2015 GMC SIERRA REAR SEATS

Black plate (44,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
3-44 Seats and Restraints
2.3.2. Route the toptether (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.
Headrest Removal and
Reinstallation
Removing Rear Headrests
For outboard rear seating positions,
if the child restraint cannot be
installed properly with the head rest
in place, the headrest may be
removed. See your dealer for
assistance with removal and store
the removed headrests in a secure
place. When the child restraint is
removed, reinstall the headrest
before the seating position is used. Reinstalling Rear Headrests
To reinstall the headrest:
1. Insert the headrest posts into the
holes in the top of the seatback
with the longer chrome plated
post toward the driver side of the
vehicle.
2. Push the headrest all the way down until it contacts the top of
the seatback.

Black plate (45,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
Seats and Restraints 3-45
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
(Rear Seat)
When securing a child restraint in a
rear seating 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) on page 3-38 for how and
where to install the child restraint
using LATCH. If you secure a child
restraint using a safety belt and it
uses a top tether, see Lower
Anchors and Tethers for Children
(LATCH System) on page 3-38 for
top tether anchor locations.
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 anchored, or if
the instructions that come with the
child restraint say that the top strap
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 safety
belt to secure the child restraint in
this position. Be sure to follow the
instructions that came with the child
restraint. Secure the child in the
child restraint when and as the
instructions say.
If more than one child restraint
needs to be installed in the rear
seat, be sure to read
Where to Put
the Restraint on page 3-37.
If the child restraint manufacturer
recommends using a top tether,
attach and tighten the top tether to
the top tether anchor. Refer to the
instructions that came with the child
restraint and see Lower Anchors
and Tethers for Children (LATCH
System) on page 3-38.
1. Put the child restraint on
the seat.

Black plate (47,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
Seats and Restraints 3-47
6. If the child restraint has a toptether, follow the child restraint
manufacturer's instructions
regarding the use of the top
tether. See Lower Anchors and
Tethers for Children (LATCH
System) on page 3-38.
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
safety 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 safety belt and
let it return to the stowed position.
If the top tether is attached to a top
tether anchor, disconnect it.
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, and store
the removed headrest in a secure
place. When the child restraint is
removed, reinstall the headrest
before the seating position is used.
For reinstallation instructions, see
“Headrest Removal and
Reinstallation”
underLower Anchors
and Tethers for Children (LATCH
System) on page 3-38.
Securing Child Restraints
(Front Passenger Seat)
Light-Duty Vehicles
This vehicle has airbags. A rear
seat is a safer place to secure a
forward-facing child restraint. See
Where to Put the Restraint on
page 3-37.
In addition, the vehicle has a
passenger sensing system which is
designed to turn off the front
outboard passenger frontal airbag under certain conditions. See
Passenger Sensing System on
page 3-24
andPassenger Airbag
Status Indicator on page 5-17 for
more information on this, including
important safety information.
Never put a rear-facing child seat in
the front. This is because the risk to
the rear-facing child is so great,
if the airbag deploys.
{Warning
A child in a rear-facing child
restraint can be seriously injured
or killed if the front outboard
passenger frontal 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 front
outboard passenger frontal airbag
inflates and the passenger seat is
in a forward position.
(Continued)

Black plate (48,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
3-48 Seats and Restraints
Warning (Continued)
Even if the passenger sensing
system has turned off the front
outboard 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.
Secure rear-facing child restraints
in a rear seat, even if the airbag
is off. If you secure a
forward-facing child restraint in
the front seat, always move the
front passenger seat as far back
as it will go. It is better to secure
the child restraint in a rear seat.
SeePassenger Sensing System
on page 3-24 for additional
information. If a child restraint uses a top tether,
see
Lower Anchors and Tethers for
Children (LATCH System) on
page 3-38 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 strap
must be anchored.
In Canada, the law requires that
forward-facing child restraints have
a top tether, and that the tether be
attached. 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. Move the seat as far back as it
will go before securing the
forward-facing child restraint.
When the passenger sensing
system has turned off the front
outboard passenger frontal
airbag, the off indicator in the
passenger airbag status
indicator should light and stay lit
when you start the vehicle. See
Passenger Airbag Status
Indicator on page 5-17.
2. Put the child restraint on the seat.
3. Pick up the latch plate, and run the lap and shoulder portions of
the vehicle's safety belt through
or around the restraint. The child
restraint instructions will show
you how.

Black plate (50,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
3-50 Seats and Restraints
7. Before placing a child in thechild restraint, make sure it is
securely held in place. To check,
grasp the child restraint at the
safety 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.
If the airbag is off, the off indicator in
the passenger airbag status
indicator will come on and stay on
when the vehicle is started.
If a child restraint has been installed
and the on indicator is lit, see “If the
On Indicator Is Lit for a Child
Restraint” underPassenger Sensing
System on page 3-24 for more
information.
To remove the child restraint,
unbuckle the vehicle safety belt and
let it return to the stowed position.Heavy-Duty Vehicles
This vehicle has airbags. A rear
seat is a safer place to secure a
forward-facing child restraint. See
Where to Put the Restraint on
page 3-37.
Never put a rear-facing child seat in
the front. This is because the risk to
the rear-facing child is so great,
if the airbag deploys.
{Warning
A child in a rear-facing child
restraint can be seriously injured
or killed if the front outboard
passenger airbag inflates. This is
because the back of the
rear-facing child restraint would
be very close to the inflating
airbag. Always secure a
rear-facing child restraint in a
rear seat. If a child restraint uses a top tether,
see
Lower Anchors and Tethers for
Children (LATCH System) on
page 3-38 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 strap
must be anchored.
In Canada, the law requires that
forward-facing child restraints have
a top tether, and that the tether be
attached.
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. Move the seat as far back as it will go before securing the
forward-facing child restraint.
2. Put the child restraint on the seat.

