2020 GMC SIERRA ECU

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 4/4/19
Seats and Restraints 95
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 Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 4/4/19
96 Seats and Restraints
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 (In the
Center Front Seat) 0108 or
Securing Child Restraints (With the
Seat Belt in the Rear Seat) 0105 or
Securing Child Restraints (With the
Seat Belt in the Front Outboard
Seat) 0109 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 (In the
Center Front Seat)
0108 or
Securing Child Restraints (With the
Seat Belt in the Rear Seat) 0105 or
Securing Child Restraints (With the
Seat Belt in the Front Outboard
Seat) 0109 for more information.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 4/4/19
98 Seats and Restraints
Passenger Side Loop (Double andCrew 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.
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 091 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. 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
(Continued)

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 4/4/19
Seats and Restraints 99
Warning (Continued)
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.
Caution
Do not let the LATCH
attachments rub against the
vehicle’s seat belts. This may(Continued)
Caution (Continued)
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 091.
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 (In
the Center Front Seat) 0108 or Securing Child Restraints (With
the Seat Belt in the Rear Seat)
0
105 or
Securing Child Restraints (With
the Seat Belt in the Front
Outboard Seat) 0109.
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:

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 4/4/19
100 Seats and Restraints
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 restraintand 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 (In the Center
Front Seat) 0108 or
Securing Child Restraints (With
the Seat Belt in the Rear Seat)
0 105 or
Securing Child Restraints (With
the Seat Belt in the Front
Outboard Seat) 0109.
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.
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, if your vehicle has one.
Follow the child restraint
instructions and the vehicle

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 4/4/19
102 Seats and Restraints
2.1.5. Make sure thechild restraint top
tether hook is
completely closed
and secured to the
top tether anchor.
Rear Passenger Side Position
Rear Passenger Side Position
2.2. 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.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 4/4/19
Seats and Restraints 103
Rear Center Position
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.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 4/4/19
104 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 headrestraint 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.
{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.