OnStar Help: TTY

Does OnStar offer TTY services?

We offer in-vehicle TTY services, delivering OnStar services via text messages. A dial pad will also provide access to OnStar calling. We offer 24/7 connectivity to a dedicated TTY Advisor, so you’ll have the peace of mind of knowing that, when you need help, we can pinpoint your location and quickly contact emergency service providers on your behalf.

How can I get TTY equipment for my account?

Eligible Members can request TTY equipment through their GM Dealer. Most or all of the equipment cost can be reimbursed through the GM Mobility Reimbursement Program during the first year of ownership, subject to program rules. The use of OnStar services requires an active OnStar service plan.

OnStar TTY requires a 2007 model year or newer vehicle purchase or lease with OnStar Generation 7.0 hardware. At this time, OnStar TTY is not available in Canada because TTY is not supported by Canada’s wireless carriers.

What OnStar services are available through TTY in my vehicle?

Once your TTY equipment is installed, OnStar services will be available to you based on your service plan (excluding OnStar Turn-by-Turn Navigation). If you have the Guidance Plan, driving directions and point-of-interest locations can be delivered via the TTY device. Please note, lengthy or intricate routes may be cumbersome.

Can I transfer my TTY equipment?

The TTY device may be transferred in and out of the vehicle. Damaged or misplaced equipment may prohibit communication with OnStar. Also, it is your responsibility to keep your TTY device fully charged. Please see your manufacturer’s reference manual for instructions and details.

How does TTY work in emergencies?

For Members with a paid service plan, push the red Emergency button to connect to a dedicated OnStar TTY Advisor who can locate your vehicle, find out what type of assistance you need, and call nearby emergency service providers who can dispatch appropriate emergency responders. If you cannot answer, an OnStar Advisor will contact a nearby emergency services provider who will dispatch help to your determined location.

If you accidentally push the red Emergency button, you must disconnect within 10 seconds by pushing the phone button on the OnStar three-button system. If the OnStar Emergency Advisor does not receive a response, we will dispatch emergency service providers to your location.

You can also contact us with our dedicated TTY toll-free line, 1.877.248.2080. While email may be your primary mode of communication, it is absolutely necessary that you contact OnStar via telephone in emergency situations.

Can I use TTY to make a phone call in the vehicle?

OnStar-equipped vehicles can make and receive TTY phone calls through the dealer-installed dial pad. For safety, this service is not available when your vehicle is moving. When you are in TTY mode, the phone button on the three-button OnStar system is disabled. To make calls, you must use the dealer-installed dial pad. OnStar Shared Minutes plans are currently not available with the TTY system.

Can I receive TTY calls through OnStar?

When the vehicle is not moving, the green status light on the OnStar TTY interface module will blink when you receive an incoming personal call. To answer, push the phone button on the dial pad.

How can I redial a call?

Push the phone button on the dial pad to redial the last number dialed or received. Refer to the TTY manufacturer’s reference manual for details on functionality of the TTY device.

How do I end my TTY call?

If you are communicating with an OnStar TTY Advisor through the blue button, the Advisor will disconnect the call after your conversation ends. If you are on a personal phone call, use the phone button on the dial pad to end the call.

Can I call another TTY user?

To call to another TTY user from your vehicle, you can dial direct using the dial pad provided. If you would like to make a personal call from your vehicle to a non-TTY user, you must use the relay service. You will not need the relay service to communicate with OnStar TTY Advisors, because they have TTY capability.

How can I resolve issues with my OnStar TTY?

Your TTY device is manufactured by an independent manufacturer and is covered by the manufacturer’s warranty; it is not covered under the GM new vehicle limited warranty. All other parts are covered by the standard parts and labor warranty of your new vehicle.

How can I tell if my TTY unit is working?

If you are having problems with your TTY, make sure the status light next to your three-button OnStar system (located either in your rearview mirror or in your overhead console) is green.

  • If the status light is not green, try turning your vehicle’s ignition off and then on. If the status light next to the three-button system does not illuminate, this may indicate a problem with your OnStar system.
  • If the LED is not illuminated, check that the TTY device is properly plugged in. Re-plug it into the TTY jack, and ensure the OTIM is set to TTY mode by pushing the mode button until the mode LED illuminates. If the lights are still not illuminated, please call OnStar via the TTY toll-free number, 1.877.248.2080, or visit your GM Dealer.
  • Make sure the TTY device is fully charged. If it is fully charged, cellular connectivity issues may be affecting your call. In that case, please disconnect your call and try again in a few minutes.

What are the TTY status lights?

  • Green: Your TTY system in the vehicle is ON and is ready to make or receive calls.
  • Blinking Green: A call is in progress, or there’s an incoming personal call.
  • Red: Your TTY device may not be functioning properly. Push the OnStar button to attempt to contact an OnStar Advisor for assistance. If you cannot contact us, please take your vehicle to your nearby GM dealership as soon as possible for diagnosis of the system.
  • No light: This signals that your OnStar system is in standard Voice mode. Check to ensure that your TTY device connection is secure. If the status light is still off, please take your vehicle to your nearby GM dealership as soon as possible for diagnosis of the system.

How can I contact OnStar TTY?

You may call the OnStar toll-free TTY number: 1.877.248.2080 or email: TTY@onstar.com.