The Acadia is roomy, has a modern silhouette and a cabin that was updated two years ago. It's the equivalent at GMC of the Buick Enclave and Chevrolet Traverse. And, like these two, it’s powered by a 3.6-litre 288-horsepower V6 that helps it accelerate as fast as its peers and tow up to 1,999 pounds (907 kilos). The Denali is the most luxurious of the Acadia family.