Automatic Transfer Case - GMC 2003 Sierra 1500 Pickup Owner's Manual

NEUTRAL (N): Shift to this setting only when your
vehicle needs to be towed. The ignition switch must be
in RUN in order to shift the lever into NEUTRAL (N).
See Recreational Vehicle Towing
on
page 4-53 or
Towing Your Vehicle
on
page 4-53.
4-Wheel Low (4LO): This setting also engages your
front axle and delivers extra torque. You may never
need 4LO. It sends maximum power to all four wheels.
You might choose 4LO if you are driving off-road in
deep sand, deep mud, deep snow and climbing
or descending steep hills.
You can shift from 2-Wheel High (2HI) to 4-Wheel High
(4HI) or from 4-Wheel High (4HI) to 2-Wheel High
(2HI) while the vehicle is moving. Your front axle will
engage faster if you take your foot off of the accelerator
for a couple of seconds after you shift. In extremely
cold weather, it may be necessary to stop or slow the
vehicle to shift into 4-Wheel High (4HI).
To shift into or out of 4-Wheel Low (4LO) or
NEUTRAL (N):
1. Slow the vehicle to a roll, about 1 to 3 mph (2 to
5 km/h) and shift an automatic transmission into
NEUTRAL (N), or with a manual transmission, press
the clutch pedal.
motion.
2. Shift the transfer case shift lever in one continuous
Don't pause in NEUTRAL (N) as you shift the transfer
case into 4 Wheel Low (4LO), or your gears could clash.
Remember that driving in 4-Wheel High (4HI) or
4-Wheel Low (4LO) may reduce fuel economy. Also,
driving in four-wheel drive
on
dry pavement could cause
your tires to wear faster and make your transfer case
harder to shift and run noisier.
Automatic Transfer Case
The transfer case buttons
are located to the left of
the instrument panel
cluster.
Use these switches to shift into and out of four-wheel
drive.
2-37