The new Acadia is shorter and 500 pounds lighter than the old model. The ride is steady and composed, and handling is responsive. The most appropriate engine is the smooth 3.6-liter V6 that returned 19 mpg in our tests, which isn't a standout. A less powerful but still sound 2.5-liter four-cylinder is standard. This family-friendly three-row SUV is very quiet, the front seats are comfortable, and the infotainment system is easy to use. The outboard second-row seats can slide and tilt forward, even with a child seat in place. But many luxury features, such as four-way adjustable lumbar, a power sunroof shade, and auto-up windows, are missing even on our high-end Denali version. Available safety features include forward-collision warning with automatic braking, pedestrian detection, and blind-spot monitoring.