OnStar Services

See also:

Engine Compartment Fuse Block (CTS Wagon)
This fuse block is on the left side of the engine compartment. Lift the fuse block cover to access the fuses. The vehicle may not be equipped with all of the fuses and relays shown. Notic ...

Security Light
The immobilizer light should come on briefly as the engine is started. If it does not come on, have the vehicle serviced by your dealer. If the system is working normally, the indicator ligh ...

Door Ajar Messages
DRIVER DOOR OPEN This message displays and a chime sounds if the driver door is not fully closed and the vehicle is shifted out of P (Park). Stop and turn off the vehicle, check the door for obst ...