2003 Chevrolet Monte Carlo Owner's Manual - Page 75

Mode 4: Automatic all-door lock when the transaxle is shifted out of PARK (P); automatic all-door unlock when the transaxle is shifted into PARK (P). Before your vehicle was shipped from the factory, it was programmed to Mode 4. The mode to which the vehicle was programmed may have been changed since it left the factory. To determine the mode to which your vehicle is programmed or to program your vehicle to a different mode, see Vehicle Personalization on page 2-43. Disconnecting the vehicle's battery for up to a year will not change any previously programmed modes. Lockout Protection To protect you from locking your key in the vehicle, this feature stops the power door locks from locking when the key is in the ignition and a door is open. If a power lock switch is pressed when a door is open and the key is in the ignition, both doors will lock and then the driver's door will unlock. A chime will sound continuously until both doors are closed. Leaving Your Vehicle If you are leaving the vehicle, take your keys, open your door and set the locks from inside. Then get out and close the door. 2-10