GMC Sierra Denali Classic 2007 Owner's Manual page 330

To remove the fuel cap, turn it slowly
counterclockwise. It will require more effort to turn
the fuel cap on the last turn as you loosen it.
CAUTION:
{
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 427.
When replacing the fuel cap, turn it clockwise
until it clicks. It will require more effort to turn
the fuel cap on the last turn as you tighten it.
Make sure the cap is fully installed. The diagnostic
system can determine if the fuel cap has been
330
left off or improperly installed. This would allow
fuel to evaporate into the atmosphere. See
Malfunction Indicator Lamp on page 180.
The TIGHTEN FUEL 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 190 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 180.