GMC Yukon Denali 2015 Owner's Manual page 116

If the position you are using
has an adjustable head
restraint and you are using
a single tether, raise the
head restraint and route the
tether under the head
restraint and in between the
head restraint posts.
If the position you are using
has a fixed head restraint
and you are using a single
tether, route the tether
around the inboard or
outboard side of the head
restraint.
If the position you are using
has a fixed or an adjustable
head restraint and you are
using a dual tether, route
the tether around the head
restraint.
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.
Seats and Restraints
Head Restraint Removal and
Reinstallation
1. Partially fold the seatback
forward. See Third Row Seats
on page 3-14 for additional
information.
2. Press the buttons on the head
restraint posts and pull up on the
head restraint.
3. When the child restraint is
removed, reinstall the head
restraint before the seating
position is used.
3-53