Oldsmobile 2003 Silhouette Owner's Manual page 45

When you sit in the center position of the bench seat,
you have a lap safety belt, which has no retractor.
To make the belt longer, tilt the latch plate and pull it
along the belt.
TO make the belt shorter, pull its free end as shown
until the belt is snug.
Buckle, position and release it the same way as the
lap part of a lap-shoulder belt. If the belt isn't long
enough, see Safety Belt Extender on
page
7-44.
Make sure the release button on the buckle is positioned
so you would be able to unbuckle the safety belt
quickly if you ever had to.
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