Automatic Headlamp System
When the exterior lamp control is set to AUTO and it is dark enough outside, the headlamps come on automatically.
There is a light sensor located on top of the instrument panel. Do not cover the sensor; otherwise the headlamps will come on when they are not needed.
The system may also turn on the headlamps when driving through a parking garage or tunnel.
When it is bright enough outside, the headlamps will turn off or may change to Daytime Running Lamps (DRL).
The automatic headlamp system
turns off when the exterior lamp
control is turned to 
or the
ignition
is off.
See also:
Rear Window Lockout
Rear Window Lockout
This feature prevents the rear
passenger windows from operating,
except from the driver position.
Press o to activate the rear
window lockout switch. The LED (A)
comes ...
Sensor
The solar sensor, located on top of
the instrument panel near the
windshield, monitors the solar heat.
The climate control system uses the
sensor information to adjust the
temperature, fan sp ...
Using the Delete All Name Tags Command
The delete all name tags command deletes all stored
phone book name tags and route name tags for OnStar
(if present).
To use the delete all name tags command:
1. Press and hold for two seconds. ...