Chevrolet 2011 Impala Owner's Manual page 100

3-52 Seats and Restraints
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).
Top Tether Anchor
A top tether (A, C) anchors the
top of the child restraint to the
vehicle. A top tether anchor is
built into the vehicle. The top tether
attachment (B) on the child restraint
connects to the top tether anchor
in the vehicle in order to reduce the
forward movement and rotation of
the child restraint during driving or
in a crash.
Your child restraint may have
a single tether (A) or a dual
tether (C). Either will have a
single attachment (B) to secure
the top tether to the anchor.
Some child restraints that have
a top tether are designed for use
with or without the top tether being
attached. Others require the top
tether always to be attached.
In Canada, the law requires that
forward-facing child restraints have
a top tether, and that the tether
be attached. Be sure to read and
follow the instructions for your child
restraint.