GMC Sierra 2018 Owner's Manual page 100

Crew and Double Cab Rear Seat
: Seating positions with
top tether anchors.
: Seating positions with two lower
anchors.
To assist in locating the lower
anchors on crew cab models, each
seating position with lower anchors
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 (With
the Seat Belt in the Center Front
Seat) 0 111 or Securing Child
Restraints (With the Seat Belt in the
Front Passenger Seat) 0 112 or
Securing Child Restraints (With the
Seat Belt in the Rear Seat) 0 108
for more information.
Seats and Restraints
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.
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