Hummer 2006 H2 - Manual (Page 263)

Traction Control System (TCS)
Your vehicle has a Traction Control System (TCS) that
limits wheel spin. This is especially useful in slippery
road conditions. The system operates only if it senses
that any of the wheels are spinning or beginning to lose
traction. When this happens, the system applies the
brakes to limit wheel spin.
The Traction Control System may operate on dry roads
under some conditions. When this happens, you may
notice a reduction in acceleration or a pumping sound.
This is normal and doesn’t mean there’s a problem with
your vehicle. Examples of these conditions include hard
acceleration in a turn, an abrupt upshift or downshift of
the transmission or driving on rough roads.
If your vehicle is in cruise control when the TCS begins
to limit wheel spin, the cruise control will automatically
disengage. When road conditions allow you to safely
use it again, you may re-engage the cruise control. See
Cruise Control on page 3-11.
Another feature of this system is the Traction
Control 2 (TC2) mode. TC2 should be selected for
improved traction and system performance when the
vehicle is on loose surfaces such as deep sand or mud.
To enter this mode,
press the TC2 button
located on the instrument
panel to the right of
the steering wheel.
TC2 only operates in the following transfer case modes:
• Four-Wheel-High Lock
• Four-Wheel-Low Lock
• Four-Wheel-Low Lock and Rear Axle Lock
See Locking Rear Axle on page 4-10 for more
information on the rear axle lock.
It will not operate in Four-Wheel-High. If the TC2 button
is pressed while in Four-Wheel High, the light will
flash for about 15 seconds and then go out. The light
should also come on briefly when you turn the ignition
key to RUN; if it doesn’t see your dealer for service.
4-9