Child Restraint Systems - GMC Sierra 2010 Owner's Manual

Child Restraint Systems

The harness system holds the infant in place and, in a
crash, acts to keep the infant positioned in the restraint.
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A rear-facing infant
seat (A) provides restraint
with the seating surface
against the back of the
infant.
A forward-facing child
seat (B) provides restraint
for the child's body with
the harness.
A booster seat (C-D) is a child restraint designed to
improve the fit of the vehicle's safety belt system.
A booster seat can also help a child to see out the
window.