2005 Cadillac DeVille Owner's Manual - Page 71

There are several ways to lock and unlock your vehicle. Because your vehicle has the theft-deterrent system, you must unlock the doors with the key or remote keyless entry transmitter to avoid setting off the alarm. From the outside, use either the key or the remote keyless entry transmitter. From the inside, use the manual lock levers located at the top of the door panel near the window. Central Door Unlocking System Your vehicle has a central door unlocking mode and a theft-deterrent system. When unlocking the driver's door, you can unlock the other doors by holding the key in the turned position for a few seconds or by quickly turning the door key twice in the lock cylinder. Power Door Locks The power door lock switches are located on the door panels near the windows. Push down the manual lock lever to lock the door. To unlock the door, pull up on the lever. 2-9