GMC 2001 Savana - Manual (Page 144)

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Fuel Gage
United States Canada
The fuel gage, when the ignition is on, tells you about
how much fuel you have left in your tank.
The gage will first indicate empty before you are out of
fuel, and you should get more fuel as soon as possible.
Listed are four situations you may experience with your
fuel gage:
D At the gas station, the fuel pump shuts off before the
gage reads full.
D It takes a little more or less fuel to fill up than the
fuel gage indicated. For example, the gage may have
indicated the tank was half full, but it actually took a
little more or less than half the tank’s capacity to fill
the tank.
D The gage moves a little when you turn a corner or
speed up.
D The gage doesn’t go back to empty when you turn
off the ignition.
None of these indicate a problem with the fuel gage.