2021 BUICK ENCORE ECU

Buick Encore Owner Manual (GMNA-Localizing-U.S./Canada-14607636) -
2021 - CRC - 8/18/20
6 Keys, Doors, and Windows
Keys, Doors, and
Windows
Keys and Locks
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Remote Keyless Entry (RKE) System . . . . . 7
Remote Keyless Entry (RKE) SystemOperation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Remote Vehicle Start . . . . . . . . . . . . . . . . . . . 13
Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Power Door Locks . . . . . . . . . . . . . . . . . . . . . . . 15
Delayed Locking . . . . . . . . . . . . . . . . . . . . . . . . 15
Automatic Door Locks . . . . . . . . . . . . . . . . . . 16
Lockout Protection . . . . . . . . . . . . . . . . . . . . . . 16
Safety Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Doors
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Vehicle Security
Vehicle Security . . . . . . . . . . . . . . . . . . . . . . . . 18
Vehicle Alarm System . . . . . . . . . . . . . . . . . . 18
Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Immobilizer Operation . . . . . . . . . . . . . . . . . . 19
Exterior Mirrors
Convex Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . 19
Power Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Folding Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . 20
Heated Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . 20
Interior Mirrors
Interior Rearview Mirrors . . . . . . . . . . . . . . . 20
Manual Rearview Mirror . . . . . . . . . . . . . . . . 20
Automatic Dimming Rearview Mirror . . . 20
Windows
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Power Windows . . . . . . . . . . . . . . . . . . . . . . . . 21
Sun Visors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Roof
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Keys and Locks
Keys
{Warning
Leaving children in a vehicle with a
Remote Keyless Entry (RKE) transmitter is
dangerous and children or others could
be seriously injured or killed. They could
operate the power windows or other
controls or make the vehicle move. The
windows will function with the RKE
transmitter in the vehicle, and children or
others could be caught in the path of a
closing window. Do not leave children in
a vehicle with an RKE transmitter.

Buick Encore Owner Manual (GMNA-Localizing-U.S./Canada-14607636) -
2021 - CRC - 8/18/20
Keys, Doors, and Windows 11
2. Insert the vehicle key of the transmitterinto the key lock cylinder on the outside
of the driver door and turn the key to
the unlock position five times within
10 seconds.
The DIC displays REMOTE LEARN
PENDING, PLEASE WAIT.
3. Wait for 10 minutes until the DIC displays PRESS ENGINE START BUTTON TO
LEARN and then press ENGINE
START/STOP.
The DIC will again show REMOTE LEARN
PENDING, PLEASE WAIT.
4. Repeat Step 2 two additional times. After the third time, all previously known
transmitters will no longer work with the
vehicle. Remaining transmitters can be
relearned during the next steps.
The DIC display should now show READY
FOR REMOTE # 1.
5. Place the new transmitter in the frontcupholder.
6. Press ENGINE START/STOP. When the transmitter is learned, the DIC will show
that it is ready to program the next
transmitter.
7. Return the key back into the transmitter.
8. Remove the transmitter from the cupholder and press
K.
To program additional transmitters,
repeat Steps 4–6.
When all additional transmitters are
programmed, press and hold ENGINE
START/STOP for 10 seconds to exit
programming mode.
Starting the Vehicle with a Low
Transmitter Battery
Note that, for improved vehicle security, the
RKE transmitter is equipped with a motion
sensor. When starting the vehicle, if the RKE
transmitter has been idle for a while, move
the RKE transmitter slightly and try starting
the vehicle.
When starting the vehicle, if the RKE
transmitter battery is depleted or there is
signal interference, the DIC may display NO
REMOTE DETECTED, REPLACE BATTERY IN
REMOTE KEY, or NO REMOTE DETECTED
PLACE KEY IN KEY POCKET THEN START YOUR
VEHICLE. If any of these messages appear on
the DIC, follow the steps below.

