GMC 2008 Envoy - Manual (Page 245)

TRACTION CONTROL OFF - The driver can modify
the engine speed management system by momentarily
pressing the StabiliTrak
® button on the transmission
shift handle. The StabiliTrak ® light will come on and
TRACTION CONTROL OFF will be displayed. For
vehicles without a DIC, the StabiliTrak
® indicator light
will come on. Momentarily pressing the StabiliTrak ®
button again will return the system to the STABILITRAK
ON mode.
STABILITRAK OFF - The driver can turn off StabiliTrak ®
by pressing the StabiliTrak ® button for more than
five seconds. The StabiliTrak ® light will come on and
STABILITRAK OFF will be displayed. For vehicles
without a DIC, the StabiliTrak
® indicator light will come
on. Momentarily pressing the StabiliTrak ® button again
will return the system to the STABILITRAK ON mode.
See StabiliTrak
® Off below for more information.
Traction Control Off
In this mode, stability control and brake-traction control
are functional. Engine speed management will be
modified and the driven wheels can spin more freely.
This can cause the brake-traction control to activate more
frequently. 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.
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.
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.
4-7