Automatic Dimming Rearview Mirror

The vehicle may have an automatic dimming inside rearview mirror. Automatic dimming reduces the glare from the headlamps of the vehicle behind you. The dimming feature comes on and the indicator light comes on each time the vehicle is started.

on or off. : Press to turn automatic dimming on or off.

Vehicles with OnStar® have three additional control buttons located at the bottom of the mirror. See your dealer for more information on the system and how to subscribe to OnStar. See OnStar Overview on page 14‑1.

See also:

Muting a Call
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Performance
One reason the Acadia gets better gas mileage than traditional SUVs is its V-6 engine. Many full-size SUVs are offered with thirsty V-8s, but the Acadia only comes with a 3.6-liter V-6 that produc ...

Onstar.com
The website provides access to account information, manages the OnStar subscription, and allows viewing of videos of each service. Get subscription plan pricing and sign up for OnStar Vehicle Diag ...