Silverado 1500 2WD V8-5.3L VIN Z Flex Fuel (2006)
Fuel: Specifications
FUEL E-85 (85% ETHANOL)
The 8th digit of your vehicle identification number (VIN) shows the code letter or number that identifies your engine. You will find the VIN at the top
left of the instrument panel.
If your vehicle has the 5.3L V8 engine (VIN Code Z only), you may use either regular unleaded gasoline or ethanol fuel containing up to 85% ethanol
(E-85). In all other engines, including the 5.3L V8 (VIN Code T), use only regular unleaded gasoline.
Only vehicles that have the 5.3L V8 engine (VIN Code Z) may use 85% ethanol fuel (E-85). General Motors encourages the use of E-85 in vehicles
that are designed to use it. The ethanol in E-85 is a "renewable" fuel, meaning it is made from renewable sources such as corn and other crops.
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://www.afdc.doe.gov/refueling_mapsite.shtml) 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 will need to refill your fuel tank more often when using E-85 than when you are using gasoline.
Regular unleaded gasoline is recommended when pulling a trailer. For payload capacity with ethanol fuel.
NOTICE: Some additives are not compatible with E-85 fuel and may harm your fuel system. Damage caused by additives would not be covered by
your new vehicle warranty. Do not use additives with E-85 fuel. Your vehicle was not designed for fuel that contains methanol. Do not use fuel
containing methanol. It can corrode metal parts in your fuel system and also damage the plastic and rubber parts. That damage would not be covered
under your warranty.
