OnStar Services

See also:

Windshield Washer Fluid
What to Use When the vehicle needs windshield washer fluid, be sure to read the manufacturer’s instructions before use. If the vehicle will be operating in an area where the temperature may fa ...

Tire Pressure
Tires need the correct amount of air pressure to operate effectively. Notice: Neither tire underinflation nor overinflation is good. Underinflated tires, or tires that do not have enough ...

Fog Lamps
To turn on the fog lamps, the ignition and the headlamps or parking lamps must be on. If the fog lamps are turned on while the exterior lamp switch is in the AUTO position, the headlamps come on ...