2020 BUICK ENVISION ECU

Buick Envision Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13555857) - 2020 - CRC - 3/26/19
Keys, Doors, and Windows 7
Keys, Doors, and
Windows Keys and Locks Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Remote Keyless Entry (RKE)
System . . . . . . . . . . . . . . . . . . . . . . . . 8
Remote Keyless Entry (RKE)
System Operation . . . . . . . . . . . . . 8
Remote Vehicle Start . . . . . . . . . . 14
Door Locks . . . . . . . . . . . . . . . . . . . . 16
Power Door Locks . . . . . . . . . . . . . 18
Delayed Locking . . . . . . . . . . . . . . . 18
Automatic Door Locks . . . . . . . . . 18
Lockout Protection . . . . . . . . . . . . . 18
Safety Locks . . . . . . . . . . . . . . . . . . . 19
Doors Liftgate . . . . . . . . . . . . . . . . . . . . . . . . 20
Vehicle Security Vehicle Security . . . . . . . . . . . . . . . . 25
Vehicle Alarm System . . . . . . . . . 25
Immobilizer . . . . . . . . . . . . . . . . . . . . 26
Immobilizer Operation . . . . . . . . . 26
Exterior Mirrors
Convex Mirrors . . . . . . . . . . . . . . . . 27
Power Mirrors . . . . . . . . . . . . . . . . . . 27 Folding Mirrors . . . . . . . . . . . . . . . . . 28
Heated Mirrors . . . . . . . . . . . . . . . . . 28
Automatic Dimming Mirror . . . . . 28
Reverse Tilt Mirrors . . . . . . . . . . . . 28
Interior Mirrors Interior Rearview Mirrors . . . . . . . 28
Automatic Dimming Rearview
Mirror . . . . . . . . . . . . . . . . . . . . . . . . . 28
Windows Windows . . . . . . . . . . . . . . . . . . . . . . . 29
Power Windows . . . . . . . . . . . . . . . 29
Sun Visors . . . . . . . . . . . . . . . . . . . . . 31
Roof Sunroof . . . . . . . . . . . . . . . . . . . . . . . . 31 Keys and Locks Keys
{ WarningLeaving 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 Envision Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13555857) - 2020 - CRC - 3/26/19
Keys, Doors, and Windows 17The RKE transmitter must be within
1 m (3 ft) of the liftgate or door
being opened. Press the button on
the door handle to unlock. See
“ Keyless Access Operation ” in
Remote Keyless Entry (RKE)
System Operation 0 8 .
Driver Door Key Lock Cylinder
Access (In Case of Dead
Battery)
To access the driver door key lock
cylinder:
1. Insert the key into the slot on
the bottom of the cap. 2. Lift the key upward to remove
the cap.
3. Insert the key into the cylinder
and turn to unlock.
To replace the cap:
1. Position the bottom edge of the
cap under the lower edge of
the metal piece (2). The
tabs (3) attach to the metal
piece (2) at the positions (1). 3. Rotate the cap upward and
install into place.
4. Check that the cap is secure.
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.

Buick Envision Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13555857) - 2020 - CRC - 3/26/19
Keys, Doors, and Windows 21The liftgate can be opened when
locked if the RKE transmitter is
within 1 m (3 ft) of the touch pad.
See Remote Keyless Entry (RKE)
System Operation 0 8 .
The liftgate has an electric latch.
If the battery is disconnected or has
low voltage, the liftgate will not
open. The liftgate will resume
operation when the battery is
reconnected and charged.
Power Liftgate Operation
{ WarningYou or others could be injured if
caught in the path of the power
liftgate. Make sure there is no one
in the way of the liftgate as it is
opening and closing. CautionDriving with an open and
unsecured liftgate may result in
damage to the power liftgate
components.
If equipped with a power liftgate, the
switch is on the driver door. The
vehicle must be in P (Park).
The modes are:
.
MAX: Opens to maximum
height. .
3/4: Opens to a reduced height
that can be set from 3/4 to fully
open. Use to prevent the liftgate
from opening into overhead
obstructions such as a garage
door or roof-mounted cargo. The
liftgate can be manually opened
all the way.
.
OFF: Opens manually only.
To power open or close the liftgate,
select MAX or 3/4 mode.
.
Press
b twice quickly on the
RKE transmitter until the liftgate
moves.
.
Press
8 on the driver door.
.
Press the touch pad on the
outside liftgate handle after
unlocking all doors. The RKE
transmitter must be within
1 m (3 ft).

Buick Envision Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13555857) - 2020 - CRC - 3/26/19
Keys, Doors, and Windows 25
Vehicle Security This vehicle has theft-deterrent
features; however, they do not make
the vehicle impossible to steal.
Vehicle Alarm System This vehicle has an anti-theft alarm
system.
The indicator light, on the
instrument panel near the
windshield, indicates the status of
the system:
Off : Alarm system is disarmed. On Solid : Vehicle is secured
during the delay to arm the system.
Fast Flash : Vehicle is unsecured.
A door, the hood, or the liftgate
is open.
Slow Flash : Alarm system is
armed.
Arming the Alarm System 1. Turn off the vehicle.
2. Lock the vehicle in one of
three ways:
.
Use the RKE transmitter.
.
Use the Keyless Access
system.
.
With a door open, press the
inside
Q .
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
Q on the RKE
transmitter a second time will bypass the 30-second delay
and immediately arm the alarm
system.
If the driver door 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
K on the RKE
transmitter during the 10-second
pre-alarm, the alarm will be
activated.
The aIarm will also be activated if a
door, the hood, or the liftgate is
opened without first disarming the
system. When the alarm is
activated, the turn signals will flash
and the horn will sound 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:
.
Press
K on the RKE transmitter.

