GMC SIERRA DENALI 2018 Owners Manual

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
100 Seats and Restraints Booster seats use the vehicle ’ s seat
belts to secure the child in the
booster seat. If the manufacturer
recommends that the booster seat
be secured with the LATCH system,
this can be done as long as the
booster seat can be positioned
properly and there is no interference
with the proper positioning of the
lap-shoulder belt on the child.
Make sure to follow the instructions
that came with the child restraint,
and also the instructions in this
manual.
When installing a child restraint with
a top tether, you must also use
either the lower anchors or the seat
belts to properly secure the child
restraint. A child restraint must
never be attached using only the top
tether.
The LATCH anchorage system can
be used until the combined weight
of the child plus the child restraint is
29.5 kg (65 lbs). Use the seat belt
alone instead of the LATCH
anchorage system once the
combined weight is more than
29.5 kg (65 lbs). See Securing Child Restraints (With
the Seat Belt in the Center Front
Seat) 0 114 or Securing Child
Restraints (With the Seat Belt in the
Front Passenger Seat) 0 115 or
Securing Child Restraints (With the
Seat Belt in the Rear Seat) 0 111 .
Child restraints built after March
2014 will be labeled with the
specific child weight up to which the
LATCH system can be used to
install the restraint.
The following explains how to attach
a child restraint with these
attachments in the vehicle.
Not all vehicle seating positions or
child restraints have lower anchors
and attachments or top tether
anchors and attachments. In this
case, the seat belt must be used
(with top tether where available) to
secure the child restraint.
See Securing Child Restraints (With
the Seat Belt in the Center Front
Seat) 0 114 or Securing Child
Restraints (With the Seat Belt in the
Front Passenger Seat) 0 115 or
Securing Child Restraints (With the
Seat Belt in the Rear Seat) 0 111 .Lower Anchors
Lower anchors (1) are metal bars
built into the vehicle. There are two
lower anchors for each LATCH
seating position that will
accommodate a child restraint with
lower attachments (2).

