Pontiac 1993 Grand Am Owner's Manual page 26

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The lap part of the belt should be worn
low and snug on the hips, just touching
the thighs, In
a
crash, this applies force
to the strong pelvic bones. And you'd be
less likely to slide under the lap belt. If
you slid under it, the belt would apply
force at your abdomen. This could cause
serious or even fatal injuries. The
shoulder belt should go over the
shoulder and across the chest. These
parts of the body are best able to take
belt restraining forces.
The safety belt locks if there's a sudden
stop or a crash.
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You can be seriously hurt if
your shoulder belt
is too
loose. In a crash you would move
forward too much, which could
increase injury. The shoulder belt
should fit against your body.
To unlatch the belt, just push the button
on the buckle.
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