Avalanche's unique design enables it to function as an SUV, truck or both, thanks to the exclusive Midgate. It opens to extend the cargo-carrying capability from the cargo bed's 5-foot-3-inch-long (1.6 m) length to 8 feet 2 inches (2.5 m). The rear seat must be folded to achieve maximum storage capability; with the rear seat up and the Midgate closed, Avalanche has room for up to six passengers. Additional features include radio USB port, Bluetooth wireless phone connectivity, a rear camera system and side blind zone detection and head curtain side air bags as standard and available technologies.