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:
Languages
The vehicle can be programmed
to respond in French or Spanish.
Push and ask an Advisor.
Advisors can speak French or
Spanish. ...
Special Application Services
Severe Commercial Use Vehicles Only: Lubricate chassis components every
5 000 km/ 3,000 mi.
Have underbody flushing service performed once a year.
...
Adding Destinations to the Address Book
There are two ways to add a destination to the address book:
To add the current vehicle position to the address book, press the Mark
screen button from the map screen. The system automatically ...