GMC SIERRA 2021 Manual Online

GMC Sierra/Sierra Denali 1500 Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-14632426) - 2021 - CRC - 11/5/20
80 Seats and Restraints
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).
Top Tether Anchor
A top tether (3, 4) is used to secure the top
of the child restraint to the vehicle. A top
tether anchor is built into the vehicle. The
top tether attachment hook (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 hook (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
—Bucket Seat Only

GMC Sierra/Sierra Denali 1500 Owner Manual (GMNA-Localizing-U.S./
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Seats and Restraints 81
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) 092 or
Securing Child Restraints (With the Seat Belt
in the Rear Seat) 088 or
Securing Child Restraints (With the Seat Belt
in the Front Passenger Seat) 092 for more
information.
Double and Crew Cab Rear Seat
I: Seating positions with top tether
anchors.
H: Seating positions with two lower
anchors.
To assist in locating the lower anchors on
double and crew cab models, each seating
position with lower anchors has two labels
near the crease between the seatback and
the seat cushion.
For regular cab models, there are top tether
anchor symbols 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) 092 or
Securing Child Restraints (With the Seat Belt
in the Rear Seat) 088 or
Securing Child Restraints (With the Seat Belt
in the Front Passenger Seat) 092 for more
information.

GMC Sierra/Sierra Denali 1500 Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-14632426) - 2021 - CRC - 11/5/20
82 Seats and Restraints
Regular Cab
For regular cab models, the top tether
anchors are on the back panel behind the
passenger seat(s) or center seat. Be sure to
use an anchor directly behind the seating
position where the child restraint will be
placed.Driver Side Anchor and Loop (Double and Crew Cab)
Center Anchor and Loop (Double andCrew Cab)
Passenger Side Loop (Double and Crew Cab)
For double and crew cab models, the top
tether is routed through loops (2) to the top
tether anchors (1). Be sure to use the correct
anchor for 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 and anchors.
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.

GMC Sierra/Sierra Denali 1500 Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-14632426) - 2021 - CRC - 11/5/20
Seats and Restraints 83
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.
SeeWhere to Put the Restraint 076 for
additional information.
Securing a Child Restraint Designed for
the LATCH System
{Warning
A child could be seriously injured or killed
in a crash if the child restraint is not
properly attached to the vehicle using
either the LATCH anchors or the vehicle
seat belt. Follow the instructions that
came with the child restraint and the
instructions in this manual.
{Warning
Do not attach more than one child
restraint to a single anchor, except for
the center top tether anchors in the crew
cab models. 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.
(Continued)
Warning (Continued)
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.
{Warning
Children 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(Continued)
Warning (Continued)
tighten the belt behind the child restraint
after the child restraint has been
installed.
Caution
Do 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 seat cushion 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 076.

GMC Sierra/Sierra Denali 1500 Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-14632426) - 2021 - CRC - 11/5/20
84 Seats and Restraints
Regular Cab Models1. 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) 092 or
Securing Child Restraints (With the Seat
Belt in the Rear Seat) 088 or
Securing Child Restraints (With the Seat
Belt in the Front Passenger Seat) 092.
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:
1.1. Find the top tether anchor.
1.2. 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. Make sure the child restraint top tether
hook is completely closed and secured to
the top tether anchor.
3. 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 92 or
Securing Child Restraints (With the Seat
Belt in the Rear Seat) 088 or
Securing Child Restraints (With the Seat
Belt in the Front Passenger Seat) 092.
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 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.
Double and 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 seat belt. Refer to the
child restraint manufacturer instructions
and the instructions in this manual.

GMC Sierra/Sierra Denali 1500 Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-14632426) - 2021 - CRC - 11/5/20
Seats and Restraints 85
1.1. Find the lower anchors for thedesired 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, if your vehicle has one.
Follow the child restraint instructions and
the vehicle LATCH anchor weight limits
described at the beginning of this
section, and the following steps:
Rear Driver Side Position
Rear Driver Side Position
2.1. For a top tether in the rear driver side position:
2.1.1. Remove the driver side head restraint and center
headrest. See “Head
Restraint or Headrest
Removal and Reinstallation”
later in this section.2.1.2. For first time use, remove and discard the rubber band
from the top tether loop (2).
2.1.3. Route the top tether (3) through the loop (2).
2.1.4. Attach the top tether (3) to the driver side of the center
top tether metal anchor (1).
2.1.5. Make sure the child restraint top tether hook is
completely closed and
secured to the top tether
anchor.

