OnStar

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Maintenance Replacement Parts
Replacement parts identified below by name, part number, or specification can be obtained from your dealer. ...

Dome Lamp Override
The dome override button is located below the exterior lamps knob. To turn the dome lamps off, press the button. The dome lamps will remain off when a door is open. This will override the ill ...

Fuel Additives
To provide cleaner air, all gasolines in the United States are now required to contain additives that help prevent engine and fuel system deposits from forming, allowing the emission control syste ...