OnStar Services

See also:

Turn Signal Indicator
The vehicle has a turn signal indicator on the mirror. An arrow on the mirror flashes in the direction of the turn or lane change. ...

Viscosity Grade
SAE 5W–30 is the best viscosity grade for the vehicle. Do not use other viscosity grade oils such as SAE 10W–30, 10W–40, or 20W–50. If in an area of extreme cold, where the temperature falls ...

Brake Pedal Travel
See your dealer if the brake pedal does not return to normal height, or if there is a rapid increase in pedal travel. This could be a sign that brake service might be required. ...