2003 Cadillac Seville Owner's Manual - Page 79

Theft-Deterrent Systems Vehicle theft is a big business, especially in some cities. Although your vehicle has a number of theft-deterrent features, we know that nothing we put on it can make it impossible to steal. The SECURITY light is located on the instrument panel cluster. If a door or a trunk is opened without a key or a remote keyless entry transmitter, the horn will sound and the lamps will flash for about 30 seconds. Remember, the theft-deterrent system won't arm if you lock the doors with a key or use the manual door lock. It activates only if you use a power door lock with the door open or the remote keyless entry transmitter. To avoid activating the alarm by accident do the following: 0 SECURITY The vehicle should be locked with the door key or the manual door lock after the doors are closed if you don't want to arm the theft-deterrent system. Always unlock a door with a key or use the remote keyless entry transmitter. Pressing the unlock button on the remote keyless entry transmitter disables the theft-deterrent system. Unlocking a door any other way will activate the alarm when a door or the trunk is opened. If the ignition is off and any door is open, the SECURITY light will flash, reminding you to arm the system. To arm the system, do the following: 1. Open the door. 2. Lock the door using the power door lock switch with the door open or the remote keyless entry transmitter. The SECURITY light should come on and stay on. 3. Close all the doors. The SECURITY light should go off within approximately 30 seconds. If you activate the alarm by accident, unlock the driver's door with your key. You can also turn off the alarm by using the unlock button on the remote keyless entry transmitter, or by starting the car with a valid key. Changes or modifications made to this system by other than an authorized service facility could void authorization to use the theft system. 2-18