2021 CHEVROLET EXPRESS CARGO ECU

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14583525) - 2021 - CRC - 12/9/20
6 Keys, Doors, and Windows
Keys, Doors, and
Windows
Keys and Locks
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Remote Keyless Entry (RKE) System . . . . . 8
Remote Keyless Entry (RKE) SystemOperation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Remote Vehicle Start . . . . . . . . . . . . . . . . . . . 10
Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Power Door Locks . . . . . . . . . . . . . . . . . . . . . . . 11
Cargo Door Relocking . . . . . . . . . . . . . . . . . . . 11
Delayed Locking . . . . . . . . . . . . . . . . . . . . . . . . 12
Automatic Door Locks . . . . . . . . . . . . . . . . . . . 12
Lockout Protection . . . . . . . . . . . . . . . . . . . . . . 12
Safety Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Safety Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Doors
Side Door (60/40 Swing-Out) . . . . . . . . . . . 13
Sliding Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Rear Doors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Vehicle Security
Vehicle Security . . . . . . . . . . . . . . . . . . . . . . . . . 15
Vehicle Alarm System . . . . . . . . . . . . . . . . . . 16
Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Immobilizer Operation . . . . . . . . . . . . . . . . . . 17
Exterior Mirrors
Convex Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . 17
Manual Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . 18
Trailer-Tow Mirrors . . . . . . . . . . . . . . . . . . . . . 18
Power Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Folding Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . 19
Heated Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . 19
Interior Mirrors
Interior Rearview Mirrors . . . . . . . . . . . . . . . 19
Manual Rearview Mirror . . . . . . . . . . . . . . . . 19
Windows
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Manual Windows . . . . . . . . . . . . . . . . . . . . . . . 19
Power Windows . . . . . . . . . . . . . . . . . . . . . . . . 20
Swing-Out Windows . . . . . . . . . . . . . . . . . . . . 20
Enhanced Technology Glass . . . . . . . . . . . . . 21
Rear Windows . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Sun Visors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Keys and Locks
Keys
{Warning
Leaving children in a vehicle with the
ignition key 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 keys in the ignition, 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.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14583525) - 2021 - CRC - 12/9/20
8 Keys, Doors, and Windows
With an active OnStar or connected service
plan, an OnStar Advisor may remotely
unlock the vehicle. SeeOnStar Overview
0 277.
Remote Keyless Entry (RKE)
System
See Radio Frequency Statement 0273.
If there is a decrease in the Remote Keyless
Entry (RKE) operating range:
.Check the distance. The transmitter may
be too far from the vehicle.
.Check the location. Other vehicles or
objects may be blocking the signal.
.Check the transmitter's battery. See
“Battery Replacement” later in this
section.
.If the transmitter is still not working
correctly, see your dealer or a qualified
technician for service.
Remote Keyless Entry (RKE)
System Operation
If equipped, the RKE transmitter functions
work up to 60 m (197 ft) away from the
vehicle. Other conditions can affect the performance
of the transmitter. See
Remote Keyless Entry
(RKE) System 08.
With Remote Start, Without Similar
Q:Press once to lock all doors. If enabled
through the Driver Information Center (DIC),
the parking lamps flash once to indicate
locking has occurred.
The horn may chirp when
Qis pressed
again within five seconds. See Vehicle
Personalization 086.
K:Press to unlock the driver door. IfKis
pressed again within five seconds, all
remaining doors unlock. The interior lamps come on and stay on for
20 seconds or until the ignition is turned on.
If enabled through the DIC, the parking
lamps flash twice to indicate unlocking has
occurred. See
Vehicle Personalization 086.
j:Press to unlock only the cargo doors.
/:If equipped, pressQand then press
and hold
/for at least four seconds or
until the turn signal lamps flash to start the
engine from outside the vehicle using the
RKE transmitter. See Remote Vehicle Start
0 10. To turn on or off, see Vehicle
Personalization 086.
L:Press and release to initiate vehicle
locator. The turn signal lamps flash and the
horn sounds three times.
Press and hold
Lfor more than
two seconds to sound the panic alarm. The
turn signal lamps flash and the horn sounds
repeatedly for 30 seconds. The alarm turns
off when the ignition is turned on or
Lis
pressed again. The ignition must be off for
the panic alarm to work.
