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:
Map Data Updates
The navigation map database is stored on a compact flash card. It is usable only
in this type of navigation system, and will not function in other electronic devices.
The map in the vehicle was ins ...
Maintenance Schedule
Owner Checks and Services
At Each Fuel Stop
- Check the engine oil level.
See Engine Oil.
Once a Month
- Check the tire inflation pressures. See Tire Pressure.
- Inspect the tires fo ...
Center Instrument Panel Fuse Block
The center instrument panel fuse block is located underneath the instrument panel,
to the left of the steering column. ...