Circuit/System Description
WARNING: This page is about a different car, the 2013 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
When the ignition is turned ON, the advanced rear parking assist control module and the vehicle direction camera control module receives the vehicle identification number (VIN) from the body control module. The advanced control module will compare the VIN received to the VIN stored in memory.