GMC unveiled the new 2013 Acadia and Acadia Denali at the 2012 Chicago Auto Show, highlighting a new exterior and safety features including the industry's first front center air bag. The GMC Acadia retains the interior functionality popular with families, including the SmartSlide seating system, which allows easy access to the third row for both seven- and eight-passenger seating configurations. Likewise, both the second and third row still fold flat for class-leading maximum cargo space, including the ability to carry 48-inch-wide sheet goods, such as drywall and plywood. A chiseled, three-bar grille sits prominently in the new, more upright design while diffused LED running lamps lend a premium look to the GMC Acadia and are standard on all models, regardless of whether standard projector beam or optional HID headlamps are selected. The new GMC Acadia gets other subtle exterior design updates, including wrap-around rear glass and a new rear spoiler. New 18-, 19- and 20-inch wheel patterns complement the vehicle's lines and stance.