2015 Buick Enclave Owner Manual - Page 37

2-8 Keys, Doors, and Windows Doors Liftgate . Warning (Continued) Adjust the climate control system to a setting that brings in only outside air and set the fan speed to the highest setting. See "Climate Control Systems" in the Index. If the vehicle is equipped with a power liftgate, disable the power liftgate function. { Warning Exhaust gases can enter the vehicle if it is driven with the liftgate or trunk/hatch open, or with any objects that pass through the seal between the body and the trunk/hatch or liftgate. Engine exhaust contains carbon monoxide (CO) which cannot be seen or smelled. It can cause unconsciousness and even death. If the vehicle must be driven with the liftgate or trunk/hatch open: ... Open the rear doors to access the security locks on the inside edge of each door. To set the locks, insert a key into the slot and turn it to the horizontal position. The door can only be opened from the outside with the door unlocked. To return the door to normal operation, turn the slot to the vertical position. See Engine Exhaust on page 9-21. { Caution To avoid damage to the liftgate or liftgate glass, make sure the area above and behind the liftgate is clear before opening it. Close all of the windows. Fully open the air outlets on or under the instrument panel. (Continued)