Pontiac 2007 G6 Owner's Manual page 314

While refueling, hang the tethered fuel cap from
the hook on the fuel door.
CAUTION:
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If you spill fuel and then something
ignites it, you could be badly burned. Fuel
can spray out on you if you open the fuel
cap too quickly. This spray can happen if
your tank is nearly full, and is more likely
in hot weather. Open the fuel cap slowly
and wait for any hiss noise to stop. Then
unscrew the cap all the way.
Be careful not to spill fuel. Do not top off or overfill
the tank, and wait a few seconds after you have
finished pumping before removing the nozzle.
Clean fuel from painted surfaces as soon
as possible. See Washing Your Vehicle on
page 408.
When replacing the fuel cap, turn it clockwise until it
clicks. Make sure the cap is fully installed. The
diagnostic system can determine if the fuel cap has
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been left off or improperly installed. This would
allow fuel to evaporate into the atmosphere.
See Malfunction Indicator Lamp on page 204.
The CHECK GAS CAP message will be displayed
on the Driver Information Center (DIC) if the fuel
cap is not properly installed. See DIC Warnings and
Messages on page 212 for more information.
CAUTION:
{
If a fire starts while you are refueling, do
not remove the nozzle. Shut off the flow
of fuel by shutting off the pump or by
notifying the station attendant. Leave the
area immediately.
Notice: If you need a new fuel cap, be sure to
get the right type. Your dealer can get one
for you. If you get the wrong type, it may not
fit properly. This may cause your malfunction
indicator lamp to light and may damage
your fuel tank and emissions system. See
Malfunction Indicator Lamp on page 204.