Pontiac 1998 Grand Am Owner's Manual page 48

A booster seat (F, G ) is designed for children who
are about 40 to 60 lbs. (18 to 27 kg) and about four
to eight years of age. It's designed to improve the
fit of the vehicle's safety belt system. Booster seats
with shields use lap-only belts; however, booster
seats without shields use lap-shoulder belts.
Booster seats can also help a child to see
out
the window.
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