TTY Users

OnStar has the ability to communicate to the deaf, hard-of-hearing, or speech-impaired customers while in the vehicle. The available dealer-installed TTY system can provide in-vehicle access to all of the OnStar services, except Virtual Advisor and OnStar Turn-by-Turn Navigation.

    See also:

    2010 GMC Terrain Review by Kelsey Mays
    It should come as little surprise that the new GMC Terrain, a corporate twin to the redesigned Chevrolet Equinox, retains most of its sibling's strengths and weaknesses. The wild card — or, more ...

    StabiliTrak® System
    The StabiliTrak system assists with directional control of the vehicle in difficult driving conditions. The system is on when the vehicle is started. ○ To turn off both Traction Control and S ...

    Shifting Into Two-Wheel Drive High
    Turn the knob to the Two-Wheel Drive High position. This can be done at any speed, except when shifting from Four-Wheel Drive Low. The indicator light will flash while shifting. It will remain on whe ...