2020 CHEVROLET SONIC ECU

Chevrolet Sonic Owner Manual (GMNA-Localizing-U.S./Canada-13566834) -
2020 - CRC - 10/4/19
Keys, Doors, and Windows 7
Keys, Doors, and
Windows
Keys and Locks
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Remote Keyless Entry (RKE)System . . . . . . . . . . . . . . . . . . . . . . . 10
Remote Keyless Entry (RKE) System Operation (Keyless
Access) . . . . . . . . . . . . . . . . . . . . . . 10
Remote Keyless Entry (RKE) System Operation (Key
Access) . . . . . . . . . . . . . . . . . . . . . . 16
Remote Vehicle Start . . . . . . . . . . 20
Door Locks . . . . . . . . . . . . . . . . . . . . 21
Delayed Locking . . . . . . . . . . . . . . . 23
Automatic Door Locks . . . . . . . . . 23
Lockout Protection . . . . . . . . . . . . . 23
Safety Locks . . . . . . . . . . . . . . . . . . . 24
Doors
Trunk (Sedan) . . . . . . . . . . . . . . . . . 24
Liftgate (Hatchback) . . . . . . . . . . . 26
Vehicle Security
Vehicle Security . . . . . . . . . . . . . . . . 27
Vehicle Alarm System . . . . . . . . . 27
Immobilizer . . . . . . . . . . . . . . . . . . . . 28 Immobilizer Operation (Key
Access) . . . . . . . . . . . . . . . . . . . . . . 28
Immobilizer Operation (Keyless Access) . . . . . . . . . . . . . . . . . . . . . . 29
Exterior Mirrors
Convex Mirrors . . . . . . . . . . . . . . . . 30
Manual Mirrors . . . . . . . . . . . . . . . . . 30
Power Mirrors . . . . . . . . . . . . . . . . . . 31
Folding Mirrors . . . . . . . . . . . . . . . . . 31
Heated Mirrors . . . . . . . . . . . . . . . . . 31
Interior Mirrors
Manual Rearview Mirror . . . . . . . . 31
Windows
Windows . . . . . . . . . . . . . . . . . . . . . . . 32
Manual Windows . . . . . . . . . . . . . . 32
Power Windows . . . . . . . . . . . . . . . 32
Sun Visors . . . . . . . . . . . . . . . . . . . . . 34
Roof
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . 34
Keys and Locks
Keys
{Warning
Leaving children in a vehicle with
an ignition key or Remote
Keyless Entry (RKE) transmitter is
dangerous and children or others
could be seriously injured or
killed. They could operate the
power window or other controls or
make the vehicle move. The
windows will function with the key
in the ignition or 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 the ignition key or an RKE
transmitter.

Chevrolet Sonic Owner Manual (GMNA-Localizing-U.S./Canada-13566834) -
2020 - CRC - 10/4/19
18 Keys, Doors, and Windows
until the turn signal lamps flash to
start the engine from outside the
vehicle using the RKE transmitter.
SeeRemote Vehicle Start 020.
The buttons on the RKE transmitter
are disabled when there is a key in
the ignition.
Programming Keys to the
Vehicle
Only RKE transmitters programmed
to this vehicle will work. If a
transmitter is lost or stolen, a
replacement can be purchased and
programmed through your dealer.
When the replacement transmitter is
programmed to this vehicle, all
remaining transmitters must also be
reprogrammed. Any lost or stolen
transmitters will no longer work
once the new transmitter is
programmed.
Programming with Two
Recognized Keys
To program a new key:
1. Insert the original, already programmed key in the ignition
and turn on the ignition. 2. Turn the ignition off, and
remove the key.
3. Quickly, within five seconds, insert the second original
already programmed key in the
ignition and turn on the ignition.
4. Turn the ignition off, and remove the key.
5. Insert the new key to be programmed and turn the
ignition on within five seconds.
The security light will turn off
once the key has been
programmed.
6. Repeat Steps 1–5 if additional keys are to be programmed.
If a key is lost or damaged, see your
dealer to have a new key made.
Programming without Two
Recognized Keys
Program a new key to the vehicle
when two recognized keys are not
available. Canadian regulations
require that owners see their dealer. If two currently recognized keys are
not available, follow this procedure
to program the first key.
This procedure will take
approximately 30 minutes to
complete for the first key. The
vehicle must be off and all of the
keys you wish to program must be
with you.
1. Insert the new vehicle key into the ignition.
2. Turn the ignition on. The security light will come on.
3. Wait 10 minutes until the security light turns off.
4. Turn the ignition off.
5. Repeat Steps 2–4 two more times. After the third time, turn
the ignition on; the key is
learned and all previously
known keys will no longer work
with the vehicle.
6. To program the second key, turn the ignition off and insert
the second key to be learned
and turn the ignition on.

Chevrolet Sonic Owner Manual (GMNA-Localizing-U.S./Canada-13566834) -
2020 - CRC - 10/4/19
Keys, Doors, and Windows 25
Warning (Continued)
and set the fan speed to the
highest setting. See
“Climate Control Systems”
in the Index.
. If the vehicle is equipped
with a power liftgate, disable
the power liftgate function.
For more information about
carbon monoxide, see Engine
Exhaust 0179.
To lock or unlock the trunk from the
inside, press
QorKon the central
locking switch or on the driver door
lock switch.
To open the trunk from inside the
vehicle, press
V.
To open the trunk from outside of
the vehicle: .
Press
Kon the RKE transmitter
to unlock all doors, then use the
touch pad.
. Press
Xtwice on the RKE
transmitter.
See Remote Keyless Entry (RKE)
System Operation (Keyless Access)
0 10 or
Remote Keyless Entry (RKE)
System Operation (Key Access)
0 16.
To lock the trunk from outside press
Qon the RKE transmitter.
Emergency Trunk Release
Handle
Caution
Do not use the emergency trunk
release handle as a tie-down or
anchor point when securing items
in the trunk as it could damage
the handle.

Chevrolet Sonic Owner Manual (GMNA-Localizing-U.S./Canada-13566834) -
2020 - CRC - 10/4/19
Keys, Doors, and Windows 27
To open the liftgate from the
outside, press
Kon the RKE
transmitter to unlock all doors, then
use the touch pad.
See Remote Keyless Entry (RKE)
System Operation (Keyless Access)
0 10 or
Remote Keyless Entry (RKE)
System Operation (Key Access)
0 16.
When closing the liftgate, close from
the center to ensure that it fully
latches.
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 : Vehicle 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 trunk/
liftgate is open. Slow Flash :
Alarm system is
armed.
Arming the Alarm System
1. Close all doors, the trunk/ liftgate, and the hood.
2. Lock the vehicle in one of two ways:
.Use the RKE transmitter.
. 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
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 the driver door is opened without
first unlocking with the RKE
transmitter, the horn will chirp and

Chevrolet Sonic Owner Manual (GMNA-Localizing-U.S./Canada-13566834) -
2020 - CRC - 10/4/19
28 Keys, Doors, and Windows
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.
If a door, the hood, or the liftgate is
opened without first unlocking with
the RKE transmitter, 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 System
To disarm the system, either unlock
the doors using the RKE transmitter,
or start the vehicle with a
recognized transmitter in the
vehicle.
To avoid setting off the alarm by
accident:
. Press
Kon the RKE transmitter.
. Start the vehicle.
To avoid setting off the alarm by
accident: .
Lock the vehicle after all
occupants have left the vehicle
and all doors are closed.
. Always unlock a door 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 on the transmitter
and the horn chirps and the lights
flash three times, an alarm occurred
previously while the alarm system
was armed.
Immobilizer
See Radio Frequency Statement
0 304.
Immobilizer Operation
(Key Access)
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 key is
removed from the ignition.
The system is automatically
disarmed when the vehicle is
started with the correct key. The key
uses a transponder that matches an
immobilizer control unit in the
vehicle and automatically disarms
the system. Only an authorized key
starts the vehicle. The vehicle may
not start if the key is damaged.
The security light in the instrument
cluster comes on if there is a
problem with arming or disarming
the theft-deterrent system.
When trying to start the vehicle, the
security light comes on briefly when
the ignition is turned on.

Chevrolet Sonic Owner Manual (GMNA-Localizing-U.S./Canada-13566834) -
2020 - CRC - 10/4/19
Keys, Doors, and Windows 29
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 engine still does not start, and
the key appears to be undamaged
or the light continues to stay on, try
another ignition key. If the engine
does not start with the other key, the
vehicle needs service. If the vehicle
does start, the first key may be
damaged. See your dealer who can
service the theft-deterrent system
and have a new key made.
Do not leave the transmitter or
device that disarms or deactivates
the theft-deterrent system in the
vehicle.
Immobilizer Operation
(Keyless Access)
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
(Keyless Access) 010 or
Remote Keyless Entry (RKE)
System Operation (Key Access)
0 16.

Chevrolet Sonic Owner Manual (GMNA-Localizing-U.S./Canada-13566834) -
2020 - CRC - 10/4/19
36 Seats and Restraints
Seats and
Restraints
Head Restraints
Head Restraints . . . . . . . . . . . . . . . 37
Front Seats
Seat Adjustment . . . . . . . . . . . . . . . 38
Power Seat Adjustment . . . . . . . . 39
Reclining Seatbacks . . . . . . . . . . . 39
Front Seat Armrest . . . . . . . . . . . . 41
Heated Front Seats . . . . . . . . . . . . 41
Rear Seats
Rear Seats . . . . . . . . . . . . . . . . . . . . 42
Seat Belts
Seat Belts . . . . . . . . . . . . . . . . . . . . . 44
How to Wear Seat BeltsProperly . . . . . . . . . . . . . . . . . . . . . . 45
Lap-Shoulder Belt . . . . . . . . . . . . . 47
Seat Belt Use During Pregnancy . . . . . . . . . . . . . . . . . . . . 50
Seat Belt Extender . . . . . . . . . . . . . 50
Safety System Check . . . . . . . . . . 50
Seat Belt Care . . . . . . . . . . . . . . . . . 51
Replacing Seat Belt System Parts after a Crash . . . . . . . . . . . 51
Airbag System
Airbag System . . . . . . . . . . . . . . . . . 52
Where Are the Airbags? . . . . . . . 54
When Should an AirbagInflate? . . . . . . . . . . . . . . . . . . . . . . . 55
What Makes an Airbag
Inflate? . . . . . . . . . . . . . . . . . . . . . . . 56
How Does an Airbag Restrain? . . . . . . . . . . . . . . . . . . . . . 56
What Will You See after an Airbag Inflates? . . . . . . . . . . . . . . 57
Passenger Sensing System . . . 58
Servicing the Airbag-Equipped Vehicle . . . . . . . . . . . . . . . . . . . . . . . 62
Adding Equipment to the Airbag-Equipped Vehicle . . . . . 63
Airbag System Check . . . . . . . . . . 63
Replacing Airbag System Parts after a Crash . . . . . . . . . . . . . . . . . 64
Child Restraints
Older Children . . . . . . . . . . . . . . . . . 64
Infants and Young Children . . . . 66
Child Restraint Systems . . . . . . . 68
Where to Put the Restraint . . . . . 70
Lower Anchors and Tethers forChildren (LATCH System) . . . . 71
Replacing LATCH System Parts After a Crash . . . . . . . . . . . . . . . . . 79 Securing Child Restraints (With
the Seat Belt in the
Rear Seat) . . . . . . . . . . . . . . . . . . . 80
Securing Child Restraints (With the Seat Belt in the
Front Seat) . . . . . . . . . . . . . . . . . . . 82

Chevrolet Sonic Owner Manual (GMNA-Localizing-U.S./Canada-13566834) -
2020 - CRC - 10/4/19
38 Seats and Restraints
Rear Seats
The vehicle's rear seats have
adjustable head restraints in the
outboard seating positions.
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.
If you are installing a child restraint
in the rear seat, see“Securing a
Child Restraint Designed for the
LATCH System” underLower
Anchors and Tethers for Children
(LATCH System) 071.Front Seats
Seat Adjustment
Manual Seats
{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.
To adjust a manual seat: