Chevrolet 2006 Avalanche Owner's Manual page 112

The front axle locks and unlocks automatically when
you shift the transfer case. Some delay for the axle to
lock or unlock is normal.
For information on StabiliTrak
System on page 4-9.
Use these buttons to shift into and out of
four-wheel drive.
You can choose among four driving settings:
AUTO 4WD (Automatic Four-Wheel Drive): This
setting is ideal for use when road surface traction
conditions are variable. When driving your vehicle in
AUTO 4WD, the front axle is engaged, but the vehicle's
power is sent only to the rear wheels. When the
vehicle senses 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.
m
2 (Two-Wheel High): This setting is used for
driving in most street and highway situations. Your front
axle is not engaged in two-wheel drive. This setting
also provides the best fuel economy.
m
4 (Four-Wheel High): Use the four-wheel high
position when you need extra traction, such as on snowy
or icy roads or in most off-road situations. This setting
also engages your front axle to help drive your vehicle.
This is the best setting to use when plowing snow.
2-36
® ®
, see StabiliTrak
n
4 (Four-Wheel Low): This setting also engages
your front axle and delivers extra torque. You may never
need this setting. It sends maximum power to all four
wheels. You might choose Four Wheel-Low if you
are driving off-road in deep sand, deep mud, deep snow,
and while climbing or descending steep hills.
®
StabiliTrak will not engage in this mode. See
®
StabiliTrak System on page 4-9 for more information.
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 2-40.
NEUTRAL (N): Shift the vehicle's transfer case to
NEUTRAL only when towing your vehicle. See
Recreational Vehicle Towing on page 4-57 or Towing
Your Vehicle on page 4-56 for more information.