Hummer 2009 H2 - Manual (Page 363)

The fuel cap is located on
the driver side of the
vehicle.
Open the door to access the fuel cap. To remove the
fuel cap, turn it slowly counterclockwise. While refueling,
let the fuel cap hang by the tether, if it has one. If the
vehicle has E85 fuel capability, the fuel cap will be
yellow and state that E85 or gasoline can be used.
See Fuel E85 (85% Ethanol) on page 5-7.
{ CAUTION:
Fuel can spray out on you if you open the fuel cap
too quickly. If you spill fuel and then something
ignites it, you could be badly burned. This spray
can happen if the 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 5-105.
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. This would allow fuel
to evaporate into the atmosphere. See Malfunction
Indicator Lamp on page 3-40.
5-9