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 
, and
an Advisor can run a check.
See also:
Heated Steering Wheel
The vehicle may be equipped with a
heated steering wheel.
(Heated Steering Wheel): Press
to turn the heated steering wheel on
or off. A light on the button displays
when the feature is tur ...
Compass
The vehicle may have a compass display on the Driver Information Center
(DIC). The compass receives its heading and other information from the Global
Positioning System (GPS) antenna, StabiliTrak, a ...
Limited Guidance Areas
Any area that is not classified as detailed, is a limited guidance area. Limited
guidance streets are displayed on the map but route guidance may not be given on
these streets. Some POI categories ...