Shoulder Belt Height Adjuster - GMC 2008 Savana Van Owner's Manual

To unlatch the belt, push the button on the buckle.
The belt should go back out of the way. When the
safety belt is not in use, slide the latch plate up
the safety belt webbing. The latch plate should rest
on the stitching on the safety belt, near the guide
loop on the side wall.
Before you close a 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.
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Shoulder Belt Height Adjuster

Your vehicle has a shoulder belt height adjuster for
the driver and right front passenger position.
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.
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.
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.