The GMC Acadia is a mid-size crossover SUV (full-size until 2016) from GMC. The GMC Acadia, Chevrolet Traverse, and Buick Enclave share the new GM Lambda platform. The Acadia went on sale in 2006 as a 2007 model in the United States and in Canada. The Acadia replaces three of the 7- or 8-seater vehicles on the Pontiac-Buick-GMC dealership network, the mid-size GMC Safari van, the GMC Envoy, and the Pontiac Montana SV6 minivan for the domestic market. As of 2009, the Lambda vehicles have replaced the Buick Rainier, Buick Rendezvous, and the Buick Terraza, and then subsequently the GMC Envoy and the Chevrolet TrailBlazer. A Denali version of the Acadia debuted in 2010 as a 2011 model. In 2016, the second generation Acadia was repositioned as a mid-size crossover utility vehicle (as a 2017 mo