GMC 2007 Savana - Manual (Page 31)

To unlatch the belt, push the button on the buckle.
The belt should go back out of the way.
Before you close the door, be sure the belt is out
of the way. If you slam the door on it, you can
damage both the belt and your vehicle.
Shoulder Belt Height Adjustment
Before you begin to drive, move the shoulder belt
height adjuster to the height that is right for you.
Adjust the height so that the shoulder portion
of the belt is centered on your shoulder. The belt
should be away from your face and neck, but
not falling off your shoulder. Improper shoulder belt
height adjustment could reduce the effectiveness
of the safety belt in a crash.
To move it down,
pull on the center
adjuster control
labeled PULL.
You can move the
height adjuster up
just by pushing up
on the shoulder
belt guide.
After you move the height adjuster to where you
want it, try to move it down without pushing in
to make sure it has locked into position.
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