GMC 2009 Sierra - Manual (Page 144)

Turn and Lane-Change Signals
The turn signal has two upward (for right) and
two downward (for left) positions. Each position
signals 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 returns automatically
to the starting position.
To signal a lane change, raise or lower the lever until
the arrow starts to flash. Hold it there until your
lane change is completed. The lever returns to the
starting position by itself when it is released.
An arrow on the instrument
panel cluster will flash in
the direction of the
turn or lane change.
If the arrows flash more quickly than normal as you
signal a turn or a lane change, a signal bulb might be
burned out and other drivers will not see the turn signal.
If a bulb is burned out, replace it to help avoid an
accident. If the arrows do not come on when you signal
a turn, check for burned-out bulbs and a blown fuse.
See Fuses and Circuit Breakers on page 5-108.
Turn Signal On Chime
If your turn signal is left on for more than 3/4 of a mile
(1.2 km), a chime sounds at each flash of the turn signal
and the message TURN SIGNAL ON also appears in
the Driver Information Center (DIC). Move the turn
signal lever to the off position, to turn the chime and
message off.
Headlamp High/Low-Beam Changer
53 (Headlamp High/Low Beam Changer):
Push the lever toward the instrument panel, to change
the headlamps from low to high beam.
Pull the multifunction lever toward you and release it,
to return to low-beam headlamps.
When the high beams are
on, this indicator light on
the instrument panel
cluster will also be on.
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