Braking In Emergencies; Stabilitrak System - Hummer H2 2009 Owner's Manual

Using ABS
Do not pump the brakes. Just hold the brake pedal
down firmly and let antilock work. The brakes might
vibrate or some noise might be heard, but this is normal.

Braking in Emergencies

ABS allows the driver to steer and brake at the same
time. In many emergencies, steering can help more than
even the very best braking.
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StabiliTrak System
The vehicle has the StabiliTrak system which combines
antilock brake, traction and stability control systems
and helps the driver maintain directional control of the
vehicle in most driving conditions.
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 20 mph (32 km/h).
In some cases, it may take approximately two miles of
driving before the system initializes.
4-6
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. If this clears the message(s),
the 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), the vehicle should be
taken in for service. For more information on the DIC
messages, see Driver Information Center (DIC) on
page 3-46.
The system may be heard or felt while it is working; this
is normal.
The StabiliTrak light will
flash on the instrument
panel cluster when the
system is both on and
activated.