Add-on Electrical Equipment

The OnStar system is integrated into the electrical architecture of the vehicle. Do not add any electrical equipment. See Add-On Electrical Equipment. Added electrical equipment may interfere with the operation of the OnStar system and cause it to not operate.

    See also:

    Engine Oil Life System
    The engine oil life system calculates engine oil life based on vehicle use and displays a DIC message when it is necessary to change the engine oil and filter. The oil life system should be rese ...

    Time and Date Settings
    From the Time and Date Settings screen button, press to display the Time and Date Settings menu. Set Time: Press + or − to increase or decrease the Hours and Minutes displayed on the clock. ...

    Heated and Ventilated Seats
    On vehicles with heated and ventilated seats, the controls are located on the front doors and the ignition must be on to use the feature. : Press to heat the seat and seatback. : Press to he ...