Circuit/System Description
WARNING: This page is about a different car, the 2016 Buick LaCrosse. However, it is still accessible from the selected car via links, so may be relevant.
The parking assist can be enabled/disabled by pressing the parking assist switch. If the parking assist is enabled, engaging the reverse gear activates the park assist feature. By subsequently pressing the parking assist switch the parking assist can be disabled again. The indicator in the parking assist switch shows the status of the parking assist. If the lamp is ON, parking assist is enabled.
The parking assist feature is enabled by the parking assist switch pulling the signal circuit from the front and rear parking assist control module to ground. The LED is illuminated by the front and rear parking assist control module providing the ground to the LED.