GMC 2011 Sierra Denali Owner's Manual page 297

Front Axle
The front axle engages and
disengages automatically when you
shift the transfer case. Some delay
for the axle to engage or disengage
is normal.
Electronic Transfer Case
The transfer case knob is located
next to the steering column.
Use the dial to shift into and out of
Four-Wheel Drive.
Recommended Transfer Case Settings
Driving Conditions
Normal
Severe
Extreme
Vehicle in Tow*
*See Recreational Vehicle Towing on page 10 87 or Towing the Vehicle on
page 10 87.
You can choose among four driving
settings.
Indicator lights in the dial show
which setting you are 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 the
vehicle to your dealer for service.
An indicator light flashes while
shifting the transfer case and
Driving and Operating
Transfer Case Settings
2 4
YES
YES
remains illuminated 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.
2 (Two-Wheel Drive High):
This setting is used for driving in
most street and highway situations.
The front axle is not engaged in
Two-Wheel Drive. This setting also
provides the best fuel economy.
9-45
4 N
YES
YES