CTS V8-5.7L VIN P (2004)
4. After 30 seconds, the RIM enters the armed mode. In armed mode the RIM commands the instrument cluster to turn off the SECURITY indicator
via the class 2 serial data line. Any forced entry activates the alarm mode.
5. When the RIM detects a forced entry, the RIM enters the alarm mode. The RIM commands the DIM to activate the horn and exterior lamps for 30
seconds, via a class 2 message. This is followed by a three minute time-out with the horn no longer active. If no new intrusions are detected after
the time-out, the horn is not active. The system must be disarmed or the intrusion condition removed after the time-out for the system to exit alarm
mode.