Black plate (5,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
Instruments and Controls 5-5
To set the clock display:
1. Select SETTINGS from theHome Page, then select Time
and Date.
2. Select Clock Display.
3. Turn the MENU knob to Off or On.
4. Press the MENU knob to select.
Press
oBACK to go to the last
menu and save the changes.
Setting the Time and Date with
Touchscreen Controls
To set the time:
1. Press the SETTINGS screen button from the Home Page,
then press Time and Date.
2. Press Set Time and press
«or
ªto increase or decrease
hours, minutes, and AM or PM.
Press 12–24 Hr for 12 or
24 hour clock.
3. Press the
}screen button to go
back to the previous menu. Auto Set requires an OnStar
subscription.
If auto timing is set, the time
displayed on the clock may not
update immediately when driving
into a new time zone.
To set the date:
1. Press the SETTINGS screen
button from the Home Page,
then press Time and Date.
2. Press Set Date and press
«or
ªto increase or decrease
month, day, or year.
3. Press the
}screen button to go
back to the previous menu.
To set the clock display:
1. Press the SETTINGS screen button and press Time and Date.
2. Press Clock Display and press OFF or ON to turn the clock
display off or on.
3. Press the
}screen button to go
back to the previous menu.
Power Outlets
Accessory power outlets can be
used to plug in electrical equipment,
such as a cell phone, MP3
player, etc.
The vehicle may have up to four
accessory power outlets.
Vehicles with a Center Console
.One or two in front of the
cupholders on the center
console.
.One inside the center console.
.One on the rear of the center
console.
Vehicles with Bench Seats
.One on the center stack below
the climate control system.
.One or two in the storage area
on the bench seat.
Lift the cover to access and replace
when not in use.

Black plate (46,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
5-46 Instruments and Controls
Park Assist
If equipped, this allows the feature
to be turned on or off. See
Assistance Systems for Parking or
Backing on page 9-56.
Select Off, On, or On with Towbar
Attached.
Comfort and Convenience
Select the Comfort and
Convenience menu and the
following may display:
.Auto Memory Recall
.Easy Exit Options
.Chime Volume
.Reverse Tilt Mirror
.Auto Mirror Folding
Auto Memory Recall
This allows the feature to be turned
on or off. See Memory Seats on
page 3-5.
Select On or Off. Easy Exit Options
This allows the feature to be turned
on or off. See
Memory Seats on
page 3-5.
Select On or Off.
Chime Volume
This allows the selection of the
chime volume level.
Press + or −to adjust the volume.
Reverse Tilt Mirror
When on, the driver and/or
passenger mirrors will tilt downward
when the vehicle is shifted to
R (Reverse) to improve visibility of
the ground near the rear wheels.
Select Off, On - Driver and
Passenger, On - Driver, or On -
Passenger.
Auto Mirror Folding
When on, the outside rearview
mirrors will automatically fold or
unfold when the Remote Keyless
Entry (RKE) transmitter
QorK
button is pressed and held. Select Off or On.
Lighting
Select the Lighting menu and the
following may display:
.Vehicle Locator Lights
.Exit Lighting
Vehicle Locator Lights
This feature will flash the exterior
lights when
Kon the Remote
Keyless Entry (RKE) transmitter is
pressed to locate the vehicle.
Select On or Off.
Exit Lighting
This allows the selection of how
long the exterior lamps stay on
when leaving the vehicle when it is
dark outside.
Select Off, 30 Seconds, 60
Seconds, or 120 Seconds.

Black plate (8,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
6-8 Lighting
Lighting Features
Entry Lighting
The vehicle has an illuminated entry
feature.
When a door is opened, the dome
lamps and puddle lamps come on if
the dome lamp control is in the
DOOR position. If the dome lamp
control is in the OFF position, the
lamps do not come on.
The headlamps, parking lamps,
taillamps, and back-up lamps turn
on briefly at night, or in areas with
limited lighting, when
Kis pressed
on the Remote Keyless Entry (RKE)
transmitter. After about 30 seconds
the exterior lamps turn off. Entry
lighting can be disabled manually by
changing the ignition out of the OFF
position, or by pressing the RKE
transmitter
Qbutton.
This feature can be changed. See
“Vehicle Locator Lights” under
Vehicle Personalization on
page 5-42.
Exit Lighting
The interior lamps, headlamps,
parking lamps, back-up lamps, and
license plate lamps come on when
the key is removed from the ignition.
The interior lamps turn off
automatically in 20 seconds. The
interior lamps do not come on if the
dome lamp control is in the OFF
position.
The exterior lamps turn off
immediately by turning the exterior
lamps control off.
This feature can be changed. See
Vehicle Personalization on
page 5-42.
Battery Load
Management
The vehicle has Electric Power
Management (EPM), which
estimates the battery's temperature
and state of charge. It then adjusts
the voltage for best performance
and extended life of the battery. When the battery's state of charge
is low, the voltage is raised slightly
to quickly bring the charge back up.
When the state of charge is high,
the voltage is lowered slightly to
prevent overcharging. The voltmeter
gauge or the voltage display on the
Driver Information Center (DIC),
if equipped, may show the voltage
moving up or down. This is normal.
If there is a problem, an alert will be
displayed.
The battery can be discharged at
idle if the electrical loads are very
high. This is true for all vehicles.
This is because the generator
(alternator) may not be spinning fast
enough at idle to produce all the
power that is needed for very high
electrical loads.
A high electrical load occurs when
several of the following are on, such
as: headlamps, high beams, fog
lamps, rear window defogger,
climate control fan at high speed,
heated seats, engine cooling fans,
trailer loads, and loads plugged into
accessory power outlets.