GMC 2018 Terrain Owner's Manual page 39

38 Keys, Doors, and Windows
To open the liftgate, press the touch
pad on the bottom of the liftgate and
lift up.
Use the pull cup to lower and close
the liftgate. Do not press the touch
pad while closing the liftgate. This
may cause the liftgate to be
unlatched.
Always close the liftgate before
driving.
Power Liftgate Operation
Warning
You or others could be injured if
caught in the path of the power
liftgate. Make sure there is no one
in the way of the liftgate as it is
opening and closing.
Caution
To avoid damage to the liftgate or
liftgate glass, make sure the area
above and behind the liftgate is
clear before opening it.
If equipped with a power liftgate, the
switch is usually on the driver door.
The switch can also be on the
overhead console. The vehicle must
be in P (Park).
The modes are:
MAX: Opens to maximum
height.
3/4: Opens to a reduced height
that can be set from 3/4 to fully
open. Use to prevent the liftgate
from opening into overhead
obstructions such as a garage
door or roof-mounted cargo. The
liftgate can be manually opened
all the way.