The 2011 Chevrolet Silverado HD features an upgraded Duramax 6.6L turbo-diesel V8 engine, producing 397 horsepower and 765 lb-ft of torque, making it the most powerful heavy-duty pickup available. It boasts a fully boxed high-strength steel frame capable of handling up to 6,635 lbs of payload and a towing capacity of 21,700 lbs, along with advanced safety features such as trailer sway control and an integrated trailer brake controller. The Silverado HD is backed by a 100,000 mile/5-year powertrain warranty, emphasizing its reliability and durability in the heavy-duty truck market.