GMC Sierra/Sierra Denali 1500 Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-14632426) - 2021 - CRC - 11/5/20
86 Seats and Restraints
Rear Passenger Side Position
Rear Passenger Side Position2.2. For a top tether in the rear
passenger side position:
2.2.1. Remove the passenger side head restraint and center
headrest. See “Head
Restraint or Headrest
Removal and Reinstallation”
later in this section.
2.2.2. Route the top tether (3) through the loop (2).
2.2.3. Attach the top tether (3) to the passenger side of the
center top tether metal
anchor (1).
2.2.4. Make sure the child restraint top tether hook is
completely closed and
secured to the top tether
anchor.
Rear Center Position
Rear Center Position

GMC Sierra/Sierra Denali 1500 Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-14632426) - 2021 - CRC - 11/5/20
Seats and Restraints 87
2.3. For a top tether in the rear centerposition:
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.
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.
3. When the child restraint is removed, reinstall the head restraint or headrest
before the seating position is used.

GMC Sierra/Sierra Denali 1500 Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-14632426) - 2021 - CRC - 11/5/20
88 Seats and Restraints
{Warning
With head restraints that are not
installed and adjusted properly, there is a
greater chance that occupants will suffer
a neck/spinal injury in a crash. Do not
drive until the head restraints for all
occupants are installed and adjusted
properly.
To reinstall the head restraint or headrest:
1. Insert the head restraint or headrest posts into the holes in the top of the
seatback. The notches on the posts must
face the driver side of the vehicle. 2. Push the head restraint or
headrest down.
3. Try to move the head restraint or headrest to make sure that it is locked in
place.
Replacing LATCH System Parts
After a Crash
{Warning
A crash can damage the LATCH system in
the vehicle. A damaged LATCH system
may not properly secure the child
restraint, resulting in serious injury or
even death in a crash. To help make sure
the LATCH system is working properly
after a crash, see your dealer to have the
system inspected and any necessary
replacements made as soon as possible.
If the vehicle has the LATCH system and it
was being used during a crash, new LATCH
system parts may be needed.
New parts and repairs may be necessary
even if the LATCH system was not being
used at the time of the crash.
Securing Child Restraints (With
the Seat Belt in the Rear Seat)
When securing a child restraint with the
seat belts in a rear seat position, study the
instructions that came with the child
restraint to make sure it is compatible with
this vehicle.
If the child restraint has the LATCH system,
see Lower Anchors and Tethers for Children
(LATCH System) 077 for how and where to
install the child restraint using LATCH. If a
child restraint is secured in the vehicle using
a seat belt and it uses a top tether, see
Lower Anchors and Tethers for Children
(LATCH System) 077 for top tether anchor
locations.
Do not secure a child seat in a position
without a top tether anchor if a national or
local law requires that the top tether be
anchored, or if the instructions that come
with the child restraint say that the top
tether must be anchored.
In Canada, the law requires that
forward-facing child restraints have a top
tether, and that the tether be attached.

GMC Sierra/Sierra Denali 1500 Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-14632426) - 2021 - CRC - 11/5/20
Seats and Restraints 89
If the child restraint or vehicle seat position
does not have the LATCH system, you will
be using the seat belt to secure the child
restraint. Be sure to follow the instructions
that came with the child restraint.
If more than one child restraint needs to be
installed in the rear seat, be sure to read
Where to Put the Restraint076.
Double Cab
1. Remove the head restraint or headrest
prior to installing a forward-facing child
restraint in an outboard rear seating
position. See “Head Restraint or Headrest
Removal and Reinstallation” underLower
Anchors and Tethers for Children (LATCH
System) 077.
2. Put the child restraint on the seat.
3. Pick up the latch plate, and run the lap and shoulder portions of the vehicle seat
belt through or around the child
restraint. The child restraint instructions
will show you how.
4. Push the latch plate into the buckle untilit clicks.
Position the release button on the
buckle, away from the child restraint, so
that the seat belt could be quickly
unbuckled if necessary.5. Pull the shoulder belt all the way out ofthe retractor to set the lock. When the
retractor lock is set, the belt can be
tightened but not pulled out of the
retractor.