OnStar

See also:

Highbeam On Light
This light comes on when the high-beam headlamps are in use. ...

When the System Does Not Seem To Work Properly
Occasional missed alerts can occur under normal circumstances and will increase in wet conditions. The system does not need to be serviced due to an occasional missed alert. The number of missed ...

Lamps On Reminder
For vehicles with the lamps on reminder light, it comes on when the lights are in use. ...