2021 GMC CANYON ECU

GMC Canyon/Canyon Denali Owner Manual (GMNA-Localizing-U.S./Canada-
14430430) - 2021 - CRC - 9/9/20
58 Seats and Restraints
If the position you are using does
not have a head restraint and you
are using a dual tether, route the
tether over the seatback.
If the position you are using has a
fixed head restraint and you are
using a dual tether, route the
tether around the sides of the head
restraint.
3.4. Adjust the top tether to its fulllength and attach the top tether
hook to the anchor. Make sure that
you secure the top tether to the
top tether anchor and not to the
seatback latch.
3.5. Push rearward on the seatback until it locks into its upright position.
Push and pull on the seatback to
make sure it is secured properly.
4. 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 seat
belt and the top tether. Refer to your child restraint manufacturer instructions
and
Securing Child Restraints (With the
Seat Belt in the Rear Seat) 064 or
Securing Child Restraints (With the Seat
Belt in the Front Seat) 069.
5. Tighten the top tether.
6. 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.
Extended Cab with Rear Seats
{Warning
Never secure a rear-facing or
forward-facing child restraint in the left
rear seating position in an extended cab
model. This seating position is not
suitable for child restraint installation.
The seat cushion is too short to properly
support a rear-facing or forward-facing
child restraint. A child could be seriously
injured or killed in a sudden stop or
crash.
(Continued)

GMC Canyon/Canyon Denali Owner Manual (GMNA-Localizing-U.S./Canada-
14430430) - 2021 - CRC - 9/9/20
60 Seats and Restraints
2. Press the button for the passenger sideheadrest at the top of the seatback and
pull up.
3. Insert the headrest posts into the holeson the front of the passenger side seat
cushion to install the seat cushion
extension. The notches on the posts
should face the passenger side of the
vehicle. Try to move the headrest to
make sure it is locked in place.
4. If the child restraint manufacturer recommends that the top tether be
attached, adjust the top tether to its full
length and attach the top tether hook to
the anchor. Refer to the child restraint
instructions and the following:
Route the top tether (1) through the
loop (2) at the top of the seatback
directly behind the child restraint and attach the top tether hook to the top
tether loop at the top of the seatback
for the opposite rear seating position (3).
5. Attach and tighten the lower attachments to the lower anchors. If the
child restraint does not have lower
attachments, secure the child restraint
with the seat belt and the top tether (if
appropriate). See Securing Child
Restraints (With the Seat Belt in the Rear
Seat) 064 or
Securing Child Restraints (With the Seat
Belt in the Front Seat) 069.
6. Tighten the top tether. The child restraint instructions will show you how.
7. 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.
8. Always reinstall the headrest before the seating position is used by another
occupant. See “Head Restraint/Headrest
Removal and Reinstallation” at the end
of this section.

GMC Canyon/Canyon Denali Owner Manual (GMNA-Localizing-U.S./Canada-
14430430) - 2021 - CRC - 9/9/20
Seats and Restraints 61
Extended Cab without Rear Seats
{Warning
A child in a rear-facing child restraint can
be seriously injured or killed if the right
front passenger airbag inflates. This is
because the back of the rear-facing child
restraint would be very close to the
inflating airbag. A child in a
forward-facing child restraint can be
seriously injured or killed if the right
front passenger airbag inflates and the
passenger seat is in a forward position.
Even if the passenger sensing system has
turned off the right front passenger
frontal airbag, no system is fail-safe. No
one can guarantee that an airbag will not
deploy under some unusual circumstance,
even though it is turned off.
Since this vehicle does not have a rear
seat that will accommodate a rear-facing
child restraint, a rear-facing child restraint
should not be installed in your vehicle,
even if the airbag is off.
SeePassenger Sensing System 039 for
additional information. The vehicle has a front outboard passenger
frontal airbag and a passenger sensing
system. The passenger sensing system is
designed to turn off the front passenger
frontal airbag when an infant in a
rear-facing infant seat or a small child in a
forward-facing child restraint or booster seat
is detected. See
Securing Child Restraints
(With the Seat Belt in the Rear Seat) 064 or
Securing Child Restraints (With the Seat Belt
in the Front Seat) 069 and
Passenger Sensing System 039 for
important seat information and additional
information on installing a child restraint in
the front passenger position.
1. Put the child restraint on the right front passenger seat.
2. If the child restraint manufacturer's instructions recommend that the top
tether be attached, attach and tighten
the top tether hook to the top tether
anchor.
2.1. Route the top tether according to your child restraint instructions and
the following instructions:
If you are using a single tether,
raise the headrest or head restraint
and route the tether under the
headrest or head restraint and in
between the headrest or head
restraint posts.
If you are using a dual tether, route
the tether around the headrest or
head restraint.

GMC Canyon/Canyon Denali Owner Manual (GMNA-Localizing-U.S./Canada-
14430430) - 2021 - CRC - 9/9/20
62 Seats and Restraints
2.2. Attach the top tether hook to themetal wire on the lower inboard
side of the cab wall directly behind
the front passenger seat.
2.3. Tighten the top tether.
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 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/Headrest Removal and
Reinstallation
{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.
Crew Cab
The rear outboard head restraints can be
removed if they interfere with the proper
installation of the child restraint. To remove the head restraint:
1. Partially fold the seat forward.
2. Press the button on the side of the head
restraint post at the top of the seatback
and pull up on the head restraint.
3. Store the head restraint in a secure place.
4. Always reinstall the head restraint before the seating position is used by another
occupant.

