The 2011 GMC Sierra 2500HD, part of the third generation of Sierra heavy-duty trucks, is notable for its power, durability, and superior towing capabilities. It offers two engine options: a standard 6.0L V8 producing 360 hp and a more powerful 6.6L Duramax turbodiesel V8 delivering a robust 397 hp and a massive 765 lb-ft of torque. Both engines come with a robust six-speed automatic transmission. The Sierra 2500HD provides rear-wheel drive as standard, with four-wheel drive as an option. Available in three trims - Work Truck, SLE and SLT, this model touts an upscale cabin for a heavy-duty truck, with SLT offering features like leather upholstery, automatic climate control, and a Bose audio system. Notable safety features include four-wheel ABS, stability control, front-impact airbags, and a security system that detects unwanted vehicle intrusion.