Pontiac 2004 Montana Owner's Manual page 190

Turn and Lane-Change Signals
The turn signal has two upward (for right) and two
downward (for left) positions. These positions allow you
to signal a turn or a lane change.
To signal a turn, move the lever all the way up or down.
When the turn is finished, the lever will return
automatically.
To signal a lane change, just raise or lower the lever
until the arrow starts to flash. Hold it there until you
complete your lane change. The lever will return by itself
when you release it.
As you signal a turn or a lane change, if the arrow
flashes faster than normal, a signal bulb may be burned
out and other drivers will not see your turn signal.
3-8
An arrow on the instrument
panel cluster will flash in
the direction of the
turn or lane change.
If a bulb is burned out, replace it to help avoid an
accident. If the arrows do not go on at all when you
signal a turn, check for burned-out bulbs and check the
fuse. See Bulb Replacement on page 5-50 and Fuses
and Circuit Breakers on page 5-107.
If you have a trailer towing option with added wiring for
the trailer lamps, the signal indicator will flash at a
normal rate even if a turn signal bulb is burned
out. Check the front and rear turn signal lamps regularly
to make sure they are working.
Turn Signal On Chime
If either turn signal is left on for more than 3/4 mile
(1.2 km), a chime will sound to let the driver know to turn
it off. If you need to leave the signal on for more than
3/4 mile (1.2 km), turn off the signal and then turn
it back on.
Headlamp High/Low-Beam Changer
To change the headlamps from high to low beam or
from low to high, pull the turn signal lever all the
way toward you and release it.