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Home >> GMC >> 2021 >> Terrain SLT, 4WD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Cellular, Entertainment, And Navigation System >> Description and Operation >> Radio/Audio System Description and Operation (IOS/IOT/IOU) >> OnStar® (If equipped)

OnStar® (If equipped)

When OnStar® is activated, a serial data message is sent to the radio that activates default audio settings. The fade will be set to the front, Bass and Treble are set to the mid range, the outputs are mono, when the audio source is OnStar® . OnStar® takes priority over any other audio source.

For additional OnStar® information, refer to OnStar® Description and Operation.