Recommended Fuel

Use regular unleaded gasoline with a posted octane rating of 87 or higher. If the octane rating is less than 87, an audible knocking noise, commonly referred to as spark knock, might be heard when driving.

If this occurs, use a gasoline rated at 87 octane or higher as soon as possible. If heavy knocking is heard when using gasoline rated at 87 octane or higher, the engine needs service.

    See also:

    Transferring Service
    Push to request account transfer eligibility information. The Advisor can assist in canceling or removing account information. If OnStar receives information that vehicle ownership has chan ...

    Call Waiting
    Call waiting must be supported on the cell phone and enabled by the wireless service carrier. Press to answer an incoming call when another call is active. The original call is placed on hol ...

    Languages
    The vehicle supports English, French (Canadian), and Spanish. The default language is English. To change the display language, see Vehicle Personalization for more information. ...