GMC 2011 Terrain Owner's Manual page 72

3-18 Seats and Restraints
Q: What is wrong with this?
A: The shoulder belt is worn under
the arm. It should be worn over
the shoulder at all times.
WARNING
You can be seriously injured if
you wear the shoulder belt under
your arm. In a crash, your body
would move too far forward,
which would increase the chance
of head and neck injury. Also, the
belt would apply too much force
to the ribs, which are not as
strong as shoulder bones. You
could also severely injure internal
organs like your liver or spleen.
The shoulder belt should go over
the shoulder and across the
chest.
Q: What is wrong with this?
A: The belt is behind the body.