See also:

Parade Dimming
This feature automatically prohibits the dimming of the instrument panel displays in daylight while the headlamps are on so that the displays are still able to be seen. ...

Remote Vehicle Start
Your vehicle may have a remote starting feature. This feature allows you to start the engine from outside the vehicle. It may also start the vehicle’s heating or air conditioning systems, rear ...

Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if ...