GMC SIERRA 1500 2017 Workshop Manual

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 5/3/16
50 Seats and Restraints
Seats and
Restraints
Head Restraints
Head Restraints . . . . . . . . . . . . . . . 51
Front Seats
Power Seat Adjustment . . . . . . . . 52
Lumbar Adjustment . . . . . . . . . . . . 52
Reclining Seatbacks . . . . . . . . . . . 53
Memory Seats . . . . . . . . . . . . . . . . . 54
Heated and Ventilated FrontSeats . . . . . . . . . . . . . . . . . . . . . . . . . 55
Rear Seats
Rear Seats (Double Cab FullBench) . . . . . . . . . . . . . . . . . . . . . . . 57
Rear Seats (Split Bench) . . . . . . 58
Safety Belts
Safety Belts . . . . . . . . . . . . . . . . . . . . 59
How to Wear Safety Belts Properly . . . . . . . . . . . . . . . . . . . . . . 60
Lap-Shoulder Belt . . . . . . . . . . . . . 61
Safety Belt Use During Pregnancy . . . . . . . . . . . . . . . . . . . . 64
Lap Belt . . . . . . . . . . . . . . . . . . . . . . . 64
Safety Belt Extender . . . . . . . . . . . 65
Safety System Check . . . . . . . . . . 65 Safety Belt Care . . . . . . . . . . . . . . . 65
Replacing Safety Belt System
Parts after a Crash . . . . . . . . . . . 66
Airbag System
Airbag System . . . . . . . . . . . . . . . . . 66
Where Are the Airbags? . . . . . . . 68
When Should an AirbagInflate? . . . . . . . . . . . . . . . . . . . . . . . 69
What Makes an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . . . 71
How Does an Airbag Restrain? . . . . . . . . . . . . . . . . . . . . . 71
What Will You See after an Airbag Inflates? . . . . . . . . . . . . . . 71
Airbag On-Off Switch . . . . . . . . . . 73
Passenger Sensing System . . . 75
Servicing the Airbag-Equipped Vehicle . . . . . . . . . . . . . . . . . . . . . . . 79
Adding Equipment to the Airbag-Equipped Vehicle . . . . . 79
Airbag System Check . . . . . . . . . . 80
Replacing Airbag System Parts after a Crash . . . . . . . . . . . . . . . . . 81
Child Restraints
Older Children . . . . . . . . . . . . . . . . . 81
Infants and Young Children . . . . 83
Child Restraint Systems . . . . . . . 85
Where to Put the Restraint . . . . . 87 Lower Anchors and Tethers for
Children (LATCH System) . . . . 88
Replacing LATCH System Parts After a Crash . . . . . . . . . . . . . . . . . 94
Securing Child Restraints (With
the Safety Belt in the
Rear Seat) . . . . . . . . . . . . . . . . . . . 95
Securing Child Restraints (With the Safety Belt in the Center
Front Seat) . . . . . . . . . . . . . . . . . . . 98
Securing Child Restraints (With the Safety Belt in the Front
Passenger Seat) . . . . . . . . . . . . . 98

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 5/3/16
Seats and Restraints 51
Head Restraints
Front Seats
The vehicle’s front seats have
adjustable head restraints in the
outboard seating positions.
{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.
Adjust the head restraint so that the
top of the restraint is at the same
height as the top of the occupant's
head. This position reduces the
chance of a neck injury in a crash.The height of the head restraint can
be adjusted. Pull the head restraint
up to raise it. Try to move the head
restraint to make sure that it is
locked in place.
To lower the head restraint, press
the button, located on the top of the
seatback, and push the restraint
down. Try to move the head
restraint after the button is released
to make sure that it is locked in
place.
The head restraints adjust forward
and rearward. To adjust the head
restraint forward, grasp the head
restraint and pull forward to the
desired locking position. To adjust

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 5/3/16
52 Seats and Restraints
the head restraint rearward, grasp
the head restraint and pull forward
fully until the mechanism releases
and allows the head restraint to
return to the full rear position.
The front seat outboard head
restraints are not removable.
Rear Seats
The rear seat has adjustable
headrests in the outboard seating
positions.
The height of the headrest can be
adjusted. Pull the headrest up to
raise it. To lower the headrest, push
the headrest down.
If you are installing a child restraint
in the rear seat, see“Securing a
Child Restraint Designed for the
LATCH System” underLower
Anchors and Tethers for Children
(LATCH System) 088.
Front Seats
Power Seat Adjustment
To adjust a power seat:
.
Move the seat forward or
rearward by sliding the control
forward or rearward.
. Raise or lower the front part of
the seat cushion by moving the
front of the control up or down.
. Raise or lower the seat by
moving the rear of the control up
or down. To adjust the recline, see
Reclining
Seatbacks 053.
To adjust the lumbar support, see
Lumbar Adjustment 052.
Some vehicles are equipped with a
feature that activates a vibrating
pulse alert in the driver seat to help
the driver avoid crashes. See Driver
Assistance Systems 0290.
Lumbar Adjustment

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 5/3/16
Seats and Restraints 53
To adjust the power lumbar support:
.Press and hold the control
forward to increase or rearward
to decrease upper and lower
lumbar support at the same time.
