Diagnostic Aids

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.

If the rear compartment lid position sensor is missing, the folding top control module shall have the default failure mode: Activate secondary lamps additional to primary lamps if "Latch Open" is indicated.
Check for proper installation of rear compartment lid position sensor. It is important that it's position is as intended.