Oldsmobile 1995 88 Owner's Manual page 19

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 crash.
Shoulder Belt Height Adjuster
Before you begin to drive, move the shoulder belt
adiuster to the height that is right fop you.
To move it down, squeeze the release handle and move
the height adjuster to the desired position. You can move
the adjuster up just by pushing up on the bottom of the
release handle. After you move the adjuster to where
you want it, try to move
it
down without squeezing the
release handle to make sure it has locked into position.
Adjust the height so that the shoulder portion of the belt
is centered on your shoulder. The belt should be away
from your face and neck, but not falling off your
shoulder.
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