. Press and hold the control up to
increase upper lumbar support
and decrease lower lumbar
support.
Press and hold the control down
to increase lower lumbar support
and decrease upper lumbar
support.
Reclining Seatbacks
To adjust the seatback:
.Tilt the top of the control
rearward to recline.
. Tilt the top of the control forward
to raise.
{Warning
Sitting in a reclined position when
the vehicle is in motion can be
dangerous. Even when buckled
up, the safety belts cannot do
their job.
The shoulder belt will not be
against your body. Instead, it will
be in front of you. In a crash, you
could go into it, receiving neck or
other injuries.
The lap belt could go up over
your abdomen. The belt forces
would be there, not at your pelvic
bones. This could cause serious
internal injuries.
(Continued)
Warning (Continued)
For proper protection when the
vehicle is in motion, have the
seatback upright. Then sit well
back in the seat and wear the
safety belt properly.
Do not have a seatback reclined if
the vehicle is moving.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 5/3/16
54 Seats and Restraints
Memory Seats
Crew/Double Cab Shown, OtherModels Similar
If memory equipped, the SET, 1, 2,
and
B(Exit) buttons on the driver
door are used to manually store and
recall memory settings for the driver
seat, outside mirrors, and adjustable
pedals (if equipped).
Storing Memory Positions
To store positions to the 1 and 2
buttons:
1. The ignition must be in ON/ RUN or ACC/ACCESSORY. 2. Adjust the driver seat, outside
mirrors, and adjustable pedals
(if equipped) to the desired
driving positions.
3. Press and release SET. A beep will sound.
4. Immediately press and hold 1 until two beeps sound.
5. Repeat Steps 1–4 for a second driver using 2.
To store positions to the
B(Exit)
button and easy exit features,
repeat Steps 1–4 above using
Bto
store your positions for getting out
of the vehicle.
Manually Recalling Memory
Positions
Press and hold 1, 2, or
B(Exit) to
manually recall the previously
stored memory positions. Releasing
1, 2, or
Bbefore the stored
positions are reached stops the
recall. Automatically Recalling Memory
Positions (Auto Recall)
If programmed on in the vehicle
personalization menu, the Auto
(Automatic) Memory Recall feature
automatically recalls the current
driver
’s previously stored 1 or 2
position when the ignition is
changed from OFF to ON/RUN or
ACC/ACCESSORY.
See “Auto Memory Recall” under
“Comfort and Convenience” in
Vehicle Personalization 0155.
To stop recall movement, press one
of the memory, power mirror or
power seat controls; or press the
adjustable pedal control (if
equipped).
RKE transmitters are not labeled
with a number. If your memory seat
position is stored to 1 or 2 but this
position is not automatically
recalling, then store your positions
to the other button or switch RKE
transmitters with the other driver.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 5/3/16
Seats and Restraints 55
Easy Exit Recall
If programmed on in the vehicle
personalization menu, the easy exit
feature automatically recalls the
previously stored
B(Exit) position.
See “Storing Memory Positions”
listed previously. See also Vehicle
Personalization 0155.
Easy exit recall automatically
activates when one of the following
occurs:
. The vehicle is turned off and the
driver door is opened within a
short time.
. The vehicle is turned off with the
driver door open.
To stop recall movement, press one
of the memory, power mirror or
power seat controls; or press the
adjustable pedal control (if
equipped).
Obstructions
If something has blocked the driver
seat and/or adjustable pedals while
recalling a memory position, the recall may stop. Remove the
obstruction. Then do one of the
following:
.
For manual or automatic recall
positions, press and hold the
appropriate manual control for
two seconds. Try recalling again
by pressing the appropriate
memory button.
. For exit recall position, press
and hold the appropriate manual
control for the exit feature not
recalling for two seconds. Then
try recalling the exit position
again.
If the memory position is still not
recalling, see your dealer for
service.
Heated and Ventilated
Front Seats
{Warning
If you cannot feel temperature
change or pain to the skin, the
seat heater may cause burns. To (Continued)
Warning (Continued)
reduce the risk of burns, people
with such a condition should use
care when using the seat heater,
especially for long periods of
time. Do not place anything on
the seat that insulates against
heat, such as a blanket, cushion,
cover, or similar item. This may
cause the seat heater to
overheat. An overheated seat
heater may cause a burn or may
damage the seat.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 5/3/16
56 Seats and Restraints
Heated and Ventilated Seat
Buttons Shown, Heated Seat Buttons Similar
If equipped, the buttons are on the
center stack. To operate, the engine
must be running.
Press
Ito heat the driver or
passenger seatback only.
Press
Jto heat the driver or
passenger seat cushion and
seatback.
Press
Cto ventilate the driver or
passenger seat.
The indicator light on the button
comes on when this feature is on. Press the button once for the
highest setting. With each press of
the button, the seat will change to
the next lower setting, and then to
the off setting. The indicator lights
next to the buttons indicate three for
the highest setting and one for the
lowest. If the heated seats are on
high for an extended time, their level
may automatically be lowered.
