The new GMC Acadia is available with a powerful V-6 engine to get you up to speed smoothly. Specifically, a new GMC Acadia for sale comes standard with a 2.0-liter turbocharged four-cylinder engine making 228 horsepower and 258 pound-feet of torque and can be upgraded with a 3.6-liter V-6 engine making 310 horsepower and 271 pound-feet of torque.