lock GMC SIERRA 2020 User Guide

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 4/4/19
18 Keys, Doors, and Windows
Driver Side Shown, PassengerSide Similar
Pressing the lock/unlock button will
cause all doors to lock if any of the
following occur:
. It has been more than
five seconds since the first lock/
unlock button press.
. Two lock/unlock button presses
were used to unlock all doors.
. Any vehicle door has been
opened and all doors are now
closed. Keyless Unlocking/Locking from
the Passenger Doors
When the doors are locked and the
RKE transmitter is within 1 m (3 ft)
of the door handle, pressing the
lock/unlock button on a passenger
door handle will unlock all doors.
Pressing the lock/unlock button will
cause all doors to lock if any of the
following occur:
.
The lock/unlock button was used
to unlock all doors.
. Any vehicle door has been
opened and all doors are now
closed.
Disable/Enable Keyless Unlocking
of Exterior Door Handles and
Tailgate
If equipped, keyless unlocking of the
exterior door handles and tailgate
can be disabled and enabled.
Disabling Keyless Unlocking:
With the vehicle off, press and hold
QandKon the RKE transmitter at
the same time for approximately
three seconds. The turn signal
lamps will flash four times quickly to indicate access is disabled. Using
any exterior handle to unlock the
doors or open the tailgate will cause
the turn signal lamps to flash four
times quickly, indicating access is
disabled. If disabled, disarm the
alarm system before starting the
vehicle.
Enabling Keyless Unlocking:
With the vehicle off, press and hold
QandKon the RKE transmitter at
the same time for approximately
three seconds. The turn signal
lamps will flash twice quickly to
indicate access is enabled.
Passive Locking
This feature will lock the vehicle
several seconds after all doors are
closed, if the vehicle is off and at
least one RKE transmitter has been
removed from the interior, or none
remain in the interior.
If other electronic devices interfere
with the RKE transmitter signal, the
vehicle may not detect the RKE
transmitter inside the vehicle.
If passive locking is enabled, the
doors may lock with the RKE

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 4/4/19
Keys, Doors, and Windows 19
transmitter inside the vehicle. Do
not leave the RKE transmitter in an
unattended vehicle.
To customize the doors to
automatically lock when exiting the
vehicle, see“Remote Lock, Unlock,
Start” under Vehicle Personalization
0 157.
Temporary Disable of Passive
Locking
Temporarily disable passive locking
by pressing and holding
Kon the
interior door switch with a door open
for at least four seconds, or until
three chimes are heard. Passive
locking will then remain disabled
until
Qon the interior door is
pressed, or until the vehicle is
turned on.
Remote Left in Vehicle Alert
When the vehicle is turned off and
an RKE transmitter is left in the
vehicle, the horn will chirp three
times after all doors are closed. To
turn on or off see Vehicle
Personalization 0157. Remote No Longer in Vehicle Alert
If the vehicle is on with a door open
and then all doors are closed, the
vehicle will check for RKE
transmitters inside. If an RKE
transmitter is not detected, the
Driver Information Center (DIC) will
display NO REMOTE DETECTED
and the horn will chirp three times.
This occurs only once each time the
vehicle is driven. To turn on or off
see
Vehicle Personalization 0157.
Key Access
To access a vehicle with a dead
transmitter battery, see Door Locks
0 25.Programming Transmitters to
the Vehicle
Only RKE transmitters programmed
to the vehicle will work. If a
transmitter is lost or stolen, a
replacement can be purchased and
programmed through your dealer.
The vehicle can be reprogrammed
so that lost or stolen transmitters no longer work. Each vehicle can have
up to eight transmitters matched
to it.
Programming with Recognized
Transmitters
A new transmitter can be
programmed to the vehicle when
there are two recognized
transmitters.
To program, the vehicle must be off
and all transmitters, both currently
recognized and new, must be
with you.
1. Remove the key from a recognized transmitter.
2. Place the two recognized transmitters in the cupholder or
on the passenger seat.
3. Insert the vehicle key into the key lock cylinder on the driver
door handle. Then turn the key
counterclockwise, to the unlock
position, five times within
10 seconds.
The DIC displays READY FOR
REMOTE#3, 4, 5 ETC.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 4/4/19
20 Keys, Doors, and Windows
Transmitter Pocket without BucketSeats (Lower Compartment)Transmitter Pocket with Bucket Seats
4. Place the new transmitter in the transmitter pocket/insert.
5. Press ENGINE START/STOP. When the transmitter is
learned, the DIC display will
show that it is ready to program
the next transmitter.
6. Remove the transmitter from the transmitter pocket and
press
KorQon the
transmitter.
