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. ...

Remote Keyless Entry (RKE) System
The RKE transmitter will work up to 20m (65 ft) away from the vehicle. Press the key release button to extend the key blade. The key can be used for the ignition and all locks. Press to unlock th ...

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 light turn ...