Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems.
It also checks the tire pressures, if the vehicle is equipped with the Tire Pressure Monitoring System.
If a diagnostics check is needed between e-mails, push 
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Advisor can run a check.
See also:
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 ...
Delayed Locking
With this feature, you can delay the
actual locking of the doors.
When the power door lock switch is
pressed when the key is not in the
ignition and the driver door is
opened, a chime will so ...
Windows
WARNING
Leaving children, helpless adults, or pets in a vehicle with the windows closed
is dangerous. They can be overcome by the extreme heat and suffer permanent
injuries or even death from heat ...