If equipped with an RKE transmitter and
OnStar, refer to “Theft Alarm Notification" in
OnStar Security 0278.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14583525) - 2021 - CRC - 12/9/20
12 Keys, Doors, and Windows
Delayed Locking
When locking the doors with the power lock
switch and a door open, the doors will lock
five seconds after the last door is closed. The
horn chirps to signal that the delayed
locking feature is in use.
Pressing
eorQon the RKE transmitter
will override the delayed locking feature and
immediately lock all the doors.
This feature will not operate if the key is in
the ignition.
This feature can be programmed using the
Driver Information Center (DIC). See “DELAY
DOOR LOCK” inVehicle Personalization 086.
Automatic Door Locks
The vehicle may have an automatic lock/
unlock feature. This feature can be
programmed using the Driver Information
Center (DIC). See Vehicle Personalization
0 86.
Lockout Protection
This feature protects you from locking the
key in the vehicle when the key is in the
ignition and a door is open. If the power lock switch is pressed when
either the driver, passenger, or rear door is
open, all the doors will lock and then the
driver door will unlock. This feature does not
include the side cargo door.
If the vehicle has an ambulance package,
this feature is disabled.
Safety Locks
Security locks are located on the front
portion of the 60/40 side swing-out door or
the side sliding door.
60/40 Swing-Out Side Door - Passenger Side.
For the 60/40 side swing-out door, move the
button to the left for the passenger side
door to engage the security feature. Move the button to the right for the
passenger side door to return the door locks
to normal operation.
Side Sliding Door
For the side sliding door, move the button
up to engage the security feature. Move the
button down to return the door locks to
normal operation.
Safety Locks
Security locks are located on the front
portion of the 60/40 side swing-out door or
the side sliding door.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14583525) - 2021 - CRC - 12/9/20
Keys, Doors, and Windows 13
60/40 Swing-Out Side Door—Passenger Side
For the 60/40 side swing-out door, move the
button to the left for the passenger side
door to engage the security feature.
Move the button to the right for the
passenger side door to return the door locks
to normal operation.Side Sliding Door
For the side sliding door, move the button
up to engage the security feature. Move the
button down to return the door locks to
normal operation.
Doors
Side Door (60/40 Swing-Out)
To open the front portion of a 60/40 door
from the outside, pull out on the handle and
open the door.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14583525) - 2021 - CRC - 12/9/20
Keys, Doors, and Windows 15
To open the sliding side door from the
inside, pull the handle toward the rear of
the vehicle. Then, slide the door toward the
rear of the vehicle.
To close the sliding side door from the
inside, grasp the handle and slide the door
toward the front of the vehicle.
Make sure the door is completely closed
before driving away.
Rear Doors
{Warning
Unlocked doors can be dangerous.
.Passengers, especially children, can
easily open the doors and fall out of a
moving vehicle. The doors 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 the vehicle. Locking the doors
can help prevent this from happening.To open the rear doors from the outside,
pull the handle toward you to open the
passenger side rear door first.
To open the driver side rear door, pull the
latch release at the inside edge of the door.
To close the rear doors, close the driver side
rear door first. Then close the passenger side
rear door. Check to make sure both doors
are completely closed.
Vehicle Security
This vehicle has theft-deterrent features;
however, they do not make the vehicle
impossible to steal.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14583525) - 2021 - CRC - 12/9/20
16 Keys, Doors, and Windows
Vehicle Alarm System
This vehicle has an anti-theft alarm system.
Arming the Alarm System
1. Close the side door/rear doors and thehood. Turn off the vehicle.
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. 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 or the manual
door lock.
The alarm will also be activated if a
passenger door, side door, rear door, or 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.
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 and the horn chirps and the
lights flash three times, the alarm was
activated while the alarm system was
armed.
If the alarm system has been activated, and
allowed to complete an event
(approximately one minute), a message will
appear on the Driver Information Center
(DIC) the next time the vehicle is started.
Theft Alarm Notification
To enable e-mail or text notification, see
“Theft Alarm Notification” in OnStarSecurity
0 278.
Testing the Alarm
To test the alarm:
1. Lower the driver window and open the driver door.
2. Press
Qon the RKE transmitter.
3. Close the door and wait for a few seconds.
4. Reach in through the open window, unlock the door with the manual door
lock, and open the door.
This should set off the alarm.
If the alarm does not sound when it
should but the lamps flash, check to see
if the horn works. The horn fuse may be
blown. To replace the fuse, see Fuses and
Circuit Breakers 0205.
