See also:

Reporting Safety Defects to the United States Government
If you believe that your vehicle has a defect which could cause a crash or could cause injury or death, you should immediately inform the National Highway Traffic Safety Administration (NHTSA) ...

Auto Defog
This will allow you to turn the auto defog on or off. Only vehicles with the dual zone climate control will have this option. Press SELECT when Auto Defog is highlighted to open the menu. Tur ...

Your Responsibility
Increase the volume of the radio if the OnStar Advisor cannot be heard. If the light next to the OnStar buttons is red, the system may not be functioning properly. Push and request a vehicle diagnos ...