The GMC Acadia comes with a choice of two different engines, a fuel efficient 2.5L 4-cylinder making 193 horsepower or a more powerful 3.6L V6 with 310 horsepower. Engines send power to either the front wheels, or to all four wheels via a 6-speed automatic transmission. Even the all-wheel drive V6-engined version manages 25 mpg on the highway, while 4-cylinder versions do remarkably well, with a 21 mpg city rating for both front and all-wheel drive versions. The GMC Acadia comes in a variety of different trim levels, starting with the entry-level SL, then SLE, SLT and top-of-the-line Denali. The SL model still has plenty of features, despite its under-$30,000 base price. Key amenities include keyless open and start, tri-zone climate control, a 7-inch touch radio with IntelliLink, Apple CarPlay and Android Auto, a rear view camera, ambient interior lighting and 4G WiFi technology, meaning that buyers can turn their Acadia into a mobile wi-fi hotspot. The base Acadia also comes with 17-inch aluminum wheels, projector beam headlights and heated mirrors. Key features that the SLE adds include LED daytime running lamps, nicer floor mats and SiriusXM satellite radio. A programmable power liftgate, heated front seats, 8-way power adjustable driver's seat, a remote starter and 18-inch aluminum wheels are optional. SLT models add perforated leather seats, auto-dimming mirrors both inside and outside, a Bose sound system, a blind-spot detection system, a rear cross traffic alert system, a parking assist system and a larger touchscreen in the dashboard. The bigger 3.6L engine, 20-inch wheels, heated second row seats, a memory function for the driver's seat and safety systems such as a forward collision alert system and a lane keep assist system are available. Top of the line Denali models stand out with their unique signature Denali grill and 20-inch polished aluminum wheels. Front seats come heated and ventilated on the Denali, while the steering wheel also gets a heating function-- essential for those really cold days. The Denali versions also get a power tilt and telescoping steering wheel, nicer floor mats and upgraded interior trim.