Buick Encore Owner Manual (GMNA-Localizing-U.S./Canada-14607636) -
2021 - CRC - 8/18/20
18 Keys, Doors, and Windows
Vehicle Security
This vehicle has theft-deterrent features;
however, they do not make the vehicle
impossible to steal.
Vehicle Alarm System
If equipped with an anti-theft alarm system,
the indicator light, on the instrument panel
near the windshield, shows the status of the
system.
Off :Alarm system is disarmed.
On Solid : Vehicle is secured during the
delay to arm the system.
Fast Flast : Vehicle is unsecured. A door, the
liftgate, or the hood is open. Slow Flash :
Alarm system is armed.
Arming the Alarm System
1. Turn off the vehicle.
2. Lock the vehicle in one of two ways:
.Use the RKE transmitter.
.With a door open, pressQon the
interior of the door.
3. After 30 seconds the alarm system will arm, and the indicator light will begin to
slowly flash indicating the alarm system
is operating. Pressing
Qon the RKE
transmitter a second time will bypass
the 30-second delay and immediately
arm the alarm system.
The vehicle alarm system will not arm if the
doors are locked with the key.
If any door or the hood is opened without
first unlocking with the RKE transmitter, the
horn will chirp and the lights will flash to
indicate pre-alarm. If the vehicle is not
started, or the door is not unlocked by
pressing
Kon the RKE transmitter during
the 10-second pre-alarm, the alarm will be
activated. The alarm will also be activated if any door
or the the hood is opened without first
disarming the system. When the alarm is
activated, the turn signals flash and the
horn sounds for about 30 seconds. The
alarm system will then re-arm to monitor
for the next unauthorized event.
Disarming the Alarm System
To disarm the alarm system or turn off the
alarm if it has been activated:
.PressKon the RKE transmitter.
.Start the vehicle.
Avoid setting off the alarm by accident:
.Lock the vehicle after all occupants have
exited and all doors are closed.
.Always unlock the vehicle with the RKE
transmitter.
Unlocking the driver door with the key will
not disarm the system or turn off the alarm.
How to Detect a Tamper Condition
IfKis pressed and the horn chirps and the
lights flash three times, an attempted
break-in has occurred while the system was
armed.

Buick Encore Owner Manual (GMNA-Localizing-U.S./Canada-14607636) -
2021 - CRC - 8/18/20
Keys, Doors, and Windows 19
Immobilizer
SeeRadio Frequency Statement 0290.
Immobilizer Operation
This vehicle has a passive theft-deterrent
system.
The system does not have to be manually
armed or disarmed.
The vehicle is automatically immobilized
when the transmitter leaves the vehicle.
The immobilization system is disarmed
when ENGINE START/STOP is pressed and a
valid transmitter is found in the vehicle.
The security light in the instrument cluster
comes on when there is a problem with
arming or disarming the theft-deterrent
system.
The system has one or more transmitters
matched to an immobilizer control unit in
your vehicle. Only a correctly matched transmitter will start the vehicle. If the
transmitter is ever damaged, you may not
be able to start your vehicle.
When trying to start the vehicle, the
security light comes on briefly when the
ignition is turned on.
If the engine does not start and the security
light stays on, there is a problem with the
system. Turn the vehicle off and try again.
If the vehicle will not change ignition modes
(ACC/ACCESSORY, on, off), and the RKE
transmitter appears to be undamaged, try
another transmitter. Or, you may try placing
the transmitter in the front cupholder. See
“Starting the Vehicle with a Low Transmitter
Battery”
underRemote Keyless Entry (RKE)
System Operation 07.
If the engine does not start with the other
transmitter or when the transmitter is in the
pocket in the front cupholder, the vehicle
needs service. See your dealer who can
service the theft-deterrent system and have
a new transmitter programmed to the
vehicle.
Do not leave the transmitter 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
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.