Remote Start Auto Heated and
Ventilated Seats
During a remote start, the heated or
ventilated seats can be turned on
automatically. When it is cold
outside, the heated seats turn on,
and when it is hot outside the
ventilated seats turn on. The heated
or ventilated seats are canceled
when the ignition is turned on. Press
the heated or ventilated seat button
to use the heated or ventilated seats
after the vehicle is started.
The heated or ventilated seat
indicator lights do not turn on during
a remote start.
The temperature performance of an
unoccupied seat may be reduced.
This is normal.The heated or ventilated seats will
not turn on during a remote start
unless they are enabled in the
vehicle personalization menu. See
Remote Vehicle Start
033 and
Vehicle Personalization 0155.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 5/3/16
Seats and Restraints 57
Rear Seats
Rear Seats (Double Cab
Full Bench)
Rear Seat Reminder (Full
Bench Only)
Look in Rear Seat Reminder
Feature
If equipped, this message displays
under certain conditions indicating
there may be an item or passenger
in the rear seat. Check before
exiting the vehicle.
This feature will activate when a
second row door is opened while
the vehicle is on or up to 10 minutes
before the vehicle is turned on,
including if the vehicle was started
remotely. There will be an alert
when the vehicle is turned off. The
alert does not directly detect objects
in the rear seat; instead, under
certain conditions, it detects when a
rear door is opened and closed,
indicating that there may be
something in the rear seat.The feature is active only once each
time the vehicle is turned on and off,
and will require reactivation by
opening and closing the second row
doors. There may be an alert even
when there is nothing in the rear
seat; for example, if a child entered
the vehicle through the rear door
and left the vehicle without the
vehicle being shut off.
The feature can be turned on or off
through
Vehicle
Personalization 0155.
Folding the Rear Seat
Caution
Folding a rear seat with the safety
belts still fastened may cause
damage to the seat or the safety
belts. Always unbuckle the safety
belts and return them to their
normal stowed position before
folding a rear seat.
To fold the seat:1. Pull up on the front of the seat cushion while pulling down on
the release strap loop under
the seat cushion.
2. Pull the seat cushion up until it latches with the seatback.
3. Pull forward on the seat cushion to make sure it is
locked in place.
To unfold the seat: 1. Push the seat cushion rearward while pulling the
release strap loop under the
seat cushion. Pull the seat
cushion down until it latches.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 5/3/16
58 Seats and Restraints
2. Pull up on the seat cushion tomake sure it is locked in place.
Make sure the safety belts are
not twisted or caught in the
seat cushion.
{Warning
A safety belt that is improperly
routed, not properly attached,
or twisted will not provide the
protection needed in a crash. The
person wearing the belt could be
seriously injured. After raising the
rear seatback, always check to be
sure that the safety belts are
properly routed and attached, and
are not twisted.
Rear Seats (Split Bench)
Folding the Rear Seat
Either side of the rear seat can be
folded for added cargo space.
Caution
Folding a rear seat with the safety
belts still fastened may cause
damage to the seat or the safety
belts. Always unbuckle the safety
belts and return them to their
normal stowed position before
folding a rear seat.
Make sure that nothing is on the
seat cushion.
To fold the seat, slowly pull the seat
cushion up. To return the seat to the normal
seating position, slowly pull the seat
cushion down.
Make sure the safety belts are not
twisted or caught in the seat
cushion.
{Warning
A safety belt that is improperly
routed, not properly attached,
or twisted will not provide the
protection needed in a crash. The
person wearing the belt could be
seriously injured. After raising the
rear seatback, always check to be
sure that the safety belts are
properly routed and attached, and
are not twisted.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 5/3/16
Seats and Restraints 59
Safety Belts
This section describes how to use
safety belts properly, and some
things not to do.
{Warning
Do not let anyone ride where a
safety belt cannot be worn
properly. In a crash, if you or your
passenger(s) are not wearing
safety belts, injuries can be much
worse than if you are wearing
safety belts. You can be seriously
injured or killed by hitting things
inside the vehicle harder or by
being ejected from the vehicle. In
addition, anyone who is not
buckled up can strike other
passengers in the vehicle.
It is extremely dangerous to ride
in a cargo area, inside or outside
of a vehicle. In a collision,
passengers riding in these areas
are more likely to be seriously
injured or killed. Do not allow(Continued)
Warning (Continued)
passengers to ride in any area of
the vehicle that is not equipped
with seats and safety belts.
Always wear a safety belt, and
check that all passenger(s) are
restrained properly too.
This vehicle has indicators as a
reminder to buckle the safety belts.
See Safety Belt Reminders 0129.
This vehicle may have the Safety
Belt Assurance System, which may
prevent the vehicle from shifting out
of P (Park). See Safety Belt
Messages 0150.
Why Safety Belts Work
When riding in a vehicle, you travel
as fast as the vehicle does. If the
vehicle stops suddenly, you keep
going until something stops you.
It could be the windshield, the
instrument panel, or the safety belts!
When you wear a safety belt, you
and the vehicle slow down together.
There is more time to stop because
you stop over a longer distance and,
when worn properly, your strongest
bones take the forces from the
safety belts. That is why wearing
safety belts makes such good
sense.