GMC 2013 Sierra Owner's Manual page 29

Automatic Transfer Case
This transfer case knob is located
next to the steering column.
Each transfer case design offers
different drive options. The list
below describes the different drive
options that may be available.
2 (Two-Wheel-Drive High): This
setting is used for driving in most
street and highway situations.
AUTO (Automatic Four-Wheel
Drive): This setting is ideal for use
when road surface traction
conditions are variable.
4 (Four-Wheel High): Use the
Four-Wheel-Drive High position
when extra traction is needed, such
as on snowy or icy roads or in most
off-road situations.
N (Neutral): Shift the transfer case
to Neutral only when towing the
vehicle. See Recreational Vehicle
Towing on page 10 87 or Trailer
Towing on page 9 73.
I n f o r ma t i o n P r o v i d e d b y :
In Brief
4 (Four-Wheel-Drive Low): This
setting 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.
See Four-Wheel Drive on
page 9 38.
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