Buick Encore Owner Manual (GMNA-Localizing-U.S./Canada-14607636) -
2021 - CRC - 8/18/20
24 Seats and Restraints
Seats and Restraints
Head Restraints
Head Restraints . . . . . . . . . . . . . . . . . . . . . . . . 24
Front Seats
Seat Adjustment . . . . . . . . . . . . . . . . . . . . . . . . 25
Power Seat Adjustment . . . . . . . . . . . . . . . . 26
Lumbar Adjustment . . . . . . . . . . . . . . . . . . . . 26
Reclining Seatbacks . . . . . . . . . . . . . . . . . . . . . 26
Front Seat Armrest . . . . . . . . . . . . . . . . . . . . . 27
Folding Seatback . . . . . . . . . . . . . . . . . . . . . . . 28
Rear Seats
Rear Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Rear Seat Armrest . . . . . . . . . . . . . . . . . . . . . . 32
Seat Belts
Seat Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
How to Wear Seat Belts Properly . . . . . . . 33
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . . . . 34
Seat Belt Use During Pregnancy . . . . . . . . 37
Seat Belt Extender . . . . . . . . . . . . . . . . . . . . . . 37
Safety System Check . . . . . . . . . . . . . . . . . . . 37
Seat Belt Care . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Replacing Seat Belt System Parts after aCrash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Airbag System
Airbag System . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Where Are the Airbags? . . . . . . . . . . . . . . . . 40 When Should an Airbag Inflate? . . . . . . . . 41
What Makes an Airbag Inflate? . . . . . . . . . 42
How Does an Airbag Restrain? . . . . . . . . . 42
What Will You See after an Airbag
Inflates? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Passenger Sensing System . . . . . . . . . . . . . 44
Servicing the Airbag-Equipped Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Adding Equipment to the Airbag-Equipped Vehicle . . . . . . . . . . . . . . 47
Airbag System Check . . . . . . . . . . . . . . . . . . . 48
Replacing Airbag System Parts after a Crash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Child Restraints
Older Children . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Infants and Young Children . . . . . . . . . . . . 50
Child Restraint Systems . . . . . . . . . . . . . . . . . 52
Where to Put the Restraint . . . . . . . . . . . . . 53
Lower Anchors and Tethers for Children(LATCH System) . . . . . . . . . . . . . . . . . . . . . . . 54
Replacing LATCH System Parts After a Crash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Securing Child Restraints (With the Seat Belt in the Rear Seat) . . . . . . . . . . . . . . . . . 62
Securing Child Restraints (With the Seat Belt in the Front Seat) . . . . . . . . . . . . . . . . 64
Head Restraints
{
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.
Front Seats
The front seats have adjustable head
restraints in the outboard seating positions.

Buick Encore Owner Manual (GMNA-Localizing-U.S./Canada-14607636) -
2021 - CRC - 8/18/20
Seats and Restraints 25
Adjust the head restraint so that the top of
the restraint is at the same height as the
top of the occupant's head. This position
reduces the chances of a neck injury in a
crash.
The height of the head restraint can be
adjusted. Pull the head restraint up to raise
it. Try to move the head restraint to make
sure that it is locked in place.
To lower the head restraint, press the
button, located on the top of the seatback,
and push the head restraint down. Try to
move the head restraint after the button is
released to make sure that it is locked in
place.The front seat outboard head restraints are
not removable.
Rear Seats
The rear seats have head restraints in the
outboard seating positions that can be
lowered for better visibility when the rear
seat is unoccupied.
To lower the head restraint, press the
button, located on the top of the seatback,
and push the head restraint down.
When an occupant is in the seat, always
return the head restraint to the upright
position. Pull the head restraint up and push
it rearward until it locks into place. Push and
pull on the head restraint to make sure that
it is locked.
If you are installing a child restraint in the
rear seat, see
“Securing a Child Restraint
Designed for the LATCH System” under
Lower Anchors and Tethers for Children
(LATCH System) 054.
Front Seats
Seat Adjustment
{Warning
You can lose control of the vehicle if you
try to adjust a driver seat while the
vehicle is moving. Adjust the driver seat
only when the vehicle is not moving.

