GMC 2004 Savana Van Owner's Manual page 46

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
muchcompared 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 restrained in appropriate
infant restraints. However, infants, who should
be restrained in a rear-facing child restraint,
cannot ride safely in this vehicle.
1-40
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's
unprotected by any bony structure. This alone
could cause serious or fatal injuries. Young
children always should be secured in
appropriate child restraints.