Immobilizer
See Radio Frequency Statement 0273.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14583525) - 2021 - CRC - 12/9/20
Keys, Doors, and Windows 17
Immobilizer Operation
This vehicle is equipped with the
PASS-Key®III+ (Personalized Automotive
Security System) theft-deterrent system.
PASS-Key III+ is a passive theft deterrent
system.
The system is automatically armed when
the key is removed from the ignition.
You do not have to manually arm or disarm
the system.
The security light will come on if there is a
problem with arming or disarming the
theft-deterrent system.
If the engine does not start and the security
light comes on, the key may have a
damaged transponder. Turn the ignition off
and try again.
If the engine still does not start, and the
key appears to be undamaged, try another
ignition key. If the engine still does not
start with the other key, the vehicle needs
service. If the vehicle does start, the first
key may be faulty. See your dealer or a
locksmith who can service the PASS-Key III+
to have a new key made. It is possible for the PASS-Key III+ decoder to
learn the transponder value of a new or
replacement key. Up to eight keys may be
programmed for the vehicle. This procedure
is for learning additional keys only. If all the
currently programmed keys are lost or do
not operate, you must see your dealer or a
locksmith who can service PASS-Key III+ to
have keys made and programmed to the
system.
See your dealer or a locksmith who can
service PASS-Key III+ to get a new key blank
that is cut exactly as the ignition key that
operates the system.
To program the new key:
1. Verify the new key has
1stamped
on it.
2. Insert the original, already programmed key into the ignition lock cylinder and
start the engine. If the engine will not
start, see your dealer for service.
3. After the engine has started, turn the ignition off and remove the key.
4. Insert the key to be programmed and turn the ignition on within 10 seconds of
removing the previous key. The security message will turn off once
the key has been programmed. It may
not be apparent that the security
message went on due to how quickly
the key is programmed.
5. Repeat Steps 1–4 if additional keys are to be programmed.
If you lose or damage a PASS-Key III+ key,
see your dealer or a locksmith who can
service PASS-Key III+ to have a new
key made.
Do not leave the key 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 next lane, you could hit a vehicle
that is driving next to you. Check the
inside mirror or glance over your
shoulder before changing lanes.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14583525) - 2021 - CRC - 12/9/20
22 Seats and Restraints
Seats and Restraints
Head Restraints
Head Restraints . . . . . . . . . . . . . . . . . . . . . . . . . 22
Front Seats
Seat Adjustment . . . . . . . . . . . . . . . . . . . . . . . . 22
Power Seat Adjustment . . . . . . . . . . . . . . . . . 23
Reclining Seatbacks . . . . . . . . . . . . . . . . . . . . . 23
Rear Seats
Rear Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Seat Belts
Seat Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
How to Wear Seat Belts Properly . . . . . . 29
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . . . . 31
Seat Belt Use During Pregnancy . . . . . . . . 35
Seat Belt Extender . . . . . . . . . . . . . . . . . . . . . . 35
Safety System Check . . . . . . . . . . . . . . . . . . . 35
Seat Belt Care . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Replacing Seat Belt System Parts after aCrash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Airbag System
Airbag System . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Where Are the Airbags? . . . . . . . . . . . . . . . . 38
When Should an Airbag Inflate? . . . . . . . . 40
What Makes an Airbag Inflate? . . . . . . . . 40
How Does an Airbag Restrain? . . . . . . . . . . 41 What Will You See after an Airbag
Inflates? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Airbag On-Off Switch . . . . . . . . . . . . . . . . . . . 42
Servicing the Airbag-Equipped Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Adding Equipment to the Airbag-Equipped Vehicle . . . . . . . . . . . . . . 45
Airbag System Check . . . . . . . . . . . . . . . . . . . 45
Replacing Airbag System Parts after a Crash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Child Restraints
Older Children . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Infants and Young Children . . . . . . . . . . . . . 47
Child Restraint Systems . . . . . . . . . . . . . . . . 49
Where to Put the Restraint . . . . . . . . . . . . . 51
Lower Anchors and Tethers for Children(LATCH System) . . . . . . . . . . . . . . . . . . . . . . . 52
Replacing LATCH System Parts After a Crash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Securing Child Restraints (With the Seat Belt in the Rear Seat) . . . . . . . . . . . . . . . . . 58
Securing Child Restraints (With the Seat Belt in the Front Seat) . . . . . . . . . . . . . . . 60
Head Restraints
On vehicles with factory installed seats, the
front seats have built-in head restraints that
are not adjustable in the outboard seating
positions.
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.