Circuit/System Description
WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
The content theft deterrent system uses the power sounder to provide an audible alert when in the alarm mode. The power sounder receives a constant B+ and ground. The body control module commands the power sounder via serial data. The power sounder is also equipped with a battery backup. If the power sounder is disconnected while the ignition is OFF, the battery backup will allow the power sounder to sound the audible content theft deterrent alert.