ECU CHEVROLET EXPRESS CARGO 2021 Workshop Manual

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14583525) - 2021 - CRC - 12/9/20
278 OnStar
.Receive a Diagnostic check of the vehicle's
key operating systems.
.Receive Roadside Assistance.
.Manage Wi-Fi Settings, if equipped.
Press
>to get a priority connection to an
OnStar Advisor available 24/7 to:
.Get help for an emergency.
.Be a Good Samaritan or respond to an
AMBER Alert.
.Get assistance in severe weather or other
crisis situations and find evacuation
routes.
OnStar Services
Emergency
Emergency Services require an active safety
and security plan. With Automatic Crash
Response, built-in sensors can automatically
alert a specially trained OnStar Advisor who
is immediately connected in to the vehicle
to help.
Press
>for a priority connection to an
OnStar Advisor who can contact emergency
service providers, direct them to your exact
location, and relay important information. With OnStar Crisis Assist, specially trained
Advisors are available 24 hours a day, 7 days
a week, to provide a central point of
contact, assistance, and information during a
crisis.
With Roadside Assistance, Advisors can
locate a nearby service provider to help with
a flat tire, a battery jump, or an empty
gas tank.
Security
If equipped, OnStar provides these services:
.With Stolen Vehicle Assistance, OnStar
Advisors can use GPS to pinpoint the
vehicle and help authorities quickly
recover it.
.With Remote Ignition Block, if equipped,
OnStar can block the engine from being
restarted.
.With Stolen Vehicle Slowdown,
if equipped, OnStar can work with law
enforcement to gradually slow the
vehicle down.
Theft Alarm Notification
If equipped, if the doors are locked and the
vehicle alarm sounds, a notification by text,
e-mail, or phone call will be sent. If the
vehicle is stolen, an OnStar Advisor can work
with authorities to recover the vehicle.
OnStar Additional
Information
In-Vehicle Audio Messages
Audio messages may play important
information at the following times:
.Prior to vehicle purchase. PressQto set
up an account.
.After change in ownership and at
90 days.
Transferring Service
PressQto request account transfer
eligibility information. The Advisor can
cancel or change account information.
Selling/Transferring the Vehicle
Call 1-888-4ONSTAR (1-888-466-7827)
immediately to terminate your OnStar or
connected services if the vehicle is disposed
of, sold, transferred, or if the lease ends.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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280 OnStar
Languages
The vehicle can be programmed to respond
in multiple languages. Press
Qand ask for
an Advisor. Advisors are available in English,
Spanish, and French. Available languages
may vary by country.
Potential Issues
OnStar cannot perform Remote Door Unlock
or Stolen Vehicle Assistance after the vehicle
has been off continuously for 10 days
without an ignition cycle. If the vehicle has
not been started for 10 days, OnStar can
contact Roadside Assistance or a locksmith
to help gain access to the vehicle.
Global Positioning System (GPS)
.Obstruction of the GPS can occur in a
large city with tall buildings; in parking
garages; around airports; in tunnels and
underpasses; or in an area with very
dense trees. If GPS signals are not
available, the OnStar system should still
operate to call OnStar. However, OnStar
could have difficulty identifying the exact
location.
.In emergency situations, OnStar can use
the last stored GPS location to send to
emergency responders. A temporary loss of GPS can cause loss of
the ability to send a Turn-by-Turn
Navigation route. The Advisor may give a
verbal route or may ask for a call back after
the vehicle is driven into an open area.
Cellular and GPS Antennas
Cellular reception is required for OnStar to
send remote signals to the vehicle. Do not
place items over or near the antenna to
prevent blocking cellular and GPS signal
reception.
Unable to Connect to OnStar Message
If there is limited cellular coverage or the
cellular network has reached maximum
capacity, this message may come on. Press
Qto try the call again or try again after
driving a few miles into another
cellular area.
Vehicle and Power Issues
OnStar services require a vehicle electrical
system, wireless service, and GPS satellite
technologies to be available and operating
for features to function properly. These
systems may not operate if the battery is
discharged or disconnected.
Add-on Electrical Equipment
The OnStar system is integrated into the
electrical architecture of the vehicle. Do not
add any electrical equipment. See Add-On
Electrical Equipment 0176. Added electrical
equipment may interfere with the operation
of the OnStar system and cause it to not
operate.
Vehicle Software Updates
OnStar or GM may remotely deliver
software updates or changes to the vehicle
without further notice or consent. These
updates or changes may enhance or
maintain safety, security, or the operation
of the vehicle or the vehicle systems.
Software updates or changes may affect or
erase data or settings that are stored in the
vehicle, such as saved navigation
destinations or pre-set radio stations.
Neither OnStar nor GM is responsible for
any affected or erased data or settings.
These updates or changes may also collect
personal information. Such collection is
described in the OnStar privacy statement or
separately disclosed at the time of
installation. These updates or changes may
also cause a system to automatically
communicate with GM servers to collect
information about vehicle system status,

