GMC 2011 Sierra - Manual (Page 349)

Black plate (55,1) GMC Sierra Owner Manual - 2011
Driving and Operating 9-55
A Four-Wheel Drive indicator light
comes on when you shift into
four-wheel drive and the front axle
engages. See Four-Wheel-Drive
Light on page 5‑29.
Some delay between shifting and
when the indicator light comes on is
normal.
Recommended Transfer Case Settings
Driving Conditions
Transfer Case Settings
2m 4m 4n N
Normal YES
Severe YES
Extreme YES
Vehicle in Tow* YES
*See Recreational Vehicle Towing on page 10‑103 or Towing the Vehicle
on page 10‑103.
Notice: Driving on clean, dry
pavement in four-wheel drive for
an extended period of time can
cause premature wear on the
vehicle's powertrain. Do not
drive on clean, dry pavement in
Four-Wheel Drive for extended
periods of time.
4
n
(Four-Wheel Drive Low): This
setting also engages the front axle
and delivers extra torque. You may
never need Four-Wheel Drive Low.
It sends maximum power to all
four wheels. You might choose
Four-Wheel Drive Low if you are
driving off-road in deep sand,
deep mud, deep snow, and while
climbing or descending steep hills.