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.
See also:
How OnStar Service Works
Automatic Crash Response,
Emergency Services, Crisis Assist,
Stolen Vehicle Assistance, Vehicle
Diagnostics, Remote Door Unlock,
Roadside Assistance, Turn-by-Turn
Navigation, and Hands-Free ...
Instrument Panel Illumination Control
The instrument panel brightness
knob is located on the instrument
panel next to the steering column.
(Instrument Panel
Brightness): Turn the knob
clockwise or counterclockwise to
brighten ...
Active Head Restraints
The vehicle has an active head
restraint system in the front seating
positions. These automatically tilt
forward to reduce the risk of neck
injury if the vehicle is hit from
behind. ...