2005 Buick LaCrosse Owner's Manual - Page 84

Automatic Door Locks The vehicle's doors are programmed from the factory to lock when the shift lever is moved into a forward gear, and to unlock when the shift lever is moved into PARK (P). If someone needs to get in or out of the vehicle after the doors have been locked, place the shift lever into PARK (P). You may also unlock all doors using the power door lock switch or unlock one door using the inside manual door lock. If your vehicle has a Driver Information Center (DIC), there are different programming options for locking and unlocking the doors automatically. See DIC Vehicle Personalization on page 3-71. Lockout Protection 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 pin is used, the key could still be locked inside the vehicle. Always remember to take the key with you. 2-12