Buick Encore Owner Manual (GMNA-Localizing-U.S./Canada-14607636) -
2021 - CRC - 8/18/20
28 Seats and Restraints
There is an armrest on the inboard side of
the driver seat. To raise or lower the
armrest, push up or pull down on the
armrest.
Folding Seatback
The front passenger seatback folds flat.
{Warning
If you fold the seatback forward to carry
longer objects, such as skis, be sure any
such cargo is not near an airbag. In a
crash, an inflating airbag might force that
object toward a person. This could cause
severe injury or even death. Secure
objects away from the area in which an
airbag would inflate. For more
information, seeWhere Are the Airbags?
0 40 and
Vehicle Load Limits 0170.
{Warning
Things you put on this seatback can
strike and injure people in a sudden stop
or turn, or in a crash. Remove or secure
all items before driving. To fold the seatback:
1. Lower the head restraint all the way. See Head Restraints 024.
2. Move the seat as far back as possible. See Seat Adjustment 025.
3. Lift the lever fully and fold the seatback
forward.
If necessary, move the seat belt out of
the way to access the lever.
4. Continue lowering the seatback until it is completely folded and locks in place.
To raise the seatback: 1. Lift the lever fully to unlock the seatback. Then, raise the seatback and
push it rearward until it re-engages. 2. Push and pull on the seatback to make
sure it is locked in place.
{Warning
If either seatback is not locked, it could
move forward in a sudden stop or crash.
That could cause injury to the person
sitting there. Always push and pull on
the seatbacks to be sure they are locked.
Rear Seats
Rear Seat Reminder
If equipped, the message REAR SEAT
REMINDER LOOK IN REAR SEAT displays
under certain conditions indicating there
may be an item or passenger in the rear
seat. Check before exiting the vehicle.
This feature will activate when a second row
door is opened while the vehicle is on or up
to 10 minutes before the vehicle is turned
on. There will be an alert when the vehicle
is turned off. The alert does not directly
detect objects in the rear seat; instead,
under certain conditions, it detects when a
rear door is opened and closed, indicating
that there may be something in the
rear seat.

Buick Encore Owner Manual (GMNA-Localizing-U.S./Canada-14607636) -
2021 - CRC - 8/18/20
Seats and Restraints 35
The following instructions explain how to
wear a lap-shoulder belt properly.1. Adjust the seat, if the seat is adjustable, so you can sit up straight. To see how,
see “Seats” in the Index.
2. Pick up the latch plate and pull the belt
across you. Do not let it get twisted.
The lap-shoulder belt may lock if you
pull the belt across you very quickly.
If this happens, let the belt go back
slightly to unlock it. Then pull the belt
across you more slowly.
If the shoulder portion of a passenger
belt is pulled out all the way, the child
restraint locking feature may be engaged. See
Child Restraint Systems
0 52. If this occurs, let the belt go back
all the way and start again. If the
locking feature stays engaged after
letting the belt go back to stowed
position on the seat, move the seat
rearward or recline the seat until the
shoulder belt retractor lock releases.
The rear center seat belt can only be
withdrawn from the retractor if the
seatback is in the upright locked
position.
3. Push the latch plate into the buckle until it clicks. Pull up on the latch plate to make sure
it is secure. If the belt is not long
enough, see
Seat Belt Extender 037.
Position the release button on the buckle
so that the seat belt could be quickly
unbuckled if necessary.
4. If equipped with a shoulder belt height adjuster, move it to the height that is
right for you. See “Shoulder Belt Height
Adjuster” later in this section for
instructions on use and important safety
information.5. To make the lap part tight, pull up on the shoulder belt.