Chevrolet 2007 Silverado 1500 Pickup Owner's Manual page 58

In order to use the LATCH system in your vehicle,
you need a child restraint that has LATCH
attachments. The child restraint manufacturer will
provide you with instructions on how to use
the child restraint and its attachments. The
following explains how to attach a child restraint
with these attachments in your vehicle.
Not all vehicle seating positions or child restraints
have lower anchors and attachments or top
tether anchors and attachments.
58
Lower Anchors
Lower anchors (A) are metal bars built into the
vehicle. There are two lower anchors for each
LATCH seating position that will accommodate a
child restraint with lower attachments (B).