GMC 2001 Sierra - Manual (Page 135)

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Turn Signal/Multifunction Lever
The lever on the left side of the steering column
includes your:
D Turn Signal and Lane Change Indicator
D Headlamp High/Low Beam Changer
D Flash
- to - Pass
D Windshield Wipers
D Windshield Washer
D Cruise Control (If Equipped)
Turn Signal 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.
An arrow on the instrument
panel will flash in the
direction of the turn or
lane change.
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.
If you move the lever all the way up or down, and the arrow
flashes at twice the normal rate, a signal bulb may be burned
out and other drivers may not see your turn signal.
If a bulb is burned out, replace it to help avoid an accident.
If the arrows don’t go on at all when you signal a turn,
check for burned
- out bulbs or a blown fuse (see “Fuses
and Circuit Breakers” in the Index).