See also:

OnStar®
If the vehicle has OnStar and you subscribe to the OnStar services, please refer to the OnStar Terms and Conditions for information on data collection and use. ...

Removing the Flat Tire and Installing the Spare Tire
This vehicle may have aluminum wheels with exposed wheel nuts. Use the wheel wrench to loosen all the wheel nuts. Do not remove them yet. Or, this vehicle may have steel wheels with plastic covers. ...

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