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
Seats and Restraints 101Top Tether Anchor
A top tether (3, 4) anchors the top of
the child restraint to the vehicle.
A top tether anchor is built into the
vehicle. The top tether
attachment (2) on the child restraint
connects to the top tether anchor in
the vehicle in order to reduce the
forward movement and rotation of
the child restraint during driving or in
a crash.
The child restraint may have a
single tether (3) or a dual tether (4).
Either will have a single
attachment (2) to secure the top
tether to the anchor. Some child restraints that have a
top tether are designed for use with
or without the top tether being
attached. Others require the top
tether always to be attached. In
Canada, the law requires that
forward-facing child restraints have
a top tether, and that the tether be
attached. Be sure to read and follow
the instructions for your child
restraint.
Lower Anchor and Top Tether
Anchor Locations
Regular Cab — Two-Passenger
Front Seat Regular Cab — Three-Passenger
Front Seat
i : Seating positions with
top tether anchors.
Do not install a child restraint in the
center front seating position.
See Securing Child Restraints (With
the Seat Belt in the Center Front
Seat) 0 114 or Securing Child
Restraints (With the Seat Belt in the
Front Passenger Seat) 0 115 or
Securing Child Restraints (With the
Seat Belt in the Rear Seat) 0 111 for
more information.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
102 Seats and Restraints
Crew and Double Cab Rear Seat
i : Seating positions with
top tether anchors.
j : 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)
0 114 or Securing Child Restraints
(With the Seat Belt in the Front
Passenger Seat) 0 115 or Securing
Child Restraints (With the Seat Belt
in the Rear Seat) 0 111 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.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
Seats and Restraints 103
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.
Be sure to read the following
instructions to properly install a child
restraint using these loops. Do not secure a child restraint in a
position without a top tether anchor
if a national or local law requires
that the top tether be attached, or if
the instructions that come with the
child restraint say that the top tether
must be attached.
According to accident statistics,
children and infants are safer when
properly restrained in a child
restraint system or infant restraint
system secured in a rear seating
position. See Where to Put the
Restraint 0 98 for additional
information.
Securing a Child Restraint
Designed for the LATCH
System
{ Warning
If a LATCH-type child restraint is
not attached to anchors, the child
restraint will not be able to protect
the child correctly. In a crash, the
child could be seriously injured or
killed. Install a LATCH-type child
(Continued) Warning (Continued) restraint properly using the
anchors, or use the vehicle's seat
belts to secure the restraint,
following the instructions that
came with the child restraint and
the instructions in this manual.
{ WarningDo not attach more than one child
restraint to a single anchor,
except for the center top tether
anchors in the crew and double
cabs. Attaching more than one
child restraint to a single anchor
could cause the anchor or
attachment to come loose or even
break during a crash. A child or
others could be injured. To reduce
the risk of serious or fatal injuries
during a crash, attach only one
child restraint per anchor.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
104 Seats and Restraints
{ WarningChildren can be seriously injured
or strangled if a shoulder belt is
wrapped around their neck. The
shoulder belt can tighten but
cannot be loosened if it is locked.
The shoulder belt locks when it is
pulled all the way out of the
retractor. It unlocks when the
shoulder belt is allowed to go all
the way back into the retractor,
but it cannot do this if it is
wrapped around a child ’ s neck.
If the shoulder belt is locked and
tightened around a child ’ s neck,
the only way to loosen the belt is
to cut it.
Buckle any unused seat belts
behind the child restraint so
children cannot reach them. Pull
the shoulder belt all the way out
of the retractor to set the lock,
and tighten the belt behind the
child restraint after the child
restraint has been installed. CautionDo not let the LATCH
attachments rub against the
vehicle ’ s seat belts. This may
damage these parts. If necessary,
move buckled seat belts to avoid
rubbing the LATCH attachments.
Do not fold the rear seatback
when the seat is occupied. Do not
fold the empty rear seat with a
seat belt buckled. This could
damage the seat belt or the seat.
Unbuckle and return the seat belt
to its stowed position, before
folding the seat.
If you need to secure more than one
child restraint in the rear seat, see
Where to Put the Restraint 0 98 .
This system is designed to make
installation of child restraints easier.
When using lower anchors, do not
use the vehicle's belts. Instead use
the vehicle's anchors and child
restraint attachments to secure the restraints. Some restraints also use
another vehicle anchor to secure a
top tether.
Regular Cab Models
1. For models without a rear seat,
forward-facing child restraints
should only be installed in the
right front seating position with
belts and a top tether. See
Securing Child Restraints (With
the Seat Belt in the Center
Front Seat) 0 114 or Securing
Child Restraints (With the Seat
Belt in the Front Passenger
Seat) 0 115 or Securing Child
Restraints (With the Seat Belt
in the Rear Seat) 0 111 .
If the child restraint
manufacturer recommends that
the top tether be attached,
attach and tighten the top
tether to the top tether anchor,
if your vehicle has one. Refer
to the child restraint
instructions and the following
steps:

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
Seats and Restraints 1051.1. Fold the passenger
seatback forward to
access the top tether
anchor. See Reclining
Seatbacks 0 61 .
1.2. Find the top tether
anchor.
1.3. Remove the cover to
expose the anchor.
1.4. Route, attach, and tighten
the top tether according
to your child restraint
instructions and the
following instructions: If the position you are
using has an adjustable
head restraint and you
are using a dual tether,
route the tether around
the head restraint.
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. 2. Secure the child restraint in the
right front seating position with
the vehicle belts. See Securing
Child Restraints (With the Seat
Belt in the Center Front Seat)
0 114 or Securing Child
Restraints (With the Seat Belt
in the Front Passenger Seat)
0 115 or Securing Child
Restraints (With the Seat Belt
in the Rear Seat) 0 111 .
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 belt 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.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
106 Seats and Restraints Crew Cab Models
1. Attach and tighten the lower
attachments to the lower
anchors. If the child restraint
does not have lower
attachments or the desired
seating position does not have
lower anchors, secure the child
restraint with the top tether and
the belts. Refer to your child
restraint manufacturer ’ s
instructions and the
instructions in this manual.
1.1. Find the lower anchors
for the desired seating
position.
1.2. Put the child restraint on
the seat.
1.3. Attach and tighten the
lower attachments on the
child restraint to the lower
anchors. 2. For forward-facing child
restraints, attach and tighten
the top tether to the top tether
anchor (loop), if your vehicle
has one. Follow the child
restraint instructions the
vehicle LATCH anchor weight
limits described at the
beginning of this section, and
the following steps:
Example — Rear Driver Side
Position Example — Rear Driver Side
Position
2.1. For a top tether in the
rear driver side position:
2.1.1. Raise the
headrest.
2.1.2. Route the top
tether (4) between
the headrest
posts, through the
loop (3), behind
the inboard
headrest post, and
under the center
shoulder belt (2).

