GMC Terrain: Diagnostics - OnStar Services - OnStar - GMC Terrain Owner's ManualGMC Terrain: Diagnostics

OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if the vehicle is equipped with the Tire Pressure Monitoring System. If a diagnostics check is needed between e-mails, push OnStar Additional Information, and an Advisor can run a check.

    OnStar Mobile App
    With an iPhone® or Android™-based mobile device, an OnStar mobile app can be downloaded. The vehicle can be remote started, if equipped, or the doors can be unlocked from anywhere there is cell ...

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    Warnings And Cautions
    This Owner’s Manual contains WARNINGS against operating procedures that could result in a collision or bodily injury. It also contains CAUTIONS against procedures that could result in damage t ...

    Changing a Flat Tire
    If you have a flat tire while driving, stop in a safe place to change it. Drive slowly along the shoulder until you get to an exit or an area to stop that is far away from the traffic lanes. ...

    RearView monitor (if so equipped)
    When the selector lever is shifted into the R (Reverse) position, the monitor display shows the view to the rear of the vehicle. The system is designed as an aid to the driver in detecting larg ...