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
    The brake master cylinder and, on manual transmission vehicles, the clutch hydraulic system use the same reservoir. See Engine Compartment Overview  for the location of the reservoir. The reser ...

    Adding Equipment to the Outside of the Vehicle
    Things added to the outside of the vehicle can affect the airflow around it. This can cause wind noise and can affect fuel economy and windshield washer performance. Check with your dealer/retail ...

    Engine Coolant Temperature Gauge
    English Shown, Metric Similar This gauge shows the engine coolant temperature. If the indicator needle moves to the hot side of the gauge toward the shaded area, the engine is too hot. If the v ...