GMC Canyon/Canyon Denali Owner Manual (GMNA-Localizing-U.S./Canada-
14430430) - 2021 - CRC - 9/9/20
Seats and Restraints 63
To reinstall the head restraint:
1. Insert the posts into the holes in the topof the seatback. The notch on the post
should face the driver side of the vehicle.
2. Push the head restraint down. Pull up on the head restraint to make sure it is
locked in place. Extended Cab
To remove the headrest:
1. Press the button on the side of the
headrest post on the top of the seatback
and pull up.
2. If removing the headrest to install a booster seat in the left rear seating
position, store the headrest in a secure
place.
Never install a forward-facing or
rearward-facing child restraint in the left
rear seating position.
3. If removing the headrest to install as a seat cushion extension for a
forward-facing or rearward-facing child
restraint in the right rear seating position, see the instructions in
“Securing
a Child Restraint with the LATCH System”
earlier in this section.
4. Always reinstall the headrest before the seating position is used by another
occupant.
To reinstall the headrest:
1. If installed as a seat cushion extension, first press both buttons on the front of
the seat cushion to remove the headrest.

GMC Canyon/Canyon Denali Owner Manual (GMNA-Localizing-U.S./Canada-
14430430) - 2021 - CRC - 9/9/20
64 Seats and Restraints
2. To reinstall the headrest, insert the postsinto the holes in the top of the seatback.
The notches on the posts should face the
driver side of the vehicle.
3. Push the headrest down. Pull up on the headrest to make sure 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
(Continued)
Warning (Continued)
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) 050 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)
050 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.
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 Restraint 049.

GMC Canyon/Canyon Denali Owner Manual (GMNA-Localizing-U.S./Canada-
14430430) - 2021 - CRC - 9/9/20
Seats and Restraints 65
Extended Cab
{Warning
Never secure a rear-facing or
forward-facing child restraint in the left
rear seating position in an extended cab
model. This seating position is not
suitable for child restraint installation.
The seat cushion is too short to properly
support a rear-facing or forward-facing
child restraint. A child could be seriously
injured or killed in a sudden stop or
crash.
A booster seat can be used in the left or
right rear seating position if the base of
the booster seat fits on the seat cushion
and does not extend past the front edge.
If it does, it should be installed in the
right rear seating position using the seat
cushion extension. Only install a booster
seat in either rear seating position if it
can be properly installed according to the
child restraint manufacturer’s instructions.
A rear-facing or forward-facing child
restraint can be installed in the right rear
seating position using the seat cushion(Continued)
Warning (Continued)
extension in an extended cab model.
Never install a rear-facing or
forward-facing child restraint in the right
rear seating position without the seat
cushion extension.
{Warning
Do not let anyone ride in the front
passenger seat when a rear-facing child
restraint is installed in the right rear
seating position. To properly fit the
rear-facing child restraint, the front
seatback will need to be tilted forward
which will not allow a passenger to sit
properly in the front outboard passenger
seat. The passenger could be seriously
injured or killed in a sudden stop or
crash.
A booster seat may be used in the left rear
seating position if the base of the booster
seat fits on the seat cushion and does not
extend past the front edge of the seat
cushion. If the booster seat extends past the front of the seat cushion, it should be used
in the right rear seating position with the
seat cushion extension.
When using the lap-shoulder belt to secure
the child restraint in this position, follow the
instructions that came with the child
restraint and the following instructions:
1. Always install the seat cushion extension in the right rear seat position when
installing a forward-facing or rear-facing
child restraint. Also use the seat cushion
extension for booster seats that extend
past the front edge of the seat cushion.
2. Press the button on the passenger sideheadrest and pull up.

GMC Canyon/Canyon Denali Owner Manual (GMNA-Localizing-U.S./Canada-
14430430) - 2021 - CRC - 9/9/20
Seats and Restraints 67
8. 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.9. To tighten the belt, push down on thechild restraint, pull the shoulder portion
of the belt to tighten the lap portion of
the belt, and feed the shoulder belt back
into the retractor. When installing a
forward-facing child restraint, it may be
helpful to use your knee to push down
on the child restraint as you tighten
the belt.
Try to pull the belt out of the retractor
to make sure the retractor is locked.
If the retractor is not locked, repeat
Steps 6 and 7.
10. Tighten the top tether. See Lower
Anchors and Tethers for Children (LATCH
System) 050. 11. Before placing a child in the child
restraint, make sure it is securely held in
place. To check, grasp the child restraint
at the seat belt path and attempt to
move it side to side and back and forth.
When the child restraint is properly
installed, there should be no more than
2.5 cm (1 in) of movement.
To remove the child restraint, unbuckle the
vehicle’s seat belt and let it return to the
stowed position. If the top tether is attached
to a top tether anchor, disconnect it.
Reinstall the headrest in the seatback before
the seating position is used. See “Head
Restraint/Headrest Removal and
Reinstallation” underLower Anchors and
Tethers for Children (LATCH System) 050 for
additional information on installing the
headrest properly.
Crew Cab
When using the lap-shoulder belt to secure
the child restraint in this position, follow the
instructions that came with the child
restraint and the following instructions:
1. If the head restraint interferes with the proper installation of the child restraint,
the head restraint may be removed. See
“Head Restraint/Headrest Removal and