GMC Sierra Denali 1500 2023 Owner's Manual page 90

Rear Center Position
2.3. For a top tether in the rear center
position:
2.3.1. Remove the driver side head
restraint and center
headrest. See Head
Restraint or Headrest
Removal and Reinstallation
later in this section.
2.3.2. Route the top tether (1)
through the center loop (2).
2.3.3. Attach the top tether (1) to
the driver side top tether
metal anchor (3).
2.3.4. Make sure the child restraint
top tether hook is
completely closed and
secured to the top tether
anchor.
3. Tighten the top tether per the child
restraint manufacturer's instructions.
When the top tether is properly
tightened, the loop may bend. This is
normal and will not damage the vehicle.
If child restraints are installed in both
outboard positions, both top tethers can
be attached to the center anchor. Top
tethers can be attached for child
restraints in all three rear seating
positions at the same time, following the
routing instructions above.
4. 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 or Headrest Removal and
Reinstallation
The second row outboard head restraints or
center headrest can be removed if they
interfere with the proper installation of the
child restraint.
To remove the second row head restraints
or center headrest:
1. Press both buttons on the head restraint
or headrest posts at the same time, and
pull up on the head restraint or
headrest.
2. Store the head restraint or headrest in a
secure place.
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