2003 Buick Rendezvous Owner's Manual - Page 104

Lockout Protection The lockout protection feature makes it difficult for you to lock your keys in your vehicle. If any door is open while the key is in the ignition, pressing the front of a power door lock switch will lock all doors, then unlock the driver's door. If you leave the key in your vehicle but not in the ignition or if you use the manual door lock, you could still lock the key in the vehicle. Always remember to take the key with you. Liftgate E l - Leaving Your Vehicle If you are leaving the vehicle, take your key, open your door and set the locks from the inside. Then get out and close the door. It can be dangerous to drive with the liftgate open because carbon monoxide (CO) gas can come into your vehicle. You can't see or smell CO. It can cause unconsciousness and even death. If you must drive with the liftgate open or if electrical wiring or other cable connections must pass through the seal between the body and the liftgate: 0 Make sure aii other windows are shut. * Turn the fan on your heating or cooling system to its highest speed and select the control setting that will force outside air into your vehicle. See "Comfort Controls" in the Index. !f you have air outlets on or under the instrument panel, open them all the way. See "Engine Exhaust" in the Index. 2-11