2001 GMC Sierra 1500 Pickup Owner's Manual - Page 99

Content Theft-Deterrent (If Equipped) Your vehicle may be equipped with a Content Theft-Deterrent alarm system. With this system, the SECURITY message will flash as you open the door (if your ignition is off). If a door is opened without the key or the remote keyless entry transmitter, the alarm will go off. Your vehicle's headlamps will flash and the horn will sound for about two minutes, then will turn off to save the battery power. Remember, the theft-deterrent system won't activate if you lock the doors with a key or use the manual door lock. It activates only if you use a power door lock switch with the door open, or with the remote keyless entry transmitter. You should also remember that you can start your vehicle with the correct ignition key if the alarm has been set off. Here's how to avoid setting off the alarm by accident: This message reminds you to activate the theft-deterrent system. Here's how to do it: 1. Open the door. 2. Lock the door with the power door lock switch or the remote keyless entry transmitter. The SECURITY message should come on and stay on. If using the remote keyless entry transmitter, the door does not need to be open. 3. Close all doors. The SECURITY message should go off after approximately 15 seconds. The alarm is not armed until the SECURITY message goes off. D If you don't want to activate the theft-deterrent system, the vehicle should be locked with the door key after the doors are closed. keyless entry transmitter. Unlocking a door any other way will set off the alarm if the system has been armed. D Always unlock a door with a key, or use the remote If you set off the alarm by accident, unlock any door with the key. You can also turn off the alarm by pressing UNLOCK on the remote keyless entry transmitter or by placing the key in the ignition and turning it to START. 2-16