The 2009 GMC Acadia was one of GM's early crossover success stories, offering three rows of seating in a package that drove more like a car than the body-on-frame SUVs it helped replace. In SLT trim with all-wheel drive, this one sits toward the upper end of the Acadia lineup, blending family-hauler practicality with a bit of extra comfort. Power comes from GM's 3.6L V6, a naturally aspirated gasoline engine that was widely used across the corporate lineup during this era. It's a smooth six-c...