Innovation, control, and capability are engineered into every Sierra HD GMC builds. Take, for instance, the available Duramax Diesel engine. With 397 horsepower and 765 lb-ft of torque, it’s incredibly powerful. An Allison automatic offers the driver enhanced control, as does an advanced diesel exhaust brake, which leverages engine torque to slow the Sierra HD on hills.
For more information about the GMC Sierra HD, visit: http://www.gmc.com/sierra-2500-denali-hd-pickup-truck.html