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:
Fuels in Foreign
Countries
Never use leaded gasoline or any
other fuel not recommended in the
previous text on fuel. Costly repairs
caused by use of improper fuel
would not be covered by the vehicle
warranty.
To chec ...
Change Compass Zone
The vehicle may have this feature.
To change the compass zone
through the DIC, see Compass. ...
Touch-Sensitive Screen Buttons
Touch-sensitive screen buttons are located on the screen. When a screen button
has been selected, a beep sounds. Screen buttons are highlighted when a feature
is available. ...