2021 GMC SIERRA keyless entry

GMC Sierra/Sierra Denali 1500 Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-14632426) - 2021 - CRC - 11/5/20
Seats and Restraints 51
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
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 RKE transmitter (1–8). See
Remote Keyless Entry (RKE) System
Operation (Key Access) 010 or
Remote Keyless Entry (RKE) System
Operation (Keyless Access) 013. If the RKE
transmitter 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. RKE
transmitters 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
0 131.
The shift lever 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
If the saved memory seat position does not
automatically recall or recalls to the wrong
positions, the driver’s RKE transmitter
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 RKE
transmitter.
Seat Exit Memory
Seat Exit Memory is not linked to an RKE
transmitter. 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 0131.
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

GMC Sierra/Sierra Denali 1500 Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-14632426) - 2021 - CRC - 11/5/20
Instruments and Controls 133
Touch the controls on the infotainment
display to adjust the volume.
Reverse Tilt Mirror
When on, the driver, passenger, or both
driver and passenger outside mirrors will tilt
downward when the vehicle is shifted into
R (Reverse) to improve visibility of the
ground near the rear wheels. They may
move from their tilted position when the
vehicle is shifted out of R (Reverse) or
turned off. SeeReverse Tilt Mirrors 038.
Touch Off, On - Driver and Passenger, On -
Driver, or On - Passenger.
Remote Mirror Folding
When on, the outside mirrors will remotely
fold or unfold when the Remote Keyless
Entry (RKE) transmitter
QorKbutton is
pressed and held. See Folding Mirrors036.
Touch Off or On.
Lighting
Touch and the following may display:
.Vehicle Locator Lights
.Exit Lighting
.Automatic High Beam Assist Vehicle Locator Lights
This setting flashes the vehicle’s headlamps
when
Kis pressed on the Remote Keyless
Entry (RKE) transmitter.
Touch Off or On.
Exit Lighting
This setting specifies how long the
headlamps stay on after the vehicle is
turned off and exited.
Touch Off, 30 Seconds, 60 Seconds,
or 120 Seconds.
Automatic High Beam Assist
This setting specifies how the high beams
adjust based on the vehicle environment.
Touch IntelliBeam or Adaptive Headlight
System.
Power Door Locks
Touch and the following may display:
.Open Door Anti Lock Out
.Auto Door Unlock
.Delayed Door Lock Open Door Anti Lock Out
This setting prevents the driver door from
locking when the door is open. If this
setting is on, the Delayed Door Lock menu
will not be available.
Touch Off or On.
Auto Door Unlock
This setting allows selection of which doors
will automatically unlock when the vehicle is
shifted into P (Park).
Touch Off, All Doors, or Driver Door.
Delayed Door Lock
When on, this feature will delay the locking
of the doors. To override the delay, press
the power door lock switch on the door.
Touch Off or On.
Remote Lock, Unlock, and Start
Touch and the following may display:
.Remote Unlock Light Feedback
.Remote Lock Feedback
.Remote Door Unlock
.Remote Start Auto Cool Seats
.Remote Start Auto Heat Seats
.Remote Window Operation

GMC Sierra/Sierra Denali 1500 Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-14632426) - 2021 - CRC - 11/5/20
134 Instruments and Controls
.Passive Door Unlock
.Passive Door Lock
.Remote Left in Vehicle Alert
.Remote Removed from Vehicle Alert
Remote Unlock Light Feedback
When on, the exterior lamps will flash when
unlocking the vehicle with the RKE
transmitter.
Touch Off or Flash Lights.
Remote Lock Feedback
This allows selection of what type of
feedback is given when locking the vehicle
with the RKE transmitter.
Touch Off, Lights and Horn, Lights Only,
or Horn Only.
Remote Door Unlock
This allows selection of which doors will
unlock when pressing
Kon the RKE
transmitter.
