Chevrolet Impala 2013 Owner's Manual page 88

3-44 Seats and Restraints
If the position you are using
has a fixed headrest and
you are using a single
tether, route the tether over
the head restraint.
If the position you are using
has a fixed headrest and
you are using a dual tether,
route the tether around the
head restraint.
If you are using a single
tether in the center seating
position without a headrest,
route the single tether over
the seatback.
I n f o r ma t i o n P r o v i d e d b y :
If you are using a dual
tether in the center seating
position without a headrest,
route the dual tether over
the seatback.
3. Before placing a child in the
child restraint, make sure it is
securely held in place. To check,
grasp the child restraint at the
LATCH path and attempt to
move it side to side and back
and forth. There should be no
more than 2.5 cm (1 in) of
movement, for proper
installation.