The GMC Acadia carved out a niche as a three-row family hauler that drove more like a tall wagon than a truck-based SUV. For buyers who wanted room for the whole crew without stepping up to a full-size Yukon, the Acadia hit a nice middle ground, offering car-like manners with genuine seating capacity. Powering this one is GM's 3.6L V6, a gasoline engine that was the workhorse across a huge swath of the GM lineup during this era. It's a naturally aspirated six that delivers reasonable pull for a...