The 2017 GMC Acadia is a midsize SUV with seating for five, six or seven passengers and is offered in SL, SLE, SLT and Denali trim levels. The seven-passenger base SL trim is only available with a middle bench seat and comes with a 2.5-liter four-cylinder engine (193 horsepower, 188 pound-feet of torque), a six-speed automatic transmission, front-wheel drive, 17-inch alloy wheels, heated mirrors, keyless ignition and entry, cruise control, a driver information display, tri-zone automatic climate control, a four-way manually adjustable driver seat (two-way-adjustable front passenger seat), a leather-wrapped tilt-and-telescoping steering wheel, Bluetooth connectivity, a 7-inch touchscreen, Apple CarPlay and Android Auto smartphone app integration, a rearview camera, OnStar and a six-speaker stereo with a USB-auxiliary audio input. The SLE1 trim adds only LED running lights and satellite radio, but the SLE2 steps it up with 18-inch wheels, foglights, a power liftgate with programmable height stops, roof rails, remote ignition, an eight-way power-adjustable driver seat and heated front seats. The SLE2 and above trims come standard with middle-row captain's chairs that reduce passenger capacity to six, but the second-row bench is available. Opting for the SLT1 trim adds an auto-dimming driver-side and rearview mirror, an upgraded color driver information display, a 120-volt power outlet, a universal garage door opener, leather upholstery, power-adjustable front seats with lumbar adjustments, and an eight-speaker Bose audio system with a subwoofer. Also included is the Driver Alert I package that comes with blind-spot monitoring, rear cross-traffic alert and rear parking sensors.