What are the buttons on my rear view mirror Chevy?
In Chevrolet models, the rear-view mirror buttons are typically for OnStar emergency and assistance services and, if equipped, a HomeLink garage-door opener. Some trims also show a compass/temperature readout or offer auto-dimming options; exact layout varies by model and year.
Common mirror button clusters you’ll encounter
The following list covers the typical controls you may find on a Chevy’s auto-dimming rear-view mirror, including OnStar and HomeLink features.
- Red SOS button — emergency assistance. Press to call OnStar or emergency services, depending on your subscription and system setup.
- Blue OnStar button — access to an OnStar advisor for help, navigation, or diagnostics.
- Phone or Call button — answer or initiate hands-free phone calls through OnStar or connected services.
- Voice command or Microphone button — activate voice prompts or hands-free system dialogue in supported models.
- HomeLink garage-door opener — three programmable buttons (often labeled 1, 2, and 3) that can operate compatible garage doors, gates, or other home automation devices.
Note: OnStar services require an active subscription, and HomeLink programming varies by device and installation. The exact button arrangement differs by trim, year, and market, so your mirror may show a subset of these controls.
Optional readouts and dimming features that appear on some mirrors
Some Chevrolet models include additional features on or near the mirror face, which may or may not involve physical buttons. These can include a compass, an outside temperature readout, and controls for auto-dimming behavior.
- Compass and outside temperature display — a small digital readout that can show the vehicle’s compass direction and outdoor temperature when enabled.
- Auto-dimming control or sensor-related options — some mirrors provide a toggle or setting to adjust or disable the automatic glare-reduction feature.
If your mirror lacks OnStar or HomeLink, you likely have a simpler auto-dimming mirror or a different integration in your specific model/year. Always consult your owner's manual for model-specific details.
How to use HomeLink and OnStar features
To use HomeLink, you typically program the three buttons by pressing and holding the desired button while simultaneously pressing and holding your garage door remote until the indicator light flashes. Release both buttons to complete programming, then test the opener. For OnStar, press the blue OnStar button to connect with a live advisor or the red SOS button in an emergency, and follow the prompts. The voice-command or phone buttons activate respective hands-free features where supported.
If you’re unsure which controls your Chevrolet has, or you’re trying to set up a feature, refer to the exact owner’s manual for your year and trim level or contact a Chevrolet dealer for a quick walkthrough.
Summary
Most Chevy rear-view mirrors with buttons center on OnStar emergency/assistance controls and a HomeLink garage-door opener, with optional compass/temperature readouts and auto-dimming controls in higher trims. Because layouts vary by model and year, verify with your owner’s manual or dealer if you’re unsure which controls your mirror includes.
