Automatic Transfer Case - GMC Sierra 2005 Owner's Manual

Automatic Transfer Case

Use these switches to shift into and out of four-wheel
drive.
2-40
The transfer case
buttons are located
to the left of the
instrument panel
cluster.
Recommended Transfer Case Settings
Driving
Conditions m
2
Normal YES
Variable
Severe
Extreme
Vehicle
in Tow*
*See "Recreational Vehicle Towing" in the Index for
further information.
You can choose among four driving settings:
AUTO 4WD: This setting is ideal for use when road
surface traction conditions are variable. When driving
your vehicle in AUTO four-wheel drive, the front axle
is engaged, but the vehicle's power is sent to the
rear wheels. When the vehicle detects a loss of traction,
the system will automatically engage four-wheel drive.
Driving in this mode results in slightly lower fuel
economy than Two-Wheel High.
Transfer Case Settings
AUTO
m n
4 4
4WD
YES
YES
YES
N
YES