Touch All Doors or Driver Door. Remote Start Auto Cool Seats
If equipped and turned on, this feature will
turn on the ventilated seats when using
remote start on warm days. See
Heated and
Ventilated Front Seats 052 and
Remote Vehicle Start 020.
Touch Off or On.
Remote Start Auto Heat Seats
If equipped and turned on, this feature will
turn on the heated seats when using remote
start on cold days. See Heated and
Ventilated Front Seats 052 and
Remote Vehicle Start 020.
If equipped with Auto Heated Steering
Wheel, this feature will turn on when the
Remote Start Auto Heated Seats turn on.
Touch Off or On.
Remote Window Operation
If equipped, this feature enables remote
operation of the windows with the RKE
transmitter. See Remote Keyless Entry (RKE)
System Operation (Key Access) 010 or
Remote Keyless Entry (RKE) System
Operation (Keyless Access) 013.
Touch Off or On. Passive Door Unlock
This allows the selection of what doors will
unlock when using the button on the driver
door to unlock the vehicle.
Touch Off, All Doors or Driver Door Only.
Passive Door Lock
This allows passive locking to be turned on
or off and selects feedback. See
Remote
Keyless Entry (RKE) System Operation (Key
Access) 010 or
Remote Keyless Entry (RKE) System
Operation (Keyless Access) 013.
Touch Off, On with Horn Chirp, or On.
Remote Left in Vehicle Alert
This feature sounds an alert when the RKE
transmitter is left in the vehicle. This menu
also enables Remote No Longer In Vehicle
Alert.
Touch Off or On.
Remote Removed from Vehicle Alert
This feature beeps the horn 3 times when
exiting a running vehicle with the
remote key.
Touch Off or On.

GMC Sierra/Sierra Denali 1500 Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-14632426) - 2021 - CRC - 11/5/20
192 Infotainment System
.Active Call View: Shows active call display
when answering a call.
Touch the controls on the infotainment
display to disable or enable.
.Privacy: Only show call alerts in the
instrument cluster.
Touch Off or On.
.Sort Contacts: Touch to sort by first or
last name.
.Re-sync Device Contacts:
This allows the device contacts to re-sync
if you are having difficulty accessing all of
the contacts on your cell phone.
.Delete All Vehicle Contacts: Touch to
delete all vehicle stored contacts.
.OnStar Phone TTY Mode: This enables
OnStar cell phone TTY mode.
Touch Disable or Enable.
Vehicle
This menu allows adjustment of different
vehicle features. SeeVehicle Personalization
0 131.
Personal
If equipped, this menu allows adjustment of
different user profile settings. See “Users”in
Using the System 0152 for information on
setting up user profiles.
The menu may contain the following:
Name
Touch to edit your user name that will be
displayed in the vehicle.
Vehicle Account Information
Touch to view the vehicle account
information and to change the account
password.
An “unverified user account” pop-up will
display until the account information
verification process has been completed on
the Internet. Check your registered e-mail
account for an activation e-mail to complete
the verification process.
Profile Picture
Touch to choose or change your profile
picture.
Profile Identifiers
Touch to have the vehicle recognize the
identifier you choose. Touch Vehicle Key 1 and/or Vehicle Key 2.
If the Remote Keyless Entry (RKE)
transmitter is lost or stolen, see your dealer.
Security
Touch to have your profile secured with
a PIN.
Touch No or Yes.
Vehicle Name
Touch to edit your vehicle name.
Vehicle Account
Touch to view the vehicle account
information and to change the account
password.
Delete Profile
Touch to remove the profile from the
vehicle.
Touch Remove or Cancel.
Teen Driver
If equipped, this allows multiple keys to be
registered for beginner drivers to encourage
safe driving habits. When the vehicle is
started with a Teen Driver key, it will
automatically activate certain safety
systems, allow setting of some features, and

GMC Sierra/Sierra Denali 1500 Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-14632426) - 2021 - CRC - 11/5/20
Infotainment System 193
limit the use of others. The Report Card will
record vehicle data about driving behavior
that can be viewed later. When the vehicle
is started with a registered key, the Driver
Information Center (DIC) displays a message
that Teen Driver is active.
To access:1. Touch Settings on the Home Page, then touch Vehicle, and then Teen Driver.
2. Create a Personal Identification Number (PIN) by choosing a four-digit PIN.
Re-enter the PIN to confirm. To change
the PIN, touch Change PIN.
The PIN is required to:
.Register or unregister keys.
.Change Teen Driver settings.
.Change or clear the Teen Driver PIN.
.Access or delete Report Card data.
Register keys to activate Teen Driver and
assign restrictions to the key:
Any vehicle key can be registered, up to a
maximum of eight keys. Label the key to
tell it apart from the other keys. For a pushbutton start system:
1. Start the engine.
2. For automatic transmissions, the vehicle must be in P (Park). For manual
transmissions, the vehicle must be
stopped with the parking brake set.
3. From the Settings menu, touch Vehicle and then Teen Driver.
4. Enter the PIN.
5. Place the Remote Keyless Entry (RKE) transmitter key you wish to register in
the transmitter pocket. The key does not
need to be the one that started the
vehicle. See Remote Keyless Entry (RKE)
System Operation (Key Access) 010 or
Remote Keyless Entry (RKE) System
Operation (Keyless Access) 013 for
transmitter pocket location.
6. From the Teen Driver menu, touch Setup Keys.
.If the transmitter key has not
previously been registered, the option
to add the key displays. Touch Setup
and a confirmation message displays.
Teen Driver restrictions will be
applied whenever this key is used to
operate the vehicle.
.If the transmitter key has already
been registered, the option to
remove the key displays. If Remove is
touched, the transmitter key is no
longer registered. A confirmation
message displays, and Teen Driver
restrictions will not be applied if this
transmitter key is used to operate
the vehicle.
In vehicles with a pushbutton start system,
if a Teen Driver and a non-Teen Driver key
are both present at start up, the vehicle will
recognize the non-Teen Driver key to start
the vehicle. The Teen Driver settings will not
be active.
For a keyed ignition system: 1. Start the engine.
2. For automatic transmissions, the vehicle must be in P (Park). For manual
transmissions, the vehicle must be
stopped with the parking brake set.
3. From the Settings menu, touch Vehicle and then Teen Driver.
4. Enter the PIN.
5. Touch Setup Keys. The system displays instructions for registering or
unregistering a key. A confirmation
message displays.

GMC Sierra/Sierra Denali 1500 Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-14632426) - 2021 - CRC - 11/5/20
Driving and Operating 231
Vehicles equipped with Keyless Access have
pushbutton starting.
The Remote Keyless Entry (RKE) transmitter
must be in the vehicle for the system to
operate. If the pushbutton start is not
working, the vehicle may be near a strong
radio antenna signal causing interference to
the Keyless Access system. SeeRemote
Keyless Entry (RKE) System Operation (Key
Access) 010 or
Remote Keyless Entry (RKE) System
Operation (Keyless Access) 013.
To shift out of P (Park), the ignition must be
on or in Service Mode, and the brake pedal
must be applied.
{Warning
Turning off the vehicle while moving may
cause loss of power assist in the brake
and steering systems and disable the
airbags. While driving, only shut the
vehicle off in an emergency.
Stopping the Engine/LOCK/OFF (No Indicator
Lights) : When the vehicle is stopped, press
ENGINE START/STOP once to turn the
engine off. If the vehicle is in P (Park), the ignition will
turn off, and Retained Accessory Power (RAP)
will remain active. See
Retained Accessory
Power (RAP) 0236.
If the vehicle is not in P (Park), the ignition
will return to ACC/ACCESSORY and display
the message SHIFT TO PARK in the Driver
Information Center (DIC). When the vehicle is
shifted into P (Park), the ignition system will
turn off.
The vehicle may have an electric steering
column lock. The lock is activated when the
ignition is turned off and driver door is
opened. A sound may be heard as the lock
actuates or releases. The steering column
lock may not release with the wheels turned
off center. If this happens, the vehicle may
not start. Move the steering wheel from left
to right while attempting to start the
vehicle. If this does not work, the vehicle
needs service.
Unless an emergency exists, do not turn the
engine off when the vehicle is moving. This
will cause a loss of power assist in the brake
and steering systems and disable the
airbags. If the vehicle must be shut off in an
emergency:
1. If the vehicle cannot be pulled over, and must be shut off while driving, press and
hold ENGINE START/STOP button for
longer than two seconds, or press twice
in five seconds.
2. Brake using a firm and steady pressure. Do not pump the brakes repeatedly. This
may deplete power assist, requiring
increased brake pedal force.
3. Shift the vehicle to N (Neutral). This can be done while the vehicle is moving.
After shifting to N (Neutral), firmly apply
the brakes and steer the vehicle to a
safe location.
4. Come to a complete stop, shift to P (Park), and make sure engine is off.
The shift lever must be in P (Park) to
turn the ignition off.
5. Set the parking brake. See Electric
Parking Brake 0247.

GMC Sierra/Sierra Denali 1500 Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-14632426) - 2021 - CRC - 11/5/20
236 Driving and Operating
Retained Accessory Power (RAP)
When the ignition is turned from on to off,
the following features (if equipped) will
continue to function for up to 10 minutes,
or until the driver door is opened. These
features will also work when the ignition is
in RUN or ACC/ACCESSORY:
.Infotainment System
.Power Windows (during RAP this
functionality will be lost when any door
is opened)
.Sunroof (during RAP this functionality will
be lost when any door is opened)
.Auxiliary Power Outlet
.Audio System
.OnStar System
Shifting Into Park
{Warning
It can be dangerous to get out of the
vehicle if the shift lever is not fully in
P (Park) with the parking brake firmly set.
The vehicle can roll. If you have left the
engine running, the vehicle can move
suddenly. You or others could be injured.(Continued)
Warning (Continued)
To be sure the vehicle will not move,
even when you are on fairly level ground,
use the steps that follow. With
four-wheel drive, if the transfer case is in
N (Neutral), the vehicle will be free to
roll, even if the shift lever is in P (Park).
Be sure the transfer case is in a drive
gear. If towing a trailer, seeDriving
Characteristics and Towing Tips 0288.
1. Hold the brake pedal down, then set the parking brake. See Electric Parking Brake
0 247.
2. Move the shift lever into the P (Park) position by pulling the shift lever toward
you and moving it up as far as it will go.
3. Be sure the transfer case (if equipped) is in a drive gear –not in N (Neutral).
4. Turn the ignition off. For Key Access, push the ignition key in, towards the
steering column and then turn the
ignition off.
5. For Key Access, remove the key and take it with you. If you can leave the vehicle
with the ignition key in your hand, the
vehicle is in P (Park). For Keyless Access, take the Remote
Keyless Entry (RKE) transmitter with you.Leaving the Vehicle with the Engine
Running
{Warning
It can be dangerous to leave the vehicle
with the engine running. The vehicle
could move suddenly if the shift lever is
not fully in P (Park) with the parking
brake firmly set.
If you have four-wheel drive and the
transfer case is in N (Neutral), the vehicle
will be free to roll, even if the shift lever
is in P (Park). So be sure the transfer case
is in a drive gear
–not in N (Neutral).
And, if you leave the vehicle with the
engine running, it could overheat and
even catch fire. You or others could be
injured. Do not leave the vehicle with the
engine running unless you have to.
If you have to leave the vehicle with the
engine running, be sure the vehicle is in
P (Park) and the parking brake is firmly set
before you leave it. After moving the shift
lever into P (Park), hold the regular brake

GMC Sierra/Sierra Denali 1500 Owner Manual (GMNA-Localizing-U.S./Cana-
da/Mexico-14632426) - 2021 - CRC - 11/5/20
Index 453
H
Halogen Bulbs . . . . . . . . . . . . . . . . . . . . . . . . . . . 350
Hazard Warning Flashers . . . . . . . . . . . . . . . . .142
HD Radio Technology . . . . . . . . . . . . . . . . . . . . 156
Head Restraints . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Head-up Display . . . . . . . . . . . . . . . . . . . . . . . . . .128
HeadlampsAiming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350
Automatic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Bulb Replacement . . . . . . . . . . . . . . . . . . . . . . 350
Daytime Running Lamps (DRL) . . . . . . . . . . 141
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Headlamps, Front Turn Signal,Sidemarker, and Parking Lamps . . . . . . 350
High-Beam On Light . . . . . . . . . . . . . . . . . . . 123
High/Low Beam Changer . . . . . . . . . . . . . . . 141
Lamps On Reminder . . . . . . . . . . . . . . . . . . . 123
Heated Rear Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Steering Wheel . . . . . . . . . . . . . . . . . . . . . . . . 100
Heated and Ventilated Front Seats . . . . . . . .52
Heated Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Heater Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204, 206
High-Beam On Light . . . . . . . . . . . . . . . . . . . . . . 123
Hill and Mountain Roads . . . . . . . . . . . . . . . . 219
Hill Descent Control (HDC) . . . . . . . . . . . . . . . 250 Hill Descent Control Light . . . . . . . . . . . . . . . . . 119
Hill Start Assist (HSA) . . . . . . . . . . . . . . . . . . . . 248
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101
How to Wear Seat Belts Properly . . . . . . . . . .55
HVAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204, 206
I
If the System Needs Service . . . . . . . . . . . . . . 175
Ignition Positions . . . . . . . . . . . . . . . . . . . 229, 230
Ignition Transmission Lock Check . . . . . . . . 347
Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Indicator
Pedestrian Ahead . . . . . . . . . . . . . . . . . . . . . . . 119
Vehicle Ahead . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Infants and Young Children, Restraints . . . . .72
Information Publication Ordering . . . . . . . . . . . . . . . . . . . 435
Infotainment System . . . . . . . . . . . . . . . . . . . . 439
Instrument Cluster . . . . . . . . . . . . . . . . . . . . . . . 106
Instrument Panel Overview . . . . . . . . . . . . . . . . 4
Interior Rearview Mirrors . . . . . . . . . . . . . . . . . 38
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . 1, 148
J
Jack Auxiliary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Jump Starting - North America . . . . . . . . . . . 391
K
Keyless Entry Remote (RKE) System . . . . . . . . . . . . . . . . 10, 13
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7, 9
L
Labeling, Tire Sidewall . . . . . . . . . . . . . . . . . . . 362
Lamps Auxiliary Roof Mounted Lamp . . . . . . . . . 144
Daytime Running (DRL) . . . . . . . . . . . . . . . . . 141
Dome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Exterior Cargo . . . . . . . . . . . . . . . . . . . . . . . . . 144
Exterior Controls . . . . . . . . . . . . . . . . . . . . . . . 139
Exterior Lamps Off Reminder . . . . . . . . . . . 141
Exterior Lighting Battery Saver . . . . . . . . 147
License Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . 352
Malfunction Indicator (CheckEngine) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
On Reminder . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Lane Change Alert (LCA) . . . . . . . . . . . . . . . . . 280
Lane Keep Assist (LKA) . . . . . . . . . . . . . . . . . . . .281
Lane Keep Assist Light . . . . . . . . . . . . . . . . . . . . 119
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . . . . . . .57
LATCH System Replacing Parts after a Crash . . . . . . . . . . . 88
LATCH, Lower Anchors and Tethers for Children . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77