2015 GMC Sierra 2500 HD Crew Cab Denali Professional Grade Strength with Luxury RefinementThe 2015 GMC Sierra 2500 HD Denali is the definitive heavy-duty pickup for those who require maximum towing capability without sacrificing the comforts of a high-end luxury vehicle. Positioned at the pinnacle of the GMC lineup, the Denali trim transforms this rugged workhorse into a sophisticated command center, making it as suitable for a construction site as it is for a premium valet stand.Under the hood, this heavy-duty beast is powered by the legendary 6.0-liter V8 engine, delivering 360 horsepower and 380 lb-ft of torque. Paired with a heavy-duty 6-speed automatic transmission, this powertrain is engineered for sustained performance under load. For those tackling the toughest tasks, the Sierra 2500 HD offers a maximum towing capacity of up to 14,500 lbs, ensuring that large trailers, boats, or equipment are handled with absolute confidence.The driving experience is surprisingly composed for a 3/4-ton truck. Thanks to the Denali-specific suspension tuning and a fully boxed high-strength steel frame, the ride is smooth and vibration-free. The Digital Steering Assist system provides a light feel at low speeds for easier parking maneuvers while firming up at highway speeds to provide a stable, centered feel even when hauling a heavy payload in the 6 1/2-foot bed.On the exterior, the Denali trim is unmistakable. It features the iconic chrome honeycomb grille, body-colored bumpers, and 20-inch polished aluminum wheels. The 6 1/2-foot bed is highly functional, equipped with the CornerStep rear bumper and EZ-Lift & Lower tailgate, making access to the cargo area effortless. The Crew Cab configuration provides a massive footprint, exuding a sense of authority and Professional Grade durability.Inside, the cabin is a sanctuary of premium materials and advanced technology, offering:Perforated leather-appointed heated and ventilated front bucket seatsDistinctive Denali brushed aluminum trim and authentic wood accents8-inch Color Touch Radio with IntelliLink and NavigationBose® Premium Audio System for a concert-like sound experiencep style=caret-color:000;color:000;font-style:normal;font-variant-caps: