Gasoline Specifications

At a minimum, gasoline should meet ASTM specification D 4814 in the United States or CAN/CGSB-3.5 or 3.511 in Canada. Some gasolines contain an octane-enhancing additive called methylcyclopentadienyl manganese tricarbonyl (MMT). We recommend against the use of gasolines containing MMT. See Fuel Additives  for additional information.

    See also:

    Traction Control System (TCS)/StabiliTrak® Light
    The Traction Control System (TCS)/StabiliTrak light comes on briefly when the engine is started. If the light does not come on, have the vehicle serviced by the dealer. If the system is workin ...

    Manual Operation
    (Power): Press to turn the fan on or off. (Fan Control): Press to increase or decrease the fan speed. The fan speed setting appears on the main display. Pressing either button cancels auto ...

    Your Responsibility
    You may need to increase the volume of your radio to hear the OnStar® advisor. If the light next to the OnStar® buttons is red, this means that your system is not functioning properly and should ...