GMC 2011 Sierra Owner's Manual page 365

When the vehicle is started
and begins to move, the system
performs several diagnostic checks
to insure there are no problems.
The system may be heard or
felt while it is working. This is
normal and does not mean there
is a problem with the vehicle.
The system should initialize
before the vehicle reaches 32 km/h
(20 mph). In some cases, it may
take approximately 3.2 km (2 mi) of
driving before the system initializes.
If cruise control is being used when
StabiliTrak activates, the cruise
control automatically disengages.
The cruise control can be
re-engaged when road conditions
allow. See
for more information.
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 sure the
StabiliTrak system has not been
turned off using the StabiliTrak
on/off button. Then turn the vehicle
off, wait 15 seconds, and turn it
back on again to reset the system.
If any of these messages still
appear on the DIC, the vehicle
should be taken in for service.
For more information on the DIC
messages, see
The StabiliTrak light will flash on the
instrument panel cluster when the
system is both on and activated.
The system may be heard or felt
while it is working; this is normal.
The traction control disable button
is located on the instrument panel
below the climate controls.
The Traction Control System (TCS)
part of StabiliTrak can be turned
off by pressing and releasing the
.
StabiliTrak button. To disable both
TCS and StabiliTrak, press and
hold until illuminates and the
appropriate DIC message displays.
TCS and StabiliTrak can be turned
on by pressing and releasing the
StabiliTrak button if they are not
automatically shut off for any other
reason.