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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    Making a Call
    Calls can be made using the following commands: ► Dial ► Digit Dial ► Call ► Re-dial ...

    Available Services included withDirections & Connections® Plan
    • All Safe and Sound Plan Services • Driving Directions - Advisor delivered or OnStar® Turn-by-Turn Navigation (If equipped) • RideAssist • Information and Convenience Services ...

    Total Weight on the Vehicle’s Tires
    Be sure the vehicle’s tires are inflated to the upper limit for cold tires. These numbers can be found on the Certification/Tire label. See Loading the Vehicle. Make sure not to go over the GVW ...