2010 GMC Canyon Extended Cab Owner's Manual - Page 118

Tailgate { WARNING: It is extremely dangerous to ride on the tailgate, even when the vehicle is operated at low speeds. People riding on the tailgate can easily lose their balance and fall in response to vehicle maneuvers. Falling from a moving vehicle may result in serious injuries or death. Do not allow people to ride on the tailgate. Be sure everyone in your vehicle is in a seat and using a safety belt properly. Open the tailgate by pulling up on the outside handle while pulling the tailgate down. When the tailgate is shut, be sure it is latched securely. On vehicles with a locking tailgate, use the ignition key. Turn the key counterclockwise to lock the tailgate. Turn the key clockwise to unlock the tailgate. 3-8