Automatic Transfer Case; Front Axle - GMC 2009 Yukon XL Owner's Manual

Four-Wheel Drive
If the vehicle has four-wheel drive, you can send the
engine's driving power to all four wheels for extra
traction. Read the following 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.
The vehicle has StabiliTrak
Four-Wheel-Drive Low will turn Traction Control
®
and StabiliTrak off. See StabiliTrak
page 4-6.

Front Axle

The front axle engages and disengages automatically
when you shift the transfer case. Some delay for
the axle to engage or disengage is normal.
®
. Shifting into
®
System on

Automatic Transfer Case

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
the vehicle to your dealer/retailer for service. An
indicator light will flash while shifting. It will stay on
when the shift is completed. If for some reason
the transfer case cannot make a requested shift, it will
return to the last chosen setting.
The transfer case knob is
located to the left of the
instrument panel cluster.
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