OnStar Services

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 wit ...

Using the System
When the driver shifts the vehicle into R (Reverse), the video image automatically appears on the navigation screen, or on the inside rearview mirror. Once the driver shifts out of R (Revers ...

SERVICE KEYLESS START SYSTEM
If the vehicle has the keyless access system, this message displays when there is a problem with this feature. See your dealer. ...