To program additional
transmitters, repeat Steps 4–6. When all additional transmitters
are programmed, press and
hold ENGINE START/STOP for
approximately 12 seconds to
exit programming mode.
7. Return the key back into the transmitter.
Programming without Recognized
Transmitters
If two currently recognized
transmitters are not available, follow
this procedure to program up to
eight transmitters. This feature is
not available in Canada. This
procedure will take approximately
30 minutes to complete. The vehicle
must be off and all transmitters to
be programmed must be with you. 1. Remove the vehicle key from the transmitter.
2. Insert the vehicle key into the key lock cylinder on the driver
door handle; then turn the key
counterclockwise, to the unlock
position, five times within
10 seconds.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 4/4/19
24 Keys, Doors, and Windows
Remote Vehicle Start
If equipped with the remote start
feature, the climate control system
will come on when the vehicle is
started remotely, depending on the
outside temperature.
The rear defog and heated and
ventilated seats, if equipped, may
also come on. SeeHeated and
Ventilated Front Seats 061 and
Vehicle Personalization 0157.
If equipped, the automatic heated
steering wheel may also come on.
See Heated Steering Wheel 0120.
Laws in some communities may
restrict the use of remote starters.
Check local regulations for any
requirements on remote starting of
vehicles.
Do not use remote start if the
vehicle is low on fuel. The vehicle
may run out of fuel.
The vehicle cannot be remote
started if:
. The RKE transmitter is inside
the vehicle or if the key is in the
ignition. .
The hood is not closed.
. There is an emission control
system malfunction and the lamp
is on.
. The ignition is in any mode other
than off.
. The hazard warning flashers
are on.
. Two remote starts or a remote
start with an extension have
been used.
. The vehicle is not in P (Park).
The engine will turn off during a
remote vehicle start if:
. The coolant temperature gets
too high.
. The oil pressure gets low.
The RKE transmitter range may be
reduced while the vehicle is running.
Other conditions can affect the
performance of the transmitter. See
Remote Keyless Entry (RKE)
System 013. Starting the Engine Using Remote
Start
1. Press and releaseQ.
2. Immediately press and hold
/
until the turn signal lamps flash
or for at least four seconds.
When the vehicle starts, the
parking lamps will turn on. The
doors will be locked and the
climate control system may
come on.
The engine will continue to run
for 15 minutes. After
30 seconds, repeat
Steps 1 and 2 for a 15-minute
time extension.
Turn the ignition on to operate the
vehicle.
Extending Engine Run Time
The engine run time can be
extended by 15 minutes, for a total
of 30 minutes, if during the first
15 minutes Steps 1 and 2 are
repeated while the engine is still
running. An extension can be
requested 30 seconds after starting.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 4/4/19
Keys, Doors, and Windows 25
A maximum of two remote starts,
or a single start with an extension,
is allowed between ignition cycles.
The vehicle's ignition must be
turned on and then back off to use
remote start again.
Canceling a Remote Start
To cancel a remote start, do one of
the following:
.Press and hold
/until 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
(Continued)
Warning (Continued)
can be unlocked and
opened while the vehicle is
moving. The chance of
being thrown out of the
vehicle in a crash is
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
(Continued)
Warning (Continued)
the vehicle. Locking the
doors can help prevent this
from happening.
There are several ways to lock and
unlock the vehicle.
From outside:
. Use the Remote Keyless Entry
(RKE) transmitter.
. Use Keyless Access,
if equipped.
. Use the key in the driver door or
the passenger door, if equipped.
From inside, use the power door
locks or the manual door locks. To
lock the door with the manual door
locks, push down on the manual
lock knob.
From inside, pull the door handle
once to unlock the door. Pull the
handle again to open the door.
See Vehicle Alarm System 037.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 4/4/19
26 Keys, Doors, and Windows
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
If equipped with power door locks.
Q:Press to lock the doors.
K:Press to unlock the doors.
Delayed Locking
If equipped, this feature delays the
locking of the doors until
five seconds after all doors are
closed.
Delayed locking can only be turned
on when the Open Door
Anti-Lockout feature has been
turned off.
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 RKE
transmitter to lock the doors
immediately.
This feature can be programmed.
See Vehicle Personalization 0157.
Automatic Door Locks
If equipped, 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:
.
Press
Kon the power door lock
switch.
. Shift the transmission into
P (Park).

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
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Keys, Doors, and Windows 27
Automatic door locking cannot be
disabled. Automatic door unlocking
can be programmed. SeeVehicle
Personalization 0157.
Lockout Protection
If equipped, the ignition is on or in
ACC/ACCESSORY and the power
door lock switch is pressed with the
driver door open, all the doors will
lock and only 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 to the Keyless
Access function (if equipped). If an
RKE transmitter is detected and the
number of RKE transmitters inside
has not reduced, the driver door will
unlock and the horn will chirp three
times.
Lockout Protection can be manually
overridden with the driver door open
by pressing and holding
Qon the
power door lock switch. Open Door Anti-Lockout
If equipped, the Open Door
Anti-Lockout is turned on and the
vehicle is off, the driver door is
open, and locking is requested, all
the doors will lock and the driver
door will unlock. The Open Door
Anti-Lockout feature can be turned
on or off. See
Vehicle
Personalization 0157.
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.
To open a rear door when the safety
lock is on:
1. Unlock the door by activating the inside handle, by pressing
the power door unlock switch,
or by using the Remote
Keyless Entry (RKE)
transmitter.
2. Open the door from the outside.
When the safety lock is enabled,
adults and older children will not be
able to open the rear door from the
inside. Cancel the safety locks to
enable the doors to open from the
inside.
To cancel the safety lock:

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 4/4/19
28 Keys, Doors, and Windows
1. Unlock the door and open itfrom the outside.
2. Move the lever up to unlock. Do the same for the other door.Doors
Tailgate
Manual Tailgate
{Warning
It is extremely dangerous to ride
on the tailgate, even when the
vehicle is operated at low speeds.
People riding on the tailgate can
easily lose their balance and fall
in response to vehicle
maneuvers. Falling from a moving
vehicle may result in serious
injuries or death. Do not allow
people to ride on the tailgate. Be
sure everyone in your vehicle is in
a seat and using a seat belt
properly.
Use the key to unlock the tailgate.
Open the tailgate by lifting up on its
handle while pulling the
tailgate down.
To shut the tailgate, firmly push it
upward until it latches. After closing the tailgate, pull it back
to be sure it is latched securely.
Some tailgates have an electric
latch. If the battery is disconnected
or has low voltage, the tailgate will
not open. The tailgate will resume
operation when the battery is
reconnected or recharged.Power Release Tailgate
{Warning
Make sure there is no one in the
way of the power tailgate as it is
opening and closing, and keep
hands away from the tailgate
hinges when in use. You or others
could be injured if caught in the
path of the power tailgate or
tailgate hinges.
Caution
To avoid damage to the tailgate,
make sure the area behind the
tailgate is clear before opening it.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
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Keys, Doors, and Windows 29
In the case of a dead battery, the
tailgate can be opened manually.
Contact your dealer or Roadside
Assistance.
If equipped, to lock or unlock the
tailgate, use the RKE transmitter or
the key. SeeRemote Keyless Entry
(RKE) System Operation (Key
Access) 013 or
Remote Keyless Entry (RKE)
System Operation (Keyless Access)
0 15.
The vehicle must be in P (Park).
To open the tailgate:
. Press
xtwice quickly on the
RKE transmitter until the tailgate
moves.
. Press5on the center stack.
.
Press the touch pad on the
tailgate handle after unlocking all
doors. Use the top of the tailgate
to pull against if assistance is
required. If equipped with
Keyless Access, a locked
tailgate can be opened if the
RKE transmitter is within
1 m (3 ft).
To close the tailgate, firmly push it
upward until it latches. Pull it back
to be sure it is latched securely.
Power Tailgate
{Warning
Make sure there is no one in the
way of the power tailgate as it is
opening and closing, and keep
hands away from the tailgate
hinges when in use. You or others
could be injured if caught in the
path of the power tailgate or
tailgate hinges.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 4/4/19
30 Keys, Doors, and Windows
Caution
To avoid damage to the tailgate,
make sure the area behind the
tailgate is clear before opening it.
If equipped with a power open/close
tailgate, the tailgate can be opened
or closed in several ways. To open
the tailgate, do one of the following:
. Press
xtwice quickly on the
RKE transmitter until the tailgate
moves. See Remote Keyless
Entry (RKE) System Operation
(Key Access) 013 or
Remote Keyless Entry (RKE)
System Operation (Keyless
Access) 015. If equipped with
Keyless Access, a locked
tailgate can be opened if the
RKE transmitter is within
1 m (3 ft).. Press5on the center stack.
.
Press the touch pad on the
tailgate handle after unlocking all
doors.
To close the tailgate, do one of the
following:
. Press
xon the RKE
transmitter once, then quickly
press and hold
xuntil the
tailgate completely closes. If
x
is released prior to it being fully
closed, the tailgate will reopen.
. Press and hold
5on the
center stack until the tailgate is
fully closed. If
5is released
prior to the tailgate being fully
closed, it will reopen. A chime
will sound when the tailgate is
fully closed.
. Press the touch pad on the
tailgate handle.
A chime sounds and the taillamps
flash during the closing operation.
If the warning chime is not
functioning, the tailgate will not