See also:

Feature Settings Menu Items
The following are customization features that allow you to program settings to the vehicle: DISPLAY IN ENGLISH This feature will only display if a language other than English has been set. This ...

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 v ...

Brake Pedal Travel
See your dealer if the brake pedal does not return to normal height, or if there is a rapid increase in pedal travel. This could be a sign that brake service might be required. ...