See also:

Rear Compartment Fuse Block (CTS Wagon)
This fuse block is on the right side of the vehicle, behind the trim panel in the rear compartment. The vehicle may not be equipped with all of the fuses, relays, and features shown. ...

If the System Needs Service
If the navigation system needs service and the steps listed here have been followed but there are still problems, see your dealer for assistance. ...

Keyless Unlock
If the vehicle has the keyless access system, this feature allows you to select which doors will automatically unlock when you approach the vehicle with the keyless access transmitter and ...