GMC SIERRA DENALI 2019 Repair Manual

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - crc - 5/15/18
60 Keys, Doors, and Windows
Interior Mirrors Interior Rearview Mirrors Adjust the rearview mirror for a clear
view of the area behind your
vehicle.
Do not spray glass cleaner directly
on the mirror. Use a soft towel
dampened with water.
Manual Rearview Mirror If equipped, push the tab forward for
daytime use and pull it rearward for
nighttime use to avoid glare from
the headlamps from behind.
Automatic Dimming
Rearview Mirror If equipped, the mirror will
automatically reduce the glare of the
headlamps from behind. The
dimming feature comes on each
time the vehicle is started. Rear Camera Mirror If equipped, this automatic dimming
mirror provides a wide angle camera
view of the area behind the vehicle.
Pull the tab to turn on the display.
Push the tab to turn it off. When off
the mirror is automatic dimming.
Adjust the mirror for a clear view of
the area behind the vehicle while
the display is off. Press
V to scroll through the
adjustment options.
Press
t and
u to adjust the
settings using the indicators on the
mirror. The indicators will remain
visible for five seconds after the last
button activation, and the settings
will remain saved.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - crc - 5/15/18
Keys, Doors, and Windows 61The adjustment options are:
.
Brightness
.
Zoom .
Tilt
{ WarningThe Rear Camera Mirror (RCM)
has a limited view. Portions of the
road, vehicles, and other objects
may not be seen. Do not drive or
park the vehicle using only this
camera. Objects may appear
closer than they are. Check the
outside mirrors or glance over
your shoulder when making lane
changes or merging. Failure to
use proper care may result in
injury, death, or vehicle damage.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - crc - 5/15/18
62 Keys, Doors, and Windows Troubleshooting
See your dealer for service if a blue
screen and
3 are displayed in
the mirror, and the display shuts off.
Also, push the tab as indicated to
return to the automatic
dimming mode.
The Rear Camera Mirror may not
work properly or display a clear
image if:
.
There is glare from the sun or
headlamps. This may obstruct
objects from view. .
Dirt, snow, or other debris blocks
the camera lens. Clean the lens
with a soft damp cloth.
.
The camera ’ s mounting on the
vehicle has been damaged, and/
or the position or the mounting
angle of the camera has
changed.
Windows
{ WarningNever leave a child, a helpless
adult, or a pet alone in a vehicle,
especially with the windows
closed in warm or hot weather.
They can be overcome by the
extreme heat and suffer
permanent injuries or even death
from heat stroke.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - crc - 5/15/18
Keys, Doors, and Windows 63The vehicle aerodynamics are
designed to improve fuel economy
performance. This may result in a
pulsing sound when either rear
window is down and the front
windows are up. To reduce the
sound, open either a front window
or the sunroof, if equipped.
Manual Windows If equipped, turn the hand crank on
each door to manually raise or lower
the manual windows.
Power Windows
{ Warning
Children could be seriously
injured or killed if caught in the
path of a closing window. Never
leave the Remote Keyless Entry
(RKE) transmitter or keys in a
vehicle with children. When there
are children in the rear seat, use
the window lockout button to
prevent operation of the windows.
See Keys 0 30 . The power windows work when the
ignition is on, in ACC/ACCESSORY,
or when Retained Accessory Power
(RAP) is active. See Retained
Accessory Power (RAP) 0 225 .
Using the window switch, press to
open or pull to close the window.
The windows may be temporarily
disabled if they are used repeatedly
within a short time. Window Lockout
With Power Folding Mirrors,
Without Similar
This feature stops the rear door
passenger window switches from
working except from the driver
position.
Press
2 to engage the rear
window lockout feature. The
indicator light is on when engaged.
Press
2 again to disengage.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - crc - 5/15/18
64 Keys, Doors, and Windows Windows Express Movement All windows can be opened without
holding the window switch. Press
the switch down fully and quickly
release to express open the
window.
If equipped, pull the window switch
up fully and quickly release to
express close the window.
Briefly press or pull the window
switch in the same direction to stop
that window ’ s express movement.
Express Window Down
L : If equipped, this button will be
on the center stack.
Press and hold
L to open all
windows. Release
L to stop all
movement.
Use the power window switches to
close each window.
Window Automatic Reversal
System
The express-close feature will
reverse window movement if it
comes in contact with an object. Extreme cold or ice could cause the
window to auto-reverse. The
window will operate normally after
the object or condition is removed.
Automatic Reversal System
Override
{ WarningIf automatic reversal system
override is active, the window will
not reverse automatically. You or
others could be injured and the
window could be damaged.
Before using automatic reversal
system override, make sure that
all people and obstructions are
clear of the window path.
When the engine is on, override the
automatic reversal system by pulling
and holding the window switch if
conditions prevent it from closing. Programming the Power
Windows Programming may be necessary if
the vehicle battery has been
disconnected or discharged. If the
window is unable to express-up,
program each express-close
window:
1. Close all doors.
2. Turn the ignition on or to ACC/
ACCESSORY.
3. Partially open the window to be
programmed. Then close it and
continue to pull the switch
briefly after the window has
fully closed.
4. Open the window and continue
to press the switch briefly after
the window has fully opened.
Remote Window Operation
If equipped, this feature allows the
windows to be opened remotely.
If enabled in vehicle personalization,
press and hold
K on the RKE
transmitter. See Vehicle
Personalization 0 167 .

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - crc - 5/15/18
Keys, Doors, and Windows 65
Rear Windows Power Sliding Rear Window
If equipped, the power sliding rear
window works when the ignition has
been turned on or to ACC/
ACCESSORY, or Retained
Accessory Power (RAP) must be
active. See Retained Accessory
Power (RAP) 0 225 .
.
Press the switch to open the
window.
.
Pull the switch to close the
window. The power sliding rear window
cannot be operated manually.
Sun Visors
Pull the sun visor down to block
glare. If equipped, detach the sun
visor from the center mount to pivot
to the side window or to extend
along the rod.
If equipped, there is a lighted mirror
on the sun visor. Lift the cover
to open. Roof Sunroof
1. SLIDE Switch
2. TILT Switch
If equipped, the sunroof operates
when the ignition is on or in ACC/
ACCESSORY, or when Retained
Accessory Power (RAP) is active.
See Retained Accessory Power
(RAP) 0 225 .

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - crc - 5/15/18
66 Keys, Doors, and Windows Slide Switch
Express-Open/Express-Close : To
express-open the sunroof, fully
press and release
I (1). Press and
release
I (1) again to stop the
movement. To express-close the
sunroof, fully press and release
K(1). Press and release
K (1)
again to stop the movement.
Open/Close (Manual Mode) : To
open the sunroof, press and hold
I(1). Release
I (1) to stop the
movement. Press and hold
K (1)
to close the sunroof. Release
K(1) to stop the movement.
Tilt Switch
Vent : From the closed position,
press
J (2) to vent the sunroof.
Press
K (2) to close the vent.
When the sunroof is opened, an air
deflector will automatically raise.
The air deflector will retract when
the sunroof is closed. The sunroof also has a sunshade,
which can be pulled forward to block
sun rays. The sunshade must be
opened and closed manually.
Automatic Reversal System The sunroof has an automatic
reversal system that is only active
when the sunroof is operated in
express-close mode.
If an object is in the path while
express-closing, the reversal system
will detect an object, stop, and open
the sunroof again.
If frost or other conditions prevent
closing, override the feature by
closing the sunroof in manual mode.
To stop movement, release
K (1). Dirt and debris may collect on the
sunroof seal or in the track. This
could cause an issue with sunroof
operation or noise. It could also plug
the water drainage system.
Periodically open the sunroof and
remove any obstacles or loose
debris. Wipe the sunroof seal and
roof sealing area using a clean
cloth, mild soap, and water. Do not
remove grease from the sunroof
tracks.
If water is seen dripping into the
water drainage system, this is
normal.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - crc - 5/15/18
Seats and Restraints 67
Seats and
Restraints Head Restraints Head Restraints . . . . . . . . . . . . . . . 68
Front Seats Seat Adjustment . . . . . . . . . . . . . . . 69
Center Seat . . . . . . . . . . . . . . . . . . . . 70
Power Seat Adjustment . . . . . . . . 70
Lumbar Adjustment . . . . . . . . . . . . 71
Reclining Seatbacks . . . . . . . . . . . 71
Memory Seats . . . . . . . . . . . . . . . . . 73
Heated and Ventilated Front
Seats . . . . . . . . . . . . . . . . . . . . . . . . . 75
Rear Seats Rear Seats . . . . . . . . . . . . . . . . . . . . 77
Heated Rear Seats . . . . . . . . . . . . 78
Seat Belts Seat Belts . . . . . . . . . . . . . . . . . . . . . 79
How to Wear Seat Belts
Properly . . . . . . . . . . . . . . . . . . . . . . 80
Lap-Shoulder Belt . . . . . . . . . . . . . 82
Seat Belt Use During
Pregnancy . . . . . . . . . . . . . . . . . . . . 84
Seat Belt Extender . . . . . . . . . . . . . 84
Safety System Check . . . . . . . . . . 84 Seat Belt Care . . . . . . . . . . . . . . . . . 85
Replacing Seat Belt System
Parts after a Crash . . . . . . . . . . . 85
Airbag System Airbag System . . . . . . . . . . . . . . . . . 86
Where Are the Airbags? . . . . . . . 88
When Should an Airbag
Inflate? . . . . . . . . . . . . . . . . . . . . . . . 89
What Makes an Airbag
Inflate? . . . . . . . . . . . . . . . . . . . . . . . 90
How Does an Airbag
Restrain? . . . . . . . . . . . . . . . . . . . . . 90
What Will You See after an
Airbag Inflates? . . . . . . . . . . . . . . 91
Passenger Sensing System . . . 92
Servicing the Airbag-Equipped
Vehicle . . . . . . . . . . . . . . . . . . . . . . . 96
Adding Equipment to the
Airbag-Equipped Vehicle . . . . . 97
Airbag System Check . . . . . . . . . . 98
Replacing Airbag System Parts
after a Crash . . . . . . . . . . . . . . . . . 98
Child Restraints Older Children . . . . . . . . . . . . . . . . . 99
Infants and Young Children . . . 100
Child Restraint Systems . . . . . . 103
Where to Put the Restraint . . . 104
Lower Anchors and Tethers for
Children (LATCH System) . . . 106 Replacing LATCH System
Parts After a Crash . . . . . . . . . . 117
Securing Child Restraints (With
the Seat Belt in the
Rear Seat) . . . . . . . . . . . . . . . . . . 117
Securing Child Restraints (In
the Center Front Seat) . . . . . . 120
Securing Child Restraints (With
the Seat Belt in the Front
Outboard Seat) . . . . . . . . . . . . . 121

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - crc - 5/15/18
68 Seats and Restraints
Head Restraints
{ WarningWith 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.
Front Seats
The vehicle's front seats have
adjustable head restraints in the
outboard seating positions. 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. To raise or lower the head restraint,
press the button on the side of the
head restraint and pull up or push
the head restraint down and release
the button.
Pull and push on the head restraint
after the button is released to make
sure that it is locked in place.
The front seat outboard head
restraints are not removable.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - crc - 5/15/18
Seats and Restraints 69Rear Head Restraints The vehicle ’ s rear seat has head
restraints in the outboard seating
positions that cannot be adjusted.
The head restraint can be folded
forward to allow for better visibility
when the rear seat is unoccupied.
To fold the head restraint, press the
button on the side of the head
restraint.
When an occupant is in the seat,
always return the head restraint to
the upright position until it locks into place. Push and pull on the head
restraint to make sure that it is
locked.
If you are installing a child restraint
in the rear seat, see Lower Anchors
and Tethers for Children (LATCH
System) 0 106 .
Center Headrest
The vehicle ’ s rear seat may be
equipped with a headrest in the
center seating position that cannot
be adjusted.
If you are installing a child restraint
in the rear seat, see Lower Anchors
and Tethers for Children (LATCH
System) 0 106 .Front Seats Seat Adjustment
{ WarningYou can lose control of the
vehicle if you try to adjust a driver
seat while the vehicle is moving.
Adjust the driver seat only when
the vehicle is not moving.
To adjust a manual seat:
1. Pull the handle at the front of
the seat.