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:
Selecting the Right Engine Oil
Selecting the right engine oil depends on both the proper oil specification and
viscosity grade. See Recommended Fluids and Lubricants .
Specification
Use and ask for licensed engine oils with the ...
Deleting Name Tags
The system uses the following commands to delete name tags:
► Delete
► Delete all name tags ...
Compass Messages
CAL
This message is displayed when the
compass needs to be calibrated.
See Compass.
– – –
Three dashes will be displayed if the
compass needs service. See your
dealer for service. ...
