GMC 2007 Sierra 1500 Pickup Owner's Manual page 157

Shifting In or Out of 4L (Four-Wheel
Drive Low)
Notice: Shifting the transfer case into 4L
while moving at speeds faster than 3 mph
(5 km/h) may cause premature wear to
the transfer case, and may cause the gears to
grind. To avoid causing premature wear,
and grinding the gears, do not shift the transfer
case into 4L while the vehicle is moving
faster than 3 mph (5 km/h).
Shifts into 4L can be made with the vehicle at a
stop, or while slowly rolling about 1 to 3 mph
(2 to 5 km/h).
•
Shift the automatic transmission into
NEUTRAL (N), or with a manual transmission,
press the clutch pedal, or shift into NEUTRAL.
•
Shift the transfer case shift lever in one
continuous motion into the 4L position.
•
When in 4L do not drive faster than 45 mph.
This will reduce wear and extend the life of
the transfer case.
Shifting In or Out of NEUTRAL
1. With the vehicle running and the engine at an
idle set the parking brake and apply the
regular brake.
2. Place the transmission into NEUTRAL (N).
Shift the transfer case in one continuous motion
into or out of the NEUTRAL position.
Automatic Transfer Case
Use these switches to shift into and out of
four-wheel drive.
The transfer case
buttons are located to
the left of the instrument
panel cluster.
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