Circuit/System Description
WARNING: This page is about a different car, the 2022 Cadillac CT5. However, it is still accessible from the selected car via links, so may be relevant.
The K9 Body Control Module provides the control circuit 2683 and control circuit 2690 with voltage and ground to the appropriate lock and unlock control circuits of the fuel filler door lock actuator. The lock control circuits of the fuel filler door lock actuator and left rear are connected together. Transitioning of the lock actuators to the lock or unlocked position depends upon which control circuits receive voltage and which control circuits receive ground.