2021 GMC YUKON ignition

Cadillac Escalade Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13690472) - 2021 - Insert - 5/10/21
This information replaces the information
under“Stop/Start System” found in the
Driving and Operating Section of the owner’ s
manual.
Some vehicles built on or after 6/7/2021 are
not equipped with the Stop/Start System,
see your dealer for details on a specific
vehicle.
Stop/Start System
If equipped, the Stop/Start system will shut
off the engine to help conserve fuel. It has
components designed for the increased
number of starts.
{Warning
The automatic engine Stop/Start feature
causes the engine to shut off while the
vehicle is still on. Do not exit the vehicle
before shifting to P (Park). The vehicle
may restart and move unexpectedly.
Always shift to P (Park), and then turn
the ignition off before exiting the vehicle.
Auto Engine Stop/Start
When the brakes are applied and the vehicle
is at a complete stop, the engine may turn
off. When stopped, the tachometer displays
AUTO STOP. See Tachometer. When the
brake pedal is released or the accelerator
pedal is pressed, the engine will restart.
To maintain vehicle performance, other
conditions may cause the engine to
automatically restart before the brake pedal
is released. Auto Stops may not occur and/or Auto
Starts may occur because:.The climate control settings require the
engine to be running to cool or heat the
vehicle interior.
.The vehicle battery charge is low.
.The vehicle battery has recently been
disconnected.
.Minimum vehicle speed has not been
reached since the last Auto Stop.
.The accelerator pedal is pressed.
.The engine or transmission is not at the
required operating temperature.
.The outside temperature is not in the
required operating range.
.The vehicle is in any gear other than
D (Drive). Some vehicles may maintain
Auto Stop after being shifted to P (Park).
.Certain driver modes have been selected.
See
Driver Mode Control and
Four-Wheel Drive.
Litho in U.S.A.
Part No. 85548842©2021 General Motors LLC. All Rights Reserved.
Insert to the 2021 Cadillac Escalade, Chevrolet Tahoe/Suburban, GMC Yukon/Yukon XL/Denali, Chevrolet Silverado 1500, and GMC Sierra/Sierra Denali 1500 Owner’s Manuals

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13690468) - 2021 - CRC - 5/18/21
Introduction 5
1.Electric Parking Brake 0240.
2.
gTraction Control/Electronic Stability
Control 0242.
hStop/Start Button (If Equipped). See
Stop/Start System 0229
XPark Assist Button (If Equipped). See
Assistance Systems for Parking or Backing
0 262.
ALane Keep Assist (LKA) 0275 (If
Equipped).
5Hill Descent Control (HDC) 0244 (If
Equipped).
-110V Power Outlet Enable Button
(If Equipped). See Power Outlets0100.
3. Air Vents 0208
4. Turn Signal Lever. See Turn and
Lane-Change Signals 0138.
Windshield Wiper/Washer 097.
Rear Window Wiper/Washer 098.
5. Head-Up Display (HUD) 0122 (If
Equipped). 6. Favorite Switches (Out of View). See
Steering Wheel Controls 0144.
Volume Switches (Out of View). See
Steering Wheel Controls 0144.
7. Instrument Cluster 0104.
8. Hazard Warning Flashers 0137
(Denali Only).
9. Shift Buttons. See Automatic
Transmission 0232.
Electronic Range Select (ERS). See Manual
Mode 0235.
10. Light Sensor. See Automatic Headlamp
System 0136.
11. Infotainment. See Introduction0142.
12. Instrument Panel Storage 089 (If
Equipped).
13. Hazard Warning Flashers 0137.
14. Infotainment Controls. See Overview
0 143.
15. Dual Automatic Climate Control System
0204.
16. Heated and Ventilated Front Seats 044
(If Equipped). 17. Power Outlet (12V Direct Current) (If
Equipped). See Power Outlets0100.
18. Rear Climate Control Buttons. See Rear
Climate Control System 0207.
19. USB Port 0152.
20. Wireless Charging 0101.
21. ENGINE START/STOP. See Ignition
Positions 0226.
22. Steering Wheel Controls 0144.
23. Horn 097.
24. Hood Release. See Hood0310.
25. Steering Wheel Adjustment 096.
26. Cruise Control 0251.
Adaptive Cruise Control (Advanced) 0253
(If Equipped).
Forward Collision Alert (FCA) System
0 267 (If Equipped).
Heated Steering Wheel 096 (If
Equipped).
27. Trailer Brake Control Panel (If Equipped). SeeTowing Equipment 0287.
28. Data Link Connector (DLC) (Out of View). SeeMalfunction Indicator Lamp (Check
Engine Light) 0111.

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 15
The engine will turn off during a remote
vehicle start if:
.The coolant temperature gets too high.
.The oil pressure gets low.
The remote key range may be reduced
while the vehicle is running.
Other conditions can affect the performance
of the remote key. See Remote Keyless Entry
(RKE) System 08or
Vehicle Personalization 0126.
Starting the Engine Using Remote Start
1. Press
Stwice on the remote key. The
turn signal lamps will flash. The lamps
flash to confirm the request to remote
start the vehicle has been received.
During the remote start, the doors will
be locked and the parking lamps will
remain on as long as the engine is
running.
2. The engine will shut off after 15 minutes or after the remainder of the 30 minute
total running time is used, unless you
stop the remote start before engine
running has completed or the vehicle is
turned on.
3. Press the brake pedal and turn the ignition on to drive the vehicle. Extending Engine Run Time
Remote start can be used for up to
30 minutes of total engine run time.
After two remote starts of 15 minutes,
or multiple shorter time starts totaling
30 minutes have been used, the vehicle
must be started and then turned off before
the remote start can be used again.
Canceling a Remote Start
To cancel a remote start, do one of the
following:.Press and holdSuntil the parking
lamps turn off.
.Turn on the hazard warning flashers.
.Turn the ignition on and then off.
Door Locks
{Warning
Unlocked doors can be dangerous.
.Passengers, especially children, can
easily open the doors and fall out of a
moving vehicle. The doors can be
unlocked and opened while the vehicle
is moving. The chance of being thrown
out of the vehicle in a crash is (Continued)
Warning (Continued)
increased if the doors are not locked.
So, all passengers should wear seat
belts properly and the doors should be
locked whenever the vehicle is driven.
.Young children who get into unlocked
vehicles may be unable to get out.
A child can be overcome by extreme
heat and can suffer permanent injuries
or even death from heat stroke.
Always lock the vehicle whenever
leaving it.
.Outsiders can easily enter through an
unlocked door when you slow down
or stop the vehicle. Locking the doors
can help prevent this from happening.
To lock or unlock the doors from outside the
vehicle:
.PressQorKon the remote key. See
Remote Keyless Entry (RKE) System
Operation 08.
.Use the mechanical key in the
driver door.
To lock or unlock the doors from inside the
vehicle:

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13690468) - 2021 - crc - 8/14/20
16 Keys, Doors, and Windows
.PressQorKon the power door lock
switch.
.Pulling an interior door handle will unlock
the door. Pulling the door handle again
unlatches it.
Keyless Access
The remote key must be within 1 m (3 ft) of
the trunk or door being opened or locked.
Press the button on the door handle to
open. See “Keyless Access Operation” in
Remote Keyless Entry (RKE) System
Operation 08. Free-Turning Locks
The door key lock cylinder turns freely when
either the wrong key is used, or the correct
key is not fully inserted. The free-turning
door lock feature prevents the lock from
being forced open. To reset the lock, turn it
to the vertical position with the correct key
fully inserted. Remove the key and insert it
again. If this does not reset the lock, turn
the key halfway around in the cylinder and
repeat the reset procedure.
Power Door Locks
PressQorKon the Remote Key. See
Remote Keyless Entry (RKE) System
Operation 08.
Q:Press to lock the doors. The indicator
light in the switch will illuminate when
locked.
K: Press to unlock the doors.
Security Status indicator
A light on the upper surface of the driver's
door trim is used to indicate vehicle security
status.
This light will be OFF any time the ignition
is ON, except momentarily when vehicle
doors are locking.
Solid : Indicates securing with doors closed.
Fast Flash : Indicates securing with
doors open.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13690468) - 2021 - crc - 8/14/20
Keys, Doors, and Windows 17
Slow Flash :Indicates battery conserving
secured state.
No light : Indicates unsecured state.
Delayed Locking
This feature delays the locking of the doors
until five seconds after all doors are closed.
When
Qis pressed on the power door lock
switch while the door is open, a chime will
sound three times indicating delayed locking
is active.
The doors will lock automatically
five seconds after all doors are closed. If a
door is reopened before that time, the
five-second timer will reset when all doors
are closed again.
Press
Qon the door lock switch again or
press
Qon the remote key to lock the
doors immediately.
This feature can be programmed. See
“Delayed Door Lock” underVehicle
Personalization 0126.
Automatic Door Locks
The doors will lock automatically when all
doors are closed, the ignition is on, and the
vehicle is shifted out of P (Park). If a vehicle door is unlocked, and then
opened and closed, the doors will lock either
when your foot is removed from the brake
or the vehicle speed becomes faster than
13 km/h (8 mph).
To unlock the doors:
.PressKon the power door lock switch.
.Shift the transmission into P (Park).
Automatic door locking cannot be disabled.
Automatic door unlocking can be
programmed. See Vehicle Personalization
0 126.
Lockout Protection
When locking is requested with the driver
door open and the vehicle is on or in ACC/
ACCESSORY, all the doors will lock and then
the driver door will unlock.
If the vehicle is off and locking is requested
while a door is open, when all doors are
closed the vehicle will check for remote keys
inside. If a remote key is detected and the
number of remote keys inside has not
reduced, the driver door will unlock and the
horn will sound three times. This can be manually overridden by pressing
and holding
Qon the power door lock
switch.
Safety Locks
The rear door safety locks prevent
passengers from opening the rear doors
from inside the vehicle.
The safety lock is on the inside edge of the
rear doors. To use the safety lock:
1. Move the lever down to the lock position.
2. Close the door.
3. Do the same for the other rear door.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13690468) - 2021 - crc - 8/14/20
28 Keys, Doors, and Windows
The immobilization system is disarmed
when the ignition is turned on or to ACC/
ACCESSORY and a valid remote key is
present in the vehicle.
The security light, in the instrument cluster,
comes on if there is a problem with arming
or disarming the theft-deterrent system.
The system has one or more remote keys
matched to an immobilizer control unit in
the vehicle. Only a correctly matched
remote key will start the vehicle. If the
remote key is ever damaged, you may not
be able to start your vehicle.
When trying to start the vehicle, the
security light may come on briefly.
If the engine does not start and the security
light stays on, there is a problem with the
system. Turn the ignition off and try again.
If the vehicle will not change ignition modes
(ACC/ACCESSORY, on, off), and the remote
key appears to be undamaged, try another
remote key. Or, you may try placing theremote key in the backup location. See
Remote Keyless Entry (RKE) System
Operation
08.
If the ignition modes will not change with
the other remote key or in the backup
location, the vehicle needs service. If the
ignition does change modes, the first
remote key may be faulty. See your dealer.
It is possible for the immobilizer system to
learn new or replacement remote keys. Up
to eight remote keys can be programmed
for the vehicle. To program additional
remote keys, see “Programming Remote
Keys to the Vehicle” underRemote Keyless
Entry (RKE) System Operation 08.
Do not leave the remote key or device that
disarms or deactivates the theft-deterrent
system in the vehicle.
Exterior Mirrors
Convex Mirrors
{Warning
A convex mirror can make things, like
other vehicles, look farther away than
they really are. If you cut too sharply (Continued)
Warning (Continued)
into the right lane, you could hit a
vehicle on the right. Check the inside
mirror or glance over your shoulder
before changing lanes.
The passenger side mirror is convex shaped.
A convex mirror's surface is curved so more
can be seen from the driver seat.
Power Mirrors
To adjust the mirrors: 1. Press
}or|to select the driver or
passenger side mirror. The indicator light
comes on.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13690468) - 2021 - crc - 8/14/20
Keys, Doors, and Windows 33
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.
Power Windows
{Warning
Children could be seriously injured or
killed if caught in the path of a closing
window. Never leave the remote key in a
vehicle with children. When there are (Continued)
Warning (Continued)
children in the rear seat, use the window
lockout switch to prevent operation of
the windows. SeeKeys07.
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) 0229.
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.