Chevrolet 2003 Silverado 1500 Pickup Owner's Manual page 42

People should never hold a baby
in
their arms
while riding in a vehicle. A baby doesn't weigh
much
--
until a crash. During a crash a baby will
become so heavy it is not possible to hold it.
CAUTION: (Continued)
For example, in a crash at only 25 mph
(40 km/h), a 12-lb. (5.5 kg) baby will suddenly
become a 240-lb. (1 10 kg) force on a person's
arms. A baby should be secured in an
appropriate restraint.
I
1-35