Buckle to Drive functions only when the Traverse, Malibu or Colorado is in Teen Driver mode. If the vehicle is running and the driver’s seatbelt is not buckled, it will not allow the driver to shift out of Park for up to 20 seconds. As soon as the brake pedal is pressed, the driver will hear an audible alert and see a message in the driver information center that reads: “Buckle seatbelt to shift.”