Chevrolet impala 2002 User Manual

If your vehicle has a front bench seat, someone can sit in
the center position.

When you sit in the center front seating position, 
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

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shoulder belt. If the belt isn’t long enough,

see “Safety Belt Extender” at the end of this section.

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.