Braking In Emergencies; Locking Rear Axle; Stabilitrak System - GMC 2008 Yukon Owner's Manual

Using ABS
Do not pump the brakes. Just hold the brake pedal
down firmly and let antilock work for you. You might feel
the brakes vibrate or notice some noise, but this is
normal.

Braking in Emergencies

With ABS, you can steer and brake at the same time. In
many emergencies, steering can help you more than
even the very best braking.

Locking Rear Axle

If your vehicle has this feature, your locking rear axle
can give you additional traction on snow, mud, ice, sand
or gravel. It works like a standard axle most of the
time, but when one of the rear wheels has no traction
and the other does, this feature will allow the wheel with
traction to move the vehicle.
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StabiliTrak System
Your vehicle may have the StabiliTrak
combines antilock brake, traction and stability control
systems and helps the driver maintain directional control
of the vehicle in most driving conditions.
4-6
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system which
When you first start your vehicle and begin to drive away,
the system performs several diagnostic checks to ensure
there are no problems. You may hear or feel the system
working. This is normal and does not mean there is a
problem with your vehicle. The system should initialize
before the vehicle reaches 20 mph (32 km/h). In some
cases, it may take approximately two miles of driving
before the system initializes.
If the system fails to turn on or activate, the StabiliTrak
light along with one of the following messages will be
displayed on the Driver Information Center (DIC):
TRACTION CONTROL OFF, SERVICE TRACTION
CONTROL, STABILITRAK OFF, SERVICE
STABILITRAK. If these DIC messages appear, make
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sure the StabiliTrak system has not been turned off
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using the StabiliTrak on/off button. Then turn the
steering wheel clockwise from the nine o'clock position to
the three o'clock position. If this clears the message(s),
your vehicle does not need servicing. If this does not
clear the message(s), then turn the vehicle off, wait
15 seconds, and then turn it back on again to reset the
system. If any of these messages still appear on the
Driver Information Center (DIC), your vehicle should be
taken in for service. For more information on the DIC
messages, see Driver Information Center (DIC) on
page 3-55.
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