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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    Headlights With Wipers (Available With Automatic Headlights Only)
    When this feature is active, the headlights will turn on approximately 10 seconds after the wipers are turned on if the multifunction lever (on the left side of the steering column) is placed in ...

    Folder selection
    NOTE - Selecting folders in this way is possible only within a single disc. - Only MP3/WMA/AAC folders are recognized when an attempt to select the next or previous folder is made. If no ap ...

    Starting
    Starting WARNING: Never run the engine in a closed or poorly ventilated area any longer than is needed to move your car in or out of the area. The carbon monoxide gas emitted is odorless ...