The GMC Sierra 1500 is available with four engine choices. Specifically, the Sierra 1500 offers a 2.7-liter turbocharged high-output four-cylinder, a 5.3-liter V-8, a 6.2-liter V-8, and a 3.0-liter Duramax turbo-diesel six-cylinder engine. With the Duramax in your next GMC Sierra 1500, you’ll get top-rated towing capacities and the highest MPGs of the new Sierra 1500 lineup. Whichever engine choice you prefer, the Sierra 1500 will get the job done.