2021 GMC YUKON seat memory

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13690468) - 2021 - crc - 8/14/20
8 Keys, Doors, and Windows
The mechanical key inside the remote key is
used for the driver door and glove box.
To remove the mechanical key, press the
button on the side of the remote key near
the bottom, and pull the mechanical key
out. Never pull the mechanical key out
without pressing the button.
The mechanical key may have a bar-coded
key tag that the dealer or qualified
locksmith can use to make new keys. store
this information in a safe place, not in the
vehicle.
See your dealer if a replacement key or
additional key is needed.If it becomes difficult to turn a key, inspect
the key blade for debris. Periodically clean
with a brush or pick.
With an active OnStar or connected service
plan, an OnStar Advisor may remotely
unlock the vehicle. See
OnStar Overview
0 410.
If locked out of the vehicle, see Roadside
Assistance Program 0402.
If equipped with memory seats, remote keys
1 and 2 are linked to seating positions of
memory 1 or 2. See Memory Seats041.
Remote Keyless Entry (RKE)
System
See Radio Frequency Statement 0407.
If there is a decrease in the remote key
operating range:
.Check the distance. The remote key may
be too far from the vehicle.
.Check the location. Other vehicles or
objects may be blocking the signal.
.Check the remote key’s battery. See
“Battery Replacement” later in this
section.
.If the remote key is still not working
correctly, see your dealer or a qualified
technician for service.
Remote Keyless Entry (RKE)
System Operation
The Keyless Access system allows for vehicle
entry when the remote key is within 1 m
(3 ft). See “Keyless Access Operation” later
in this section.
The remote key functions may work up to
60 m (197 ft) away from the vehicle.
Other conditions can affect the performance
of the remote key. See Remote Keyless Entry
(RKE) System 08.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13690468) - 2021 - crc - 8/14/20
Keys, Doors, and Windows 9
Q:Press to lock all doors.
If enabled, the turn signal lamps flash once
on the second press to indicate locking has
occurred. If enabled, the horn chirps when
Qis pressed again within three seconds. See
Vehicle Personalization 0126.
Pressing
Qarms the alarm system. See
Vehicle Alarm System 025.
If equipped with auto mirror folding,
pressing and holding
Qfor one second will
fold the mirrors, if enabled. See Vehicle
Personalization 0126.
K:Press once to unlock only the driver
door. If
Kis pressed again within
three seconds, all remaining doors unlock.
The interior lamps may come on and stay
on for 20 seconds or until the ignition is
turned on.
If enabled, the turn signal lamps flash twice
to indicate unlocking has occurred.
If enabled, the exterior lamps may turn on.
See Vehicle Personalization 0126.
Pressing
Kon the remote key disarms the
alarm system. See Vehicle Alarm System
0 25. If equipped with auto mirror folding,
pressing and holding
Kfor one second will
unfold the mirrors, if enabled. See Vehicle
Personalization 0126.
Press and hold
Kuntil the windows fully
open, if remote window operation is
enabled. See Vehicle Personalization 0126.
b:Press twice to open or close the
liftgate. Press once to stop the liftgate from
moving.
c: Press twice to open the liftglass.
7:Press and release to initiate vehicle
locate. The turn signal lamps flash and the
horn sounds three times.
Press and hold
7for more than
three seconds to activate the panic alarm.
The turn signal lamps flash and the horn
sounds repeatedly for 30 seconds. The alarm
turns off when the ignition is turned on or
7is pressed again. The ignition must be off
for the panic alarm to work.
/: To remote start the vehicle, double
press
/from outside the vehicle using the
remote key. The vehicle cannot be started if
a remote key is left inside the vehicle. See
Remote Vehicle Start 014.
Keyless Access Operation
The Keyless Access system allows for doors
and the liftgate to be accessed without
removing the remote key from your pocket,
purse, briefcase, etc. The remote key must
be within 1 m (3 ft) of the liftgate or door
being opened. If the vehicle has this feature,
there will be a button on the outside door
handles.
Keyless Access can be programmed to
unlock all doors on the first lock/unlock
press from the driver door. See Vehicle
Personalization 0126.
If equipped with memory seats, remote keys
1 and 2 are linked to seating positions of
memory 1 or 2. See Memory Seats041.
Keyless Unlocking/Locking from the
Driver Door
When the doors are locked and the remote
key is within 1 m (3 ft) of the door handle,
pressing the lock/unlock button on the
driver door handle will unlock the driver
door. If the lock/unlock button is pressed
again within five seconds, all passenger
doors and the liftgate will unlock.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13690468) - 2021 - crc - 8/14/20
Keys, Doors, and Windows 29
2. Press the arrows on the control pad tomove the mirror up, down, right, or left.
3. Adjust the outside mirror so that the side of the vehicle and the area behind
are seen.
4. Press either
}or|again to deselect
the mirror. The indicator light goes off.
Turn Signal Indicator
If equipped, the mirror has turn signal
indicator lights, which flash in the direction
of the turn or lane change.
Puddle Lamps
If equipped, puddle lamps project light from
the bottom of the mirror to the area of
ground below the driver and passenger
doors. See Entry Lighting 0140 and
Exit Lighting 0140.
Memory Mirrors
The vehicle may have memory mirrors. See
Memory Seats 041.
Lane Change Alert (LCA)
The vehicle may have LCA. See Lane Change
Alert (LCA) 0272.
Folding Mirrors
Manual Folding
Fold the mirrors inward to prevent damage
when going through an automatic car wash.
To fold, pull the mirror toward the vehicle.
Push the mirror outward, to return to its
original position.
Power Folding
To adjust power folding mirrors, if equipped:
1. Press
{to fold the mirrors inward.
2. Press
{again to return the mirrors to
the driving position. The outside mirrors may automatically
unfold when the vehicle is driven above
20 km/h (12 mph), but may be folded with
the power folding mirror switch. If the
vehicle speed is driven above 40 km/h
(25 mph), they may automatically unfold
and may not be refolded with the power
folding mirror switch.
Resetting the Power Folding Mirrors
Reset the power folding mirrors if:
.The mirrors are accidentally obstructed
while folding.
.They are accidentally manually folded/
unfolded.
.The mirrors do not stay in the unfolded
position.
.The mirrors vibrate at normal driving
speeds.
Fold and unfold the mirrors one time using
the mirror controls to reset them to their
normal position. A noise may be heard
during the resetting of the power folding
mirrors. This sound is normal after a manual
folding operation.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13690468) - 2021 - crc - 8/14/20
30 Keys, Doors, and Windows
Remote Mirror Folding
If equipped with power folding mirrors and
the mirrors have been folded with the
power folding mirror switch, they may not
be unfolded by use of remote key.
If equipped with power folding mirrors and
the mirrors have not been folded with the
power folding mirror switch and the vehicle
is in P (Park), they may be automatically
folded/unfolded as follows:1. If doors are locked by pressing
Hon the
remote key, the mirrors will fold.
If doors are unlocked by pressing
Ion
the remote key, the mirrors will unfold.
See Remote Keyless Entry (RKE) System
Operation 08.
2. If doors are locked by pressing the door handle button, the mirrors will fold.
If doors are unlocked by pressing the
door handle button, the mirrors will
unfold. See “Keyless Unlocking/Locking
from the Driver Door” inRemote Keyless
Entry (RKE) System Operation 08.
3. If passive locking is enabled and doors are locked by that feature, the mirrors
will fold. See “Passive Locking” inRemote
Keyless Entry (RKE) System Operation
0 8.
Heated Mirrors
K:Press to heat the mirrors.
See “Rear Window Defogger” underDual
Automatic Climate Control System 0204.
Automatic Dimming Mirror
If equipped, the driver outside mirror
automatically adjusts for the glare of the
headlamps from behind. This feature comes
on when the vehicle is started.
Reverse Tilt Mirrors
If equipped with reverse tilt mirrors and
memory seats, the passenger and/or driver
mirror tilts to a preselected position when
the vehicle is in R (Reverse). This allows the
curb to be seen when parallel parking.
The mirror(s) may move from their tilted
position when:
.The vehicle is shifted out of R (Reverse),
or remains in R (Reverse) for about
30 seconds.
.The vehicle is turned off.
.The vehicle is driven in R (Reverse) above
a set speed.
To turn this feature on or off, see Vehicle
Personalization 0126.
Interior Mirrors
Interior Rearview Mirrors
Adjust the rearview mirror for a clear view
of the area behind the 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 of the
headlamps from behind.
Automatic Dimming Rearview
Mirror
If equipped, automatic dimming reduces the
glare of headlamps from behind. The
dimming feature comes on when 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.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13690468) - 2021 - crc - 8/14/20
Seats and Restraints 37
Seats and Restraints
Head Restraints
Head Restraints . . . . . . . . . . . . . . . . . . . . . . . . . 37
Front Seats
Power Seat Adjustment . . . . . . . . . . . . . . . . 40
Lumbar Adjustment . . . . . . . . . . . . . . . . . . . . 40
Reclining Seatbacks . . . . . . . . . . . . . . . . . . . . . 41
Memory Seats . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Heated and Ventilated Front Seats . . . . . 44
Rear Seats
Rear Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Heated Rear Seats . . . . . . . . . . . . . . . . . . . . . . 45
Second Row Seats . . . . . . . . . . . . . . . . . . . . . . 46
Third Row Seats . . . . . . . . . . . . . . . . . . . . . . . . 50
Seat Belts
Seat Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
How to Wear Seat Belts Properly . . . . . . 54
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . . . . 56
Seat Belt Use During Pregnancy . . . . . . . . 59
Seat Belt Extender . . . . . . . . . . . . . . . . . . . . . . 59
Safety System Check . . . . . . . . . . . . . . . . . . . 59
Seat Belt Care . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Replacing Seat Belt System Parts after aCrash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Airbag System
Airbag System . . . . . . . . . . . . . . . . . . . . . . . . . 60 Where Are the Airbags? . . . . . . . . . . . . . . . . 62
When Should an Airbag Inflate? . . . . . . . . 63
What Makes an Airbag Inflate? . . . . . . . . 64
How Does an Airbag Restrain? . . . . . . . . . 64
What Will You See after an Airbag
Inflates? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Passenger Sensing System . . . . . . . . . . . . . 66
Servicing the Airbag-Equipped Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Adding Equipment to the Airbag-Equipped Vehicle . . . . . . . . . . . . . . 69
Airbag System Check . . . . . . . . . . . . . . . . . . . 70
Replacing Airbag System Parts after a Crash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Child Restraints
Older Children . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Infants and Young Children . . . . . . . . . . . . . 72
Child Restraint Systems . . . . . . . . . . . . . . . . 74
Where to Put the Restraint . . . . . . . . . . . . . 76
Lower Anchors and Tethers for Children(LATCH System) . . . . . . . . . . . . . . . . . . . . . . . 77
Replacing LATCH System Parts After a Crash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Securing Child Restraints (With the Seat Belt in the Rear Seat) . . . . . . . . . . . . . . . . 84
Securing Child Restraints (With the Seat Belt in the Front Passenger Seat) . . . . . 86
Securing Child Restraints (With the Seat Belt in the Center Front Seat) . . . . . . . . 88
Head Restraints
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.
If your vehicle has rear head restraints
that fold down, always return them to
the full upright position whenever an
occupant is seated in the seat.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13690468) - 2021 - crc - 8/14/20
Seats and Restraints 41
Reclining Seatbacks
To recline 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 seat belts
cannot do their job.(Continued)
Warning (Continued)
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.
For proper protection when the vehicle is
in motion, have the seatback upright.
Then sit well back in the seat and wear
the seat belt properly.
Do not have a seatback reclined if the
vehicle is moving.
Memory Seats
If equipped, memory seats allow two drivers
to save and recall their unique seat positions
for driving the vehicle, and a shared exit
position for getting out of the vehicle. Other
feature positions may also be saved, such as
power mirrors and power steering wheel,
if equipped. Memory positions are linked to
remote key 1 or 2 for automatic memory
recalls.
Before saving, adjust all available memory
feature positions. Turn the vehicle on and
then press and release SET; a beep will
sound. Then immediately press and hold 1,

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13690468) - 2021 - crc - 8/14/20
42 Seats and Restraints
2, orB(Exit) until two beeps sound. To
manually recall these positions, press and
hold 1, 2, or
Buntil the saved position is
reached. Follow the instructions under
“Saving Memory Positions.”
The vehicle identifies the current driver’s
remote key number (1–8). See Remote
Keyless Entry (RKE) System Operation 08.
Only remote keys 1 and 2 can be used for
automatic memory recalls. A Driver
Information Center (DIC) welcome message
indicating the remote key number may
display for the first few ignition cycles
following a remote key change. For Seat
Entry Memory to work properly, save the
positions to the memory button (1 or 2)
matching the remote key number displayed
in the DIC welcome message. Carry the
linked remote key when entering the
vehicle.
Vehicle Personalization Settings
.To have the Seat Entry Memory
movement begin when the vehicle is
started, select the Settings menu, then
Vehicle, then Seating Position, and then
Seat Entry Memory. Select On or Off. See
“Seat Entry Memory” later in this section.
.To begin Seat Exit Memory movement
when the vehicle is turned off and the
driver door is opened, or when the vehicle
is turned off with the driver door already
opened, select the Settings menu, then
Vehicle, then Seating Position, and then
Seat Exit Memory. Select On or Off. See
“Seat Exit Memory”later in this section.
.SeeVehicle Personalization 0126 for
additional setting information.
Identifying Driver Number
To identify the driver number: 1. Move your remote key away from the vehicle.
2. Start the vehicle with another remote key. The DIC should display the driver
number for the other remote key. Turn
the vehicle off and remove the remote
key from the vehicle.
3. Start the vehicle with the initial remote key. The DIC should display the driver
number of your remote key.
Saving Memory Positions
Read these instructions completely before
saving memory positions.
To save preferred driving positions 1 and 2: 1. Turn the vehicle on or to ACC/
ACCESSORY with remote key 1 or 2.
A DIC welcome message may indicate
driver number 1 or 2.
2. Adjust all available memory features to the desired driving position.
3. Press and release SET; a beep will sound.
4. Immediately press and hold the 1 or 2 memory button matching the above
DIC welcome message until two beeps
sound.
If too much time passes between
releasing SET and pressing 1, the
memory position will not be saved and
two beeps will not sound. Repeat
Steps 3 and 4.
1 or 2 corresponds to the driver number.
See “Identifying Driver Number”
previously in this section.
5. Repeat Steps 1–4 for a second driver using 1 or 2. Remote keys 3–8 will not
save memory positions.
To save the position for
Band Seat Exit
Memory features, repeat Steps 1–4 using
B. This saves the position for getting out
of the vehicle.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13690468) - 2021 - crc - 8/14/20
Seats and Restraints 43
Save preferred memory feature positions to
both 1 and 2 if you are the only driver.
Manually Recalling Memory Positions
Press and hold 1, 2, or
Bto recall the
previously saved memory positions if you
are driver 1 or 2 identified in the DIC
welcome message.
To stop Manual Memory recall movement,
release 1, 2, or
Bor press any of the
following controls:
.Power seat
.Memory SET
.Power mirror, with the driver or
passenger side mirror selected
.Power steering wheel, if equipped
Manual Memory recall movement for 1, 2,
or
Bbuttons may be initiated and may
complete to the saved memory position if
the vehicle is in or out of P (Park).
Seat Entry Memory
The vehicle identifies the number of the
current driver’s remote key (1–8). See
Remote Keyless Entry (RKE) System
Operation 08. If the remote key is 1 or 2,
and Seat Entry Memory is enabled in vehicle
personalization, the positions saved to the same memory button number 1 or 2 are
automatically recalled when the vehicle is
turned on, or turned from off to ACC/
ACCESSORY. Remote keys 3–8 will not
provide automatic memory recalls.
To turn Seat Entry Memory on or off, see
“Vehicle Personalization Settings”
previously
in this section and Vehicle Personalization
0 126.
The vehicle must be in P (Park) to start Seat
Entry Memory. Seat Entry Memory recall
will complete if the vehicle is shifted out of
P (Park) prior to reaching the saved memory
position.
To stop Seat Entry Memory recall
movement, turn the vehicle off or press any
of the following controls:.Power seat
.Memory SET, 1, 2, orB
.Power mirror, with the driver or
passenger side mirror selected
.Power steering wheel, if equipped
If the saved memory seat position does not
automatically recall or recalls to the wrong
positions, the driver’s remote key number (1
or 2) may not match the memory button number that positions were saved to. Try
storing the position to the other memory
button or try the other remote key.
Seat Exit Memory
Seat Exit Memory is not linked to an remote
key. The position saved to
Bis used for all
drivers. To turn Seat Exit Memory on or off,
see "Vehicle Personalization Settings"
previously in this section and Vehicle
Personalization 0126.
If turned on, the position saved to
Bis
automatically recalled 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 Seat Exit Memory movement, press
any of the following memory controls:
.Power seat
.Memory SET, 1, 2, orB
.Power mirror, with the driver or
passenger side mirror selected
.Power steering wheel, if equipped