Gasoline Specifications

At a minimum, gasoline should meet ASTM specification D 4814 in the United States or CAN/CGSB-3.5 in Canada. Some gasolines may contain an octane-enhancing additive called methylcyclopentadienyl manganese tricarbonyl (MMT). General Motors recommends against the use of gasolines containing MMT.

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    Checking Coolant
    The engine coolant recovery tank is in the engine compartment on the passenger’s side of the vehicle. The cap has this symbol on it. The vehicle must be on a level surface. When your engine ...

    Key and Lock Messages
    NO REMOTE DETECTED This message displays when the transmitter battery is weak on vehicles with keyless access. See “Starting the Vehicle with a Low Transmitter Battery” under Remote Keyless ...

    Service Only Mode
    This power mode is available for service and diagnostics, and to verify the proper operation of the malfunction indicator lamp as may be required for emission inspection purposes. With the vehicle ...