Chevrolet 2007 TrailBlazer Owner's Manua page 123

CAUTION:
{
Shifting the transfer case to NEUTRAL can
cause your vehicle to roll even if the
transmission is in PARK (P). You or
someone else could be seriously injured.
Be sure to set the parking brake before
placing the transfer case in NEUTRAL.
See Parking Brake on page 126.
NEUTRAL: Shift the vehicle's transfer case to
NEUTRAL only when towing your vehicle.
See Recreational Vehicle Towing on page 362 for
more information.
An indicator light in the knob will show you which
position the transfer case is in. The indicator lights
will come on briefly when you turn on the ignition
and one will stay on. If the lights do not come on,
you should take your vehicle to your dealer for
service. An indicator light will flash while shifting
the transfer case. It will stay on when the shift is
complete. If for some reason the transfer case
cannot make a requested shift, it will return to the
last chosen setting.
If the service Four-Wheel Drive Warning Light on
the instrument panel cluster stays on, you
should take your vehicle to your dealer for service.
See Service Four-Wheel Drive Warning Light on
page 218 for further information.
Shifting Into Four-Wheel High or Automatic
Four-Wheel Drive
Turn the knob to Four-Wheel High or Automatic
Four-Wheel Drive. This can be done at any speed
unless you are shifting out of Four-Wheel Low.
The indicator light will flash while shifting.
It will remain on when the shift is complete.
Shifting Into Two-Wheel High
Turn the knob to Two-Wheel High. This can be
done at any speed unless you are shifting
out of Four-Wheel Low.
123