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Connected Services 283
PressQ, then ask the Advisor to download
directions to the vehicle’s navigation system,
if equipped. After the call ends, the
navigation screen will provide prompts to
begin driving directions. Routes that are sent
to the navigation screen can only be
canceled through the navigation system.
See www.onstar.com (U.S.) or www.onstar.ca
(Canada).
Connections
The following services help with staying
connected.
For coverage maps, see www.onstar.com
(U.S.) or www.onstar.ca (Canada).
Ensuring Security
.Change the default passwords for the
Wi-Fi hotspot and myChevrolet mobile
application. Make these passwords
different from each other and use a
combination of letters and numbers to
increase the security.
.Change the default name of the SSID
(Service Set Identifier). This is your
network’s name that is visible to other
wireless devices. Choose a unique name
and avoid family names or vehicle
descriptions. Wi-Fi Hotspot (If Equipped)
The vehicle may have a built-in Wi-Fi
hotspot that provides access to the Internet
and web content at 4G LTE speed. Up to
seven mobile devices can be connected.
A data plan is required. Use the in-vehicle
controls only when it is safe to do so.
1. To retrieve Wi-Fi hotspot information, press
=to open the OnStar app on the
infotainment display, then select Wi-Fi
Hotspot. On some vehicles, touch Wi-Fi
or Wi-Fi Settings on the screen.
2. The Wi-Fi settings will display the Wi-Fi hotspot name (SSID), password, and on
some vehicles, the connection type
(no Internet connection, 3G, 4G, 4G LTE),
and signal quality (poor, good, excellent).
The LTE icon shows connection to Wi-Fi.
It is possible that the icon may not
illuminate even though the vehicle has
an active connection.
3. To change the SSID or password, press
Qor call 1-888-4ONSTAR to connect
with an Advisor. On some vehicles, the
SSID and password can be changed in
the Wi-Fi Hotspot menu. After initial set-up, your vehicle’s Wi-Fi
hotspot will connect automatically to your
mobile devices. Manage data usage by
turning Wi-Fi on or off on your mobile
device, using the myChevrolet mobile app,
or by contacting an OnStar Advisor. On
some vehicles, Wi-Fi can also be managed
from the Wi-Fi Hotspot menu.
MyChevrolet Mobile App (If Available)
Download the myChevrolet mobile app to
compatible Apple and Android smartphones.
Chevrolet users can access the following
services from a smartphone:
.Remotely start/stop the vehicle,
if factory-equipped.
.Lock/unlock doors, if equipped with
automatic locks.
.Activate the horn and lamps.
.Check the vehicle’s fuel level, oil life,
or tire pressure, if factory-equipped with
the Tire Pressure Monitor System.
.Send destinations to the vehicle.
.Locate the vehicle on a map
(U.S. market only).
.Turn the vehicle's Wi-Fi hotspot on/off,
manage settings, and monitor data
consumption, if equipped.
.Locate a dealer and schedule service.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Index 285
IndexA
Accessories and Modifications . . . . . . . . . . . .178
Accessory Power . . . . . . . . . . . . . . . . . . . . . . . . . .138
Add-On Electrical Equipment . . . . . . . . . . . . . 176
Additional InformationOnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
Additional Maintenance and Care . . . . . . . . 255
Agreements Trademarks and License . . . . . . . . . . . . . . . . 117
Air Cleaner/Filter, Engine . . . . . . . . . . . . . . . . 189
Air Conditioning . . . . . . . . . . . . . . . . . . . . . 119, 122
Air Vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .124
Airbag System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
How Does an Airbag Restrain? . . . . . . . . . . 41
What Makes an Airbag Inflate? . . . . . . . . . 40
What Will You See after an Airbag
Inflates? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
When Should an Airbag Inflate? . . . . . . . . 40
Where Are the Airbags? . . . . . . . . . . . . . . . . 38
Airbags Adding Equipment to the Vehicle . . . . . . . 45
Light On-Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
On-Off Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
On-Off Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Readiness Light . . . . . . . . . . . . . . . . . . . . . . . . . 74
Servicing Airbag-Equipped Vehicles . . . . . . 44
System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Alarm
Vehicle Security . . . . . . . . . . . . . . . . . . . . . . . . 16
Alert Side Blind Zone (SBZA) . . . . . . . . . . . . . . . . . 155
All-Season Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . 212
AM-FM Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101
Antenna Fixed Mast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Multi-band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Antilock Brake System (ABS) . . . . . . . . . . . . . 146 Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Appearance Care Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242
Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246
Ashtrays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Assistance Program, Roadside . . . . . . . . . . . . 268
Audio Theft-Deterrent Feature . . . . . . . . . . . . . . . . . 97
Audio Players CD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Automatic
Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Headlamp System . . . . . . . . . . . . . . . . . . . . . . 91
Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Transmission Fluid . . . . . . . . . . . . . . . . 186, 189
Automatic Transmission Manual Mode . . . . . . . . . . . . . . . . . . . . . . . . . 144
Shift Lock Control Function Check . . . . . . 201

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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286 Index
AuxiliaryDevices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Avoiding Untrusted Media Devices . . . . . . . 104
Axle, Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
B
Battery Exterior Lighting Battery Saver . . . . . . . . . 95
Load Management . . . . . . . . . . . . . . . . . . . . . . 95
Power Protection . . . . . . . . . . . . . . . . . . . . . . . 95
Battery - North America . . . . . . . . . . . . .199, 237
Blade Replacement, Wiper . . . . . . . . . . . . . . . 201
Bluetooth Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Brake System Warning Light . . . . . . . . . . . . . . . . . . 77
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Antilock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Parking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Braