
Black plate (18,1)GMC Sierra Owner Manual (GMNA Localizing-U.S/Canada/Mexico-
7299746) - 2015 - crc - 11/11/13
2-18 Keys, Doors, and Windows
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.
Windows
{Warning
Never 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.
The 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 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 on page 2-1.

Black plate (21,1)GMC Sierra Owner Manual (GMNA Localizing-U.S/Canada/Mexico-
7299746) - 2015 - crc - 11/11/13
Keys, Doors, and Windows 2-21
Window Lockout
Crew/Double Cab Premium
Shown, Other Models Similar
Z(Window Lockout): The driver
door power window switch has a
lockout feature. This feature
prevents the rear windows from
operating, except from the driver
position. Press the switch to engage
or disengage the lockout feature. An
indicator light on the switch will
come on when the lockout feature is
engaged, and will go off when
disengaged.
Rear Windows
Power Sliding Rear Window
If equipped, the power sliding rear
window works when the ignition has
been turned to ACC/ACCESSORY
or ON/RUN, or when Retained
Accessory Power (RAP) is active.
See Retained Accessory Power
(RAP) on page 9-28.
.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.

Black plate (22,1)GMC Sierra Owner Manual (GMNA Localizing-U.S/Canada/Mexico-
7299746) - 2015 - crc - 11/11/13
2-22 Keys, Doors, and Windows
Roof
Sunroof
If equipped, the sunroof operates
when the ignition is in ACC/
ACCESSORY or ON/RUN, or when
Retained Accessory Power (RAP) is
active. SeeRetained Accessory
Power (RAP) on page 9-28.
Vent: From the closed position,
press the rear of the TILT switch to
vent the sunroof. Manual-Open/Manual-Close:
To
open the sunroof, press and hold
the rear of the SLIDE switch until
the sunroof reaches the desired
position. Press and hold the front of
the SLIDE switch to close it
Express-Open/Express-Close: To
express-open the sunroof, fully
press and release the rear of the
SLIDE switch until the sunroof
reaches the desired position. To
express-close the sunroof, fully
press and release the front of the
SLIDE switch. Press the switch
again to stop it.
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.
If an object is in the path of the
sunroof while it is closing, the
anti-pinch feature will detect the
object and stop the sunroof.
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.

Black plate (6,1)GMC Sierra Owner Manual (GMNA Localizing-U.S/Canada/Mexico-
7299746) - 2015 - crc - 11/11/13
3-6 Seats and Restraints
To adjust a manual seatback:
1. Lift the lever.The seatback will automatically
fold forward.
2. To recline, move the seatback rearward to the desired position,
then release the lever to lock the
seatback in place.
3. Push and pull on the seatback to make sure it is locked.
To return the seatback to the upright
position:
1. Lift the lever fully without applying pressure to the
seatback, and the seatback will
return to the upright position.
2. Push and pull on the seatback to make sure it is locked.Power Reclining Seatbacks
To recline a power seatback,
if equipped:
.Tilt the top of the control
rearward to recline.
.Tilt the top of the control forward
to raise.
Memory Seats
Crew/Double Cab Shown, Other
Models Similar
If memory equipped, the SET, "1,"
"2," and
B(Exit) buttons on the
driver door are used to manually
save and recall memory settings for
the driver seat, outside mirrors, and
adjustable pedals (if equipped).

Black plate (7,1)GMC Sierra Owner Manual (GMNA Localizing-U.S/Canada/Mexico-
7299746) - 2015 - crc - 11/11/13
Seats and Restraints 3-7
Storing Memory Positions
To save positions to the“1”and “2”
buttons:
1. Adjust the driver seat, outside mirrors, and adjustable pedals (if
equipped) to the desired driving
positions.
2. Press and release SET, then immediately press and hold “1”
until a beep sounds.
3. Repeat Steps 1 and 2 for a second driver using “2.”
To save positions to the
B(Exit)
button and easy exit features:
1. Adjust the driver seat, adjustable pedals (if equipped), and the
outside mirrors on some vehicles
to the desired positions for
getting out of the vehicle.
2. Press and release SET, then immediately press and hold
B
until a beep sounds. Manually Recalling Memory
Positions
If the vehicle is OFF or not in
P (Park), press and hold "1," "2," or
Bto manually recall the previously
stored memory positions. Releasing
"1,” "2," or
Bbefore the stored
positions are reached stops the
recall.
If the vehicle is ON and in P (Park),
press and release “1,” “2,”or
Bto
manually recall the previously
stored memory positions. Placing
the ignition in OFF/LOCK before the
stored positions are reached stops
the recall.
If something has blocked the driver
seat and/or adjustable pedals while
recalling a memory position, the
recall may stop. Remove the
obstruction; then press and hold the
appropriate manual control for the
memory item that is not recalling for
two seconds. Try recalling the
memory position again by pressing
the appropriate memory button. If the memory position is still not
recalling, see your dealer for
service.
Automatically Recalling Memory
Positions (Auto Memory Recall)
The Auto (Automatic) Memory
Recall feature automatically recalls
the current driver
’s previously stored
“1” or“2” position when entering the
vehicle.
If the Auto Memory Recall feature is
enabled in the vehicle
personalization menu, memory “1”
or “2” positions are recalled in the
following ways:
.PressKon the RKE transmitter
and open the driver door.
.PressKon the RKE transmitter
when the driver door is
already open.
See Vehicle Personalization on
page 5-45.

Black plate (8,1)GMC Sierra Owner Manual (GMNA Localizing-U.S/Canada/Mexico-
7299746) - 2015 - crc - 11/11/13
3-8 Seats and Restraints
To stop recall movement, press one
of the memory, power mirror or
power seat controls; or press the
adjustable pedal control (if
equipped).
If something has blocked the driver
seat and/or the adjustable pedals (if
equipped) while recalling a memory
position, the recall may stop.
Remove the obstruction; then press
and hold the appropriate manual
control for the memory item that is
not recalling for two seconds. Try
recalling the memory position again
by opening the driver door and
pressing
Kon the RKE transmitter.
If the memory position is still not
recalling, see your dealer for
service.
Easy Exit Recall
If programmed on in the vehicle
personalization menu, the easy exit
feature automatically moves the
driver seat, adjustable pedals (if
equipped), and outside mirrors on
some vehicles to the memory
positions saved to the
B(Exit) button. See
“Storing Memory
Positions” listed previously. See
also Vehicle Personalization on
page 5-45.
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.
If something has blocked the driver
seat and/or adjustable pedals (if
equipped) while recalling the exit
position, the recall may stop.
Remove the obstruction; then press
and hold the appropriate manual
control for the exit feature not
recalling for two seconds. Try
recalling the exit position again.
If the exit position is still not
recalling, see your dealer for
service.
Heated and Cooled Front
Seats
{Warning
If you cannot feel temperature
change or pain to the skin, the
seat heater may cause burns. To
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.

Black plate (16,1)GMC Sierra Owner Manual (GMNA Localizing-U.S/Canada/Mexico-
7299746) - 2015 - crc - 11/11/13
3-16 Seats and Restraints
To unlatch the belt, push the button
on the buckle. The belt should
return to its stowed position.
Before a door is closed, be sure the
safety belt is out of the way. If a
door is slammed against a safety
belt, damage can occur to both the
safety belt and the vehicle.
Shoulder Belt Height Adjuster
The vehicle has a shoulder belt
height adjuster for the driver and
front outboard passenger.Adjust the height so the shoulder
portion of the belt is on the shoulder
and not falling off of it. The belt
should be close to, but not
contacting, the neck. Improper
shoulder belt height adjustment
could reduce the effectiveness of
the safety belt in a crash. See
How
to Wear Safety Belts Properly on
page 3-13.Push down on the release button to
move the height adjuster to the
desired position.
Move the adjuster up by pushing up
on the shoulder belt guide. After the adjuster is set to the
desired position, try to move it down
without pushing the release button
to make sure it has locked into
position.
Safety Belt Pretensioners
This vehicle has safety belt
pretensioners for front outboard
occupants. Although the safety belt
pretensioners cannot be seen, they
are part of the safety belt assembly.
They can help tighten the safety
belts during the early stages of a
moderate to severe frontal, near
frontal, or rear crash if the threshold
conditions for pretensioner
activation are met. And, if your
vehicle has side impact airbags,
safety belt pretensioners can help
tighten the safety belts in a side
crash. If the vehicle has rollover
roof-rail airbags, safety belt
pretensioners can help tighten the
safety belts in a rollover event.
Pretensioners work only once. If the
pretensioners activate in a crash,
they will need to be replaced, and

Black plate (24,1)GMC Sierra Owner Manual (GMNA Localizing-U.S/Canada/Mexico-
7299746) - 2015 - crc - 11/11/13
3-24 Seats and Restraints
Driver Side Shown, PassengerSide Similar
If the vehicle has seat-mounted side
impact airbags for the driver and
front outboard passenger, they are
in the side of the seatbacks closest
to the door.Driver Side Crew Cab Shown, Passenger Side Double and Regular Cabs Similar
If the vehicle has roof-rail airbags
for the driver, front outboard
passenger, and second row
outboard passengers, they are in
the ceiling above the side windows.
{Warning
If something is between an
occupant and an airbag, the
airbag might not inflate properly (Continued)
Warning (Continued)
or it might force the object into
that person causing severe injury
or even death. The path of an
inflating airbag must be kept
clear. Do not put anything
between an occupant and an
airbag, and do not attach or put
anything on the steering wheel
hub or on or near any other
airbag covering.
Do not use seat accessories that
block the inflation path of a
seat-mounted side impact airbag.
Never secure anything to the roof
of a vehicle with roof-rail airbags
by routing a rope or tie‐down
through any door or window
opening. If you do, the path of an
inflating roof-rail airbag will be
blocked.