OnStar Services
See also:
Tire Inspection
We recommend that the tires, including the spare tire, if the vehicle has one,
be inspected for signs of wear or damage at least once a month.
Replace the tire if:
The indicators at three or mo ...
Lamps On Reminder
For vehicles with the lamps on reminder light, it comes on when the lights
are in use. ...
Fuel Additives
To provide cleaner air, all gasolines in the United States are now required to
contain additives that help prevent engine and fuel system deposits from forming,
allowing the emission control syste ...






