2010 Cadillac CTS Owner's Manual - Page 29

Keys, Doors and Windows 1-23 Vehicle Security Vehicle theft is big business, especially in some cities. This vehicle has theft-deterrent features, however, they do not make it impossible to steal. Arming the System To arm the system, 1. Open the door. 2. Lock the door with the transmitter. The security light should come on and stay on. 3. Close all doors. The security light should go off after about 30 seconds. The alarm is not armed until the security light goes off. If a locked door or trunk is opened without using the key in the driver's door key cylinder or the transmitter, a ten second pre-alarm will occur. The horn will chirp and the lights will flash. If the key is not placed in the ignition and turned to START or the door is not unlocked by pressing the unlock button on the transmitter during the ten second pre-alarm, the alarm will go off. Your vehicle's headlamps will flash and the horn will sound for about 30 seconds, then will turn off to save the battery power. Anti-Theft Alarm System This vehicle has an anti-theft alarm system. The theft-deterrent system will not activate if the doors are locked with the vehicle's key or the manual door lock. It activates only if the power door lock switch is used while the door is open or with the transmitter. You should also remember that you can start your vehicle with the correct ignition key if the alarm has been set off. To avoid setting off the alarm by accident: . Lock the vehicle with the door key after the doors are closed. Always unlock a door with the transmitter. Unlocking a door any other way will set off the alarm. . The security light, located in the instrument panel cluster, comes on when the system is arming. If you set off the alarm by accident, turn off the alarm by pressing the unlock button on the transmitter. The alarm will not stop if you try to unlock a door any other way.