Pontiac 1993 Sunbird Owner's Manual page 38

Q: What if a child is wearing a lap-
shoulder belt, but the child is so
small that the shoulder belt is very
close to the child's face or neck?
A:
Move the child toward the center of
the vehicle, but be sure that the
shoulder belt still is on the child's
shoulder, so that in a crash the
child's upper body would have the
restraint that belts provide. If the
child is so small that the shoulder
belt is still very close to the child's
face or neck, you might want to
place the child in the center seat
position, the one that has only a lap
belt. See Rear Seat Comfort Guides
in the Index.
Wherever the child sits, the lap portion
of the belt should be worn low and snug
on the hips, just touching the child's
thighs. This applies belt force to the
child's pelvic bones in a crash.