Chevrolet 1998 Cavalier Owner's Manual page 33

I
If the belt stops before it reaches the buckle, tilt
the latch plate and keep pulling until you can buckle
the belt.
Pull up on the latch plate to make sure it is secure.
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.
5. To make the lap part tight, pull down on the buckle
end of the belt
as
you pull up on the shoulder belt.
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