Four-Wheel Drive; Automatic Transfer Case; Front Axle Locking Feature - GMC 2008 Yukon Owner's Manual

Four-Wheel Drive

If your vehicle has four-wheel drive, you can send your
engine's driving power to all four wheels for extra
traction. Read the part that follows before using
four-wheel drive.
Notice: Driving on clean, dry pavement in
Four-Wheel-Drive High or Four-Wheel-Drive Low for
an extended period of time may cause premature
wear on your vehicle's powertrain. Do not drive on
clean, dry pavement in Four-Wheel-Drive High or
Four-Wheel-Drive Low for extended periods of time.
While driving on clean dry pavement and during tight
turns, you may experience a vibration in the steering
system.

Front Axle Locking Feature

The front axle locks and unlocks automatically when
you shift the transfer case. Some delay for the axle to
lock or unlock is normal.
2-38

Automatic Transfer Case

Your vehicle has Four Wheel Drive with StabiliTrak
For information on StabiliTrak
on page 4-6.
Use this dial to shift into and out of four-wheel drive.
You can choose among five driving settings:
Indicator lights in the switches show you which setting
you are in. The indicator lights will come on briefly when
you turn on the ignition and the last chosen setting will
stay on. If the lights do not come on, you should take your
vehicle in for service. An indicator light will flash while
shifting. Fast flashing means the conditions were not met
to make the desired shift, typically the vehicle was going
too fast, the automatic transmission was not in neutral.
The transfer case knob is
located to the left of the
instrument panel cluster.
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, see StabiliTrak System