Cadillac 2005 CTS Owner's Manual page 39

For most basic types of child restraints, there are
many different models available. When purchasing
a child restraint, be sure it is designed to be
used in a motor vehicle. If it is, the restraint will
have a label saying that it meets federal motor
vehicle safety standards.
The restraint manufacturer's instructions that come
with the restraint state the weight and height
limitations for a particular child restraint. In addition,
there are many kinds of restraints available for
children with special needs.
{
CAUTION:
Newborn infants need complete support,
including support for the head and neck.
This is necessary because a newborn infant's
neck is weak and its head weighs so much
compared with the rest of its body. In a
crash, an infant in a rear-facing seat settles
into the restraint, so the crash forces can be
distributed across the strongest part of an
infant's body, the back and shoulders. Infants
always should be secured in appropriate
infant restraints.
{
CAUTION:
The body structure of a young child is quite
unlike that of an adult or older child, for whom
the safety belts are designed. A young child's
hip bones are still so small that the vehicle's
regular safety belt may not remain low on the
hip bones, as it should. Instead, it may settle
up around the child's abdomen. In a crash,
the belt would apply force on a body area that
is unprotected by any bony structure. This
alone could cause serious or fatal injuries.
Young children always should be secured in
appropriate child restraints.
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