* 6.0L Vortec V8: This engine produced 360 horsepower and 380 lb-ft of torque.
* 6.6L Duramax V8 Turbo-Diesel: This engine produced 397 horsepower and 765 lb-ft of torque.
It's important to note that the exact engine in your specific 2013 GMC Sierra 2500HD will depend on its trim level and configuration. You can find out the exact engine in your truck by checking your vehicle's identification number (VIN) or looking in the owner's manual.
