Rear Compartment Lid Ajar Switch
WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
The rear compartment lid ajar switch is located in the rear compartment lid latch assembly and is a discrete input to the BCM. The BCM utilizes this input as a means to active the alarm if the rear compartment is opened while CTD is armed.
IMPORTANT:
The CTD system can be armed with the windows or sunroof open.