See also:

Outside Automatic Dimming Mirror
If the vehicle has this feature, the driver side mirror adjusts for the glare of headlamps behind you. This feature is controlled by the on and off settings on the automatic dimming rearview mir ...

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 ...

Braking
See Brake System Warning Light. Braking action involves perception time and reaction time. Deciding to push the brake pedal is perception time. Actually doing it is reaction time. Average reacti ...