More power is had by selecting an RST, Z71 or a High Country trim level since these models are equipped with a 6.2-liter, V8 engine that generates 420 horsepower and 460 pound-feet of torque. The upgrade allows the vehicle to achieve 60 miles per hour in 5.9 seconds. Either engine has an estimated EPA rating of up to 14 mpg city and 20 mpg highway.
Consumers preferring a diesel setup may opt for the Duramx turbocharged three-liter diesel V6 that puts out 305 horsepower and 495 pound-feet of torque. Along with having the ability to pull up to 8,200 pounds, this SUVs have EPA ratings of up to 21/28 miles per gallon.