; instrumentation; front cup holders; dual cargo area lamps; tilt-wheel, adjustable steering column with brake/transmission interlock; interior lighting; tailgate protection; two 12-volt power outlets; full-size spare tire located at rear underbody of vehicle; XM Radio that includes three-trial months of service; and audio system with MP3 compatible CD player, seek-and-scan, digital clock, auto-tone control, radio data system, speed-compensated volume, and theftlock.

The 360-horsepower 6.0-liter Vortec V8 engine mated to a six-speed automatic transmission is standard on all GMC Sierra 2500 HD models, while the Duramax 6.6-liter turbo-diesel V8 engine that generates 360 horsepower and can be matched to an Allison six-speed automatic gearbox is optional. Both rear-wheel and four-wheel drive setups are available. The maximum towing capacity is rated at 15,800 pounds and the maximum payload capacity is 3,924 pounds.

The 2010 GMC Sierra 2500HD is equipped with sophisticated safety devices such as StabiliTrak, stability control system with pro-active roll avoidance; four-wheel anti-lock disc brakes; frontal driver and right-front passenger airbags; tire pressure monitoring system; and OnStar with one-year Safe and Sound Plan.