Chevrolet 2004 Blazer Owner's Manual page 50

Lower Anchorages and Top Tethers
for Children (LATCH System)
If your vehicle is equipped with the LATCH System, it is
available in the second row outboard seating positions.
This system, designed to make installation of child
restraints easier, does not use the vehicle's safety belts.
Instead, it uses vehicle anchors (A, B) and child
restraint attachments to secure the restraints. Some
restraints also use another vehicle anchor to secure a
top tether strap (C).
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