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:
Security
OnStar provides services like Stolen Vehicle Assistance, Remote Ignition Block,
and Roadside Assistance, if the vehicle is equipped with these services. OnStar
can unlock the vehicle doors remotel ...
Electronically Controlled AirSuspension System
Your vehicle is equipped with an electronically
controlled air suspension system that automatically
keeps your vehicle level as you load and unload.
The system includes a compressor, two height
...
Buying New Tires
GM has developed and matched specific tires for
your vehicle. The original equipment tires
installed on your vehicle, when it was new, were
designed to meet General Motors Tire
Performance Criteri ...
