GMC 2000 Sonoma Owner's Manual page 50

An infant car bed (A) is a special bed made for use
in a motor vehicle. It's an infant restraint system
designed to restrain or position a child on a
continuous flat surface. With an infant car bed,
make sure that the infant's head rests toward the
center of the vehicle.
-
A rear facing infant restraint (B) positions an infant
to face the rear of the vehicle. Rear
restraints are designed for infants of up to about
20 lbs. (9 kg) and about one year of age. This type
of restraint faces the rear so that the infant's head,
neck and body can have the support they need in
a frontal crash. Some infant seats come in two
--
parts the base stays secured in the vehicle and
the seat part is removable.
-
facing infant
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