TTY Users
OnStar has the ability to communicate to the deaf, hard-of-hearing, or speech-impaired customers while in the vehicle. The available dealer-installed TTY system can provide in-vehicle access to all of the OnStar services, except Virtual Advisor and OnStar Turn-by-Turn Navigation.
See also:
Storing and Deleting Phone Numbers
The system can store up to 30 phone numbers as name tags in the Hands-Free Directory
that is shared between the Bluetooth and OnStar systems.
The following commands are used to delete and store pho ...
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 ...
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. ...