GMC YUKON XL 2003 Manual page 220

SERVICE STABILITY
STABILITY SYS DISABLED
If you ever see the SERVICE STABILITY message, it
means there may be a problem with your
StabiIitraP system. !f you see this message try to reset
the system (stop; turn off the engine; then start the
engine again). If the SERVICE STABILITY message still
comes on, it means there is a problem. You should
see your dealer for service. The vehicle is safe to drive,
however, you do not have the benefit of Stabilitrak@ ,
so reduce your speed and drive accordingly.
STABILITY SYS ACTIVE
You may see the STABILITY SYS ACTIVE message on
the DIC. It means that an advanced computer-controlled
system has come on to help your vehicle continue to
go in the direction in which you're steering.
Stabilitrak@ activates when the computer senses that
your vehicle is just starting to spin, as it might if you hit
a patch of ice or other slippery spot on the road.
When the system activates, you may hear a noise or
feel a vibration in the brake pedal. This is normal. When
the STABILITY SYS ACTIVE message is on, you
should continue to steer in the direction you want to go.
The system is designed to help you in bad weather
or other difficult driving situations by making the most of
whatever road conditions will permit.
The STABILITY SYS DISABLED message will turn or1
when you press the Stabilitrak@ button, or when the
stability contro!
has
been automatically disabled. To limit
wheel spin and realize the full benefits of the stability
enhancement system, you should normally leave
Stabilitrak@ on. However, you should turn Stabilitrak@ off
if your vehicle gets stuck in sand, mud, ice or snow
and you want to "rock your vehicle to attempt to free it,
or if you are driving in extreme off-road conditions
and require more wheel spin. See If You Are Stuck: In
Sand, Mud, Ice or Snow on page 4-50. To turn the
Stabilitrak@ system back on press the Stabilitrak@ button
again. There are four conditions that can cause this
message to appear. One condition is overheating, which
could occur if Stabilitrak@ activates continuously for
an extended period of time. The message will also be
displayed if the brake system warning light is on.
See Brake
System
Warning Light on page 3-41. The
message could be displayed if the stability system takes
longer than usual to complete its diagnostic checks
due to driving conditions. Also, if an engine or vehicle
related problem has been detected, and the vehicle
needs service, the message will appear.
The message will turn off as soon as the conditions that
caused the message to be displayed are no longer
present.
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