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
Seats and Restraints 1072.1.3. Then attach the
top tether (4) to
the top tether
anchor (loop) (1) at
the center rear
seating position.
2.2. For a top tether in the
rear center position:
2.2.1. Route the top
tether (4) through
the center loop (1),
and behind the
passenger side
headrest post.
2.2.2. Then attach the
top tether (4) to
the top tether
anchor (loop) at
the rear passenger
side seating
position. 2.3. For a top tether in the
rear passenger position:
2.3.1. Raise the
headrest.
2.3.2. Route the top
tether (4) between
the headrest
posts, through the
loop on the
passenger side
and behind the
inboard
headrest post.
2.3.3. Then attach the
top tether (4) to
the top tether
anchor (loop) (1) at
the center rear
seating position.
3. Tighten the top tether per the
child restraint manufacturer's
instructions. When the top tether is properly
tightened, the anchor (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 loop. 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.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
108 Seats and Restraints Double Cab Models
1. Remove the headrest prior to
installing a forward-facing child
restraint in an outboard rear
seating position. See “ Headrest
Removal and Reinstallation ” at
the end of this section.
2. Attach and tighten the lower
attachments to the lower
anchors. If the child restraint
does not have lower
attachments or the desired
seating position does not have
lower anchors, secure the child
restraint with the top tether and
the belts. Refer to your child
restraint manufacturer ’ s
instructions and the
instructions in this manual.
2.1. Find the lower anchors
for the desired seating
position.
2.2. Put the child restraint on
the seat.
2.3. Attach and tighten the
lower attachments on the
child restraint to the lower
anchors. 3. For forward-facing child
restraints, attach and tighten
the top tether to the top tether
anchor (loop). Follow the child
restraint instructions, the
vehicle LATCH anchor weight
limits described at the
beginning of this section, and
the following steps:
Example — Rear Driver Side
Position Example — Rear Driver Side
Position
3.1. For a top tether in the
rear driver side position:
3.1.1. Remove the
headrest.
3.1.2. Route the top
tether (4) through
the loop (3) on the
driver side under
the center
shoulder belt (2).

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
Seats and Restraints 1093.1.3. Then attach the
top tether (4) to
the top tether
anchor (loop) (1) at
the center rear
seating position.
3.2. For a top tether in the
rear center position:
3.2.1. Route the top
tether (4) through
the center loop (1),
and behind the
passenger side
headrest post.
3.2.2. Then attach the
top tether (4) to
the top tether
anchor (loop) at
the rear passenger
side seating
position.
3.3. For a top tether in the
rear passenger position:
3.3.1. Remove the
headrest. 3.3.2. Route the top
tether (4) through
the loop on the
passenger side.
3.3.3. Then attach the
top tether (4) to
the top tether
anchor (loop) (1) at
the center rear
seating position.
4. Tighten the top tether per the
child restraint manufacturer's
instructions.
When the top tether is properly
tightened, the anchor (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 loop. Top tethers
can be attached for child
restraints in all three rear
seating positions at the same
time, following the routing
instructions above. 5. 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.
Headrest Removal and
Reinstallation Crew Cab Models
For outboard rear seating positions,
if the child restraint cannot be
installed properly with the headrest
in place, the headrest may be
removed. See your dealer for
assistance with removal.
Store the removed headrests in a
secure place. Reinstall the headrest
before the seating position is
moved.