Pontiac 2009 Vibe Owner's Manual page 22

1-18 Seats and Restraints
Adjust the height so that the
shoulder portion of the belt is
centered on the shoulder. The belt
should be away from the face and
neck, but not falling off of the
shoulder. Improper shoulder belt
height adjustment could reduce the
effectiveness of the safety belt in a
crash.
Push down on the release button
and move the height adjuster to
the desired position. The adjuster
can be moved up by pushing on the
front of the height adjuster.
After the adjuster is set to the
desired position, try to move it
down without pushing the button
to make sure it has locked into
position.
Safety Belt Pretensioners
This vehicle has safety belt
pretensioners for the front outboard
occupants. Although the safety belt
pretensioners cannot be seen, they
are part of the safety belt assembly.
They can help tighten the safety belts
during the early stages of a moderate
to severe frontal and near frontal
crash if the threshold conditions for
pretensioner activation are met.
And, if the vehicle has side impact
airbags, safety belt pretensioners
can help tighten the safety belts in a
side crash.
If the passenger sensing system
detects that there is not a passenger
in the right front passenger position,
the safety belt pretensioner for that
position will not activate. See
Passenger Sensing System on
page 1-28.
Pretensioners work only once. If the
pretensioners activate in a crash,
they will need to be replaced, and
probably other new parts for your
safety belt system. See Replacing
Safety Belt System Parts After a
Crash on page 1-20.