GM Service Manual Online
For 1990-2009 cars only

This feature prevents the driver door from being locked using the power door locks, if the key is left in the ignition and a door is open.

Press the power door lock switch to lock all the doors and then unlock the driver door.

Press and hold the power door lock switch for more than three seconds to override this feature.

If the key is removed from the ignition, or if the manual door lock or the Remote Keyless Entry (RKE) transmitter is used, the key could still be locked inside the vehicle. Always remember to take the key with you.

The lockout protection feature makes it more difficult to lock the key in the vehicle. If the driver's door is open while the key is in the ignition, the door cannot be locked with the power door lock switch.

This feature cannot guarantee that you will never be locked out of the vehicle. If the key is not left in the ignition, or, if the manual door lock is used, the key could still be locked inside the vehicle. Always remember to take the key with you.