See also:

Touch Screen Buttons
Touch screen buttons are on the screen and highlighted when a feature is available. Some screen buttons highlight when active and gray out when inactive. ...

Vehicle and Power Issues
OnStar services require a vehicle electrical system, wireless service, and GPS satellite technologies to be available and operating for features to function properly. These systems may not o ...

Check Gas Cap Light
If your vehicle has this light, it will come on if your gas cap is not securely fastened. ...