Gasoline Specifications; California Fuel - Chevrolet Silverado 2004 Owner's Manual

Gasoline Specifications
It is recommended that gasoline meet specifications
which were developed by automobile manufacturers
around the world and contained in the World-Wide
Fuel Charter which is available from the Alliance of
Automobile Manufacturers at www.autoalliance.org/
fuel_charter.htm. Gasoline meeting these specifications
could provide improved driveability and emission control
system performance compared to other gasoline.
Canada Only
5-6
In Canada, look for the
"Auto Makers' Choice"
label on the pump.

California Fuel

If your vehicle is certified to meet California Emission
Standards (see the underhood emission control label),
it is designed to operate on fuels that meet California
specifications. If this fuel is not available in states
adopting California emissions standards, your vehicle
will operate satisfactorily on fuels meeting federal
specifications, but emission control system performance
may be affected. The malfunction indicator lamp may
turn on (see Malfunction Indicator Lamp on page 3-48 )
and your vehicle may fail a smog-check test. If this
occurs, return to your authorized GM dealer for
diagnosis. If it is determined that the condition is caused
by the type of fuel used, repairs may not be covered
by your warranty.