GMC Sierra 2014 Owner's Manual page 108

3-48 Seats and Restraints
has two labels near the crease
between the seatback and the seat
cushion.
For double cab models, the rear
outboard seating positions have
exposed metal lower anchors in the
crease between the seatback and
the seat cushion.
For regular cab models, there is an
anchor symbol on the cover to
assist you in locating the top tether
anchors.
Do not install a child restraint in the
center seating position. See
Securing Child Restraints (Center
Front Seat) on page 3-57 or
Securing Child Restraints (Front
Outboard Passenger Seat) on
page 3-57 or Securing Child
Restraints (Rear Seat) on page 3-66
for more information.
Regular Cab
For regular cab models, the top
tether anchors are under covers on
the back panel behind the
passenger seat. Remove the trim
plug to access the anchor. Be sure
to use an anchor on the same side
of the vehicle as the seating
position where the child restraint
will be placed.
Crew Cab Shown, Double Cab
Similar
For crew and double cab models,
the top tether anchors are the loops
near the top of the seatback for
each rear seating position. These
loops will be used to route the top
tether through, as well as, to secure
the top tether to the vehicle. Be sure
to use the anchor (loop) on the
same side of the vehicle as the
seating position where the child
restraint will be placed.