As you suspect it is never really truly off .
StabiliTrak® Off
In this mode, both stability control and part of the
traction control system are disabled. Your vehicle will
still have brake-traction control, but will not be able
to use the engine speed management system. You may
still hear system noises as a result of the brake-traction
control coming on. If the controller detects excessive
wheel spin in this mode, the StabiliTrak® indicator light
may blink and the STABILITRAK ACTIVE message
may be displayed to warn the driver that damage may
occur to the transfer case.
It is recommended to leave the system on for normal
driving conditions, but it may be necessary to turn
the system off if your vehicle is stuck in sand, mud, ice
or snow, and you may want to “rock” your vehicle in
an attempt to free it. It may also be necessary to turn off
the system when driving in extreme off-road conditions
where high wheel spin is required. See If Your
Vehicle is Stuck in Sand, Mud, Ice, or Snow on
page 4-33 for more information.
For vehicles with four-wheel drive, when the transfer
case is in 4LO, the stability system is automatically
disabled. The StabiliTrak® light will come on and the
STABILITRAK OFF message will appear on the
DIC. The StabiliTrak® system cannot be turned on until
the vehicle is switched to 2HI, 4HI, or 4AWD.
The following chart describes the StabiliTrak® system
events and the corresponding messages and lights that
will be displayed on the instrument panel cluster.
4