Chevrolet 2004 Malibu Owner's Manual page 292

When you put the fuel cap back on, turn it to the right
(clockwise) until you hear a clicking sound. Make
sure you fully install the cap. 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 3-39.
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.
5-10
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 3-39.