Locking Rear Axle - Hummer 2009 H3 Owner's Manual

4-8 Driving Your Vehicle
Adjust your driving accordingly. See
DIC Warnings and Messages on
page 3-37 for more information.
It is recommended to leave
the system on for normal driving
conditions, but it may be necessary
to turn the system off if the
vehicle is stuck in sand, mud, ice, or
snow, and it is necessary to
"rock" the vehicle to attempt to free
it. See If Your Vehicle is Stuck
in Sand, Mud, Ice, or Snow
on page 4-33 for more information.
To turn the system off, press and
release the TCS/StabiliTrak
When TCS has been turned off, this
light comes on steady and TRAC
OFF appears on the DIC. This light
flashes when TCS is active.
Press and release the
TCS/StabiliTrak button again to turn
the system back on. The TRAC
OFF message then goes off. TCS
automatically comes on whenever
the vehicle is started and resets
itself at each ignition cycle.
Adding non-dealer/non-retailer
accessories can affect the vehicle's
performance. See Accessories
®
button.
and Modifications on page 5-3.

Locking Rear Axle

For vehicles with this feature,
additional traction can be obtained
from the rear wheels when
traveling in off-road situations such
as mud, snow, sand, steep hills
and uneven terrain.
The button used to turn this feature
on or off is located on the
instrument panel.
To lock the rear axle, do the
following:
1. Place the transfer case in the
4LO Lock mode. This is the
only mode which will allow
the rear axle to lock. See
Full-Time Four-Wheel Drive on
page 2-24 for more information
regarding the transfer case
and 4LO Lock mode.