Operation CHARM: Car repair manuals for everyone.
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Remote Alarm

Vehicles equipped with the content theft deterrent system (RPO UA6) have a remote alarm feature. When you press the ALARM button on the keyless entry transmitter, the RCDLR sends a message to the BCM through circuit 1455. This message performs the following 2 functions alternately for 2 minutes:
^ Flash the exterior lamps
^ Sound the horn

In order to stop the alarm, press the ALARM button again.

For a description of the RPO Code(s) shown in this article, refer to the RPO Code List found at Vehicle/Application and ID. Application and ID