Buick Envision Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13555857) - 2020 - CRC - 3/26/19
26 Keys, Doors, and Windows .
Unlock the vehicle using the
Keyless Access system.
.
Start the vehicle.
To avoid setting off the alarm by
accident:
.
Lock the vehicle after all
occupants have exited.
.
Always unlock the vehicle with
the RKE transmitter, or use the
Keyless Access system.
Unlocking the driver door with the
key will not disarm the system or
turn off the alarm.
How to Detect a Tamper
Condition If
K is pressed on the RKE
transmitter and the horn chirps and
the lights flash three times, an alarm
occurred previously while the alarm
system was armed.
If the alarm has been activated, a
message will appear on the Driver
Information Center (DIC). Immobilizer See Radio Frequency Statement
0 335 .
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 the ignition button is
pushed in 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 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 ” under Remote
Keyless Entry (RKE) System
Operation 0 8 .
If the engine does not start with the
other transmitter or when the
transmitter is in the front cupholder,
the vehicle needs service. See your
dealer who can service the

Buick Envision Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13555857) - 2020 - CRC - 3/25/19
Seats and Restraints 33
Seats and
Restraints Head Restraints Head Restraints . . . . . . . . . . . . . . . 34
Front Seats Power Seat Adjustment . . . . . . . . 36
Lumbar Adjustment . . . . . . . . . . . . 36
Thigh Support Adjustment . . . . . 37
Reclining Seatbacks . . . . . . . . . . . 37
Memory Seats . . . . . . . . . . . . . . . . . 38
Heated and Ventilated Front
Seats . . . . . . . . . . . . . . . . . . . . . . . . . 41
Rear Seats Rear Seats . . . . . . . . . . . . . . . . . . . . 42
Rear Seat Armrest . . . . . . . . . . . . . 44
Heated Rear Seats . . . . . . . . . . . . 45
Seat Belts Seat Belts . . . . . . . . . . . . . . . . . . . . . 45
How to Wear Seat Belts
Properly . . . . . . . . . . . . . . . . . . . . . . 46
Lap-Shoulder Belt . . . . . . . . . . . . . 48
Seat Belt Use During
Pregnancy . . . . . . . . . . . . . . . . . . . . 51
Seat Belt Extender . . . . . . . . . . . . . 52
Safety System Check . . . . . . . . . . 52 Seat Belt Care . . . . . . . . . . . . . . . . . 52
Replacing Seat Belt System
Parts after a Crash . . . . . . . . . . . 53
Airbag System Airbag System . . . . . . . . . . . . . . . . . 54
Where Are the Airbags? . . . . . . . 55
When Should an Airbag
Inflate? . . . . . . . . . . . . . . . . . . . . . . . 57
What Makes an Airbag
Inflate? . . . . . . . . . . . . . . . . . . . . . . . 58
How Does an Airbag
Restrain? . . . . . . . . . . . . . . . . . . . . . 58
What Will You See after an
Airbag Inflates? . . . . . . . . . . . . . . 59
Passenger Sensing System . . . 60
Servicing the Airbag-Equipped
Vehicle . . . . . . . . . . . . . . . . . . . . . . . 65
Adding Equipment to the
Airbag-Equipped Vehicle . . . . . 65
Airbag System Check . . . . . . . . . . 66
Replacing Airbag System Parts
after a Crash . . . . . . . . . . . . . . . . . 66
Child Restraints Older Children . . . . . . . . . . . . . . . . . 67
Infants and Young Children . . . . 68
Child Restraint Systems . . . . . . . 71
Where to Put the Restraint . . . . . 72
Lower Anchors and Tethers for
Children (LATCH System) . . . . 73 Replacing LATCH System Parts
After a Crash . . . . . . . . . . . . . . . . . 81
Securing Child Restraints (With
the Seat Belt in the
Rear Seat) . . . . . . . . . . . . . . . . . . . 82
Securing Child Restraints (With
the Seat Belt in the
Front Seat) . . . . . . . . . . . . . . . . . . . 84

Buick Envision Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13555857) - 2020 - CRC - 3/25/19
Seats and Restraints 35
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 it is locked in
place.
Always adjust the head restraint so
that the top of the restraint is at the
same height as the top of the
occupant ’ s head. The rear outboard head restraints
are designed to be folded. The head
restraint can be folded backward to
allow for better visibility when the
rear seat is unoccupied. To fold the
head restraint, press the button on
the side of the head restraint.
When an occupant is in the seat,
always return the head restraint to
the upright position. Pull the head
restraint up and push it backward
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) 0 73 .

Buick Envision Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13555857) - 2020 - CRC - 3/25/19
Seats and Restraints 49
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 71 . 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.
Engaging the child restraint
locking feature in the front
outboard seating position may
affect the passenger sensing
system. See Passenger
Sensing System 0 60 . If the webbing locks in the latch
plate before it reaches the
buckle, tilt the latch plate flat to
unlock.
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 0 52 .
Position the release button on
the buckle so that the seat belt
could be quickly unbuckled if
necessary.