Pontiac Vibe 2007 Owner's Manual page 278

To remove the fuel cap, turn it slowly
counterclockwise. On some vehicles you may
have to push in while turning the cap.
While refueling, hang the fuel cap inside of the
fuel door.
278
The fuel door release
lever is located near
the floor under the
driver's seat on the
outboard side.
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 358.
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 been left off or improperly installed.