OnStar Services

See also:

Sun Visors
Sun Visors with Slide Your vehicle may have this feature. Pull the sun visor down to block glare. Detach the sun visor from the center mount and slide it along the rod from side-to-side to cover t ...

Manual Operation
(Fan Control): Press the lower button to decrease the fan speed. Pressing the lower button longer turns the fan and cooling off. Press the upper button to increase the fan speed. The selected ...

Automatic Dimming Rearview Mirror
The vehicle may have an automatic dimming inside rearview mirror with OnStar® and/or a compass display. Automatic dimming reduces the glare from the headlamps of the vehicle behind you. The dim ...