2002 Chevrolet Tahoe Owner's Manual - Page 327
2002 Chevrolet Tahoe Manual
Page 327 highlights
Only vehicles that have the 5.3L V8 engine (VIN Code Z) may use 85% ethanol fuel (E-85). Many service stations will not have an 85% ethanol fuel (E-85) pump available. The U. S. Department of Energy has an alternative fuels website (http://afdcmap.nrel.gov/nrel/) that can help you find E-85 fuel. Those stations that do have E-85 should have a label indicating ethanol content. Do not use the fuel if the ethanol content is greater than 85%. Your vehicle may not operate properly if the ethanol content is greater than 85%. At a minimum, E-85 should meet ASTM Specification D 5798. To insure quick starts in the wintertime, the E-85 fuel must be formulated properly for your climate according to ASTM specification D 5798. If you have trouble starting on E-85, it may be because your E-85 fuel is not properly formulated for your climate. If this happens, switching to gasoline or adding gasoline to your fuel tank may improve starting. Your vehicle is designed to accommodate a mixture of gasoline and E-85 fuel. For good starting and heater efficiency below 32_F (0_C), the fuel mix in the fuel tank should contain no more than 70% ethanol. E-85 has less energy per gallon than gasoline, so you'll need to refill your fuel tank more often when using E-85 than when you're using gasoline. Regular unleaded gasoline is recommended when pulling a trailer. For payload capacity with ethanol fuel see "Loading Your Vehicle" in the Index. NOTICE: Some additives are not compatible with E-85 fuel and may harm your fuel system. Damage caused by additives wouldn't be covered by your new vehicle warranty. Don't use additives with E-85 fuel. NOTICE: Your vehicle was not designed for fuel that contains methanol. It can corrode metal parts in your fuel system and also damage plastic and rubber parts. That damage wouldn't be covered under your warranty. Don't use fuel containing methanol. 6-6