Chevrolet 1994 Astro Passenger Owner's Manual page 44

3. To make the lap
part tight, pull
down on the
buckle end of the
belt as you pull
up on the
shoulder part.
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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