DRIVING AND OPERATING 241system performance may be affected.The malfunction indicator lamp couldturn on and the vehicle may not passa smog-check test. See MalfunctionIndicator Lamp (Check Engine Light)0 125. If this occurs, return to yourauthorized dealer for diagnosis. If it isdetermined that the condition iscaused by the type of fuel used,repairs may not be covered by thevehicle warranty.Fuels in Foreign CountriesThe U.S., Canada, and Mexico postfuel octane ratings in anti-knock index(AKI). For fuel not to use in a foreigncountry, see “Prohibited Fuels” in Fuel0 239.Fuel AdditivesTo keep fuel systems clean, TOP TIERdetergent gasoline is recommended.See Fuel 0 239.If TOP TIER detergent gasoline is notavailable, one bottle of GM FuelSystem Treatment Cleaner added tothe fuel tank at every engine oilchange, can help. GM Fuel SystemTreatment Cleaner is the only gasolineadditive recommended by GeneralMotors. It is available at your dealer.Filling the Tank{ WarningFuel vapors and fuel fires burnviolently and can cause injury ordeath.. To help avoid injuries to youand others, read and followall the instructions on thefuel pump island.. Turn off the engine whenrefueling.. Keep sparks, flames, andsmoking materials awayfrom fuel.. Do not leave the fuel pumpunattended.. Do not use a cell phone whilerefueling.. Do not reenter the vehiclewhile pumping fuel.(Continued)Warning (Continued). Keep children away from thefuel pump and never letchildren pump fuel.. Fuel can spray out if therefueling nozzle is insertedtoo quickly. This spray canhappen if the tank is nearlyfull, and is more likely in hotweather. Insert the refuelingnozzle slowly and wait for anyhiss noise to stop prior tobeginning to flow fuel.
