GMC carried over the 2015 Acadia with no notable changes. This midsize SUV comes in SLE, SLT, and Denali trim levels, and the standard engine is a 3.6-liter V6 with 281 to 288 horsepower, depending on which version you choose. The EPA-estimated gas mileage for front-wheel-drive models is 17/24/19 mpg in city/highway/combined driving, with all-wheel-drive models returning 16/23/19 mpg. The 2015 GMC Acadia tows 5,200 pounds, seats up to eight people, and provides a maximum of 116.1 cubic-feet of cargo space. Rear parking sensors are standard, and safety features such as forward-collision warning and lane-departure warning are available.