See also:

Cellular and GPS Antennas
Avoid placing items over or near the antenna to prevent blocking cellular and GPS signal reception. Cellular reception is required for OnStar to send remote signals to the vehicle. ...

SERVICE STABILITRAK
This message displays if there has been a problem detected with the StabiliTrak® system. The TCS/StabiliTrak warning light on the instrument panel cluster also comes on. If this message come ...

Immobilizer Operation (Key Access)
This vehicle has a passive theft-deterrent system. The system does not have to be manually armed or disarmed. The vehicle is automatically immobilized when the key is removed from the igniti ...