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:

    BRAKE FLUID LOW
    This message is displayed when the brake fluid level is low. See Brake Fluid. ...

    Air Quality Sensor
    This will allow you to select whether the system will operate at high or low sensitivity. Only vehicles with the dual zone climate control will have this option. Press SELECT when Air Quality ...

    Cold Temperature Operation
    If in an area of extreme cold, where the temperature falls below −20°F (−29°C), use either an SAE 5W-30 synthetic oil or an SAE 0W-30 engine oil. Both provide easier cold starting ...