OnStar Services

See also:

Checking Coolant
The vehicle must be on a level surface when checking the coolant level. The coolant level should be at or above the FULL COLD mark when the engine is cold. The coolant level should be above the ...

Charging System Light
The charging system light comes on briefly when the ignition is turned on, but the engine is not running, as a check to show the light is working. The light turns off when the engine is started. ...

Windows
The power window switches are located on the driver door. Each passenger door has a switch that controls only that window. Press the switch to lower the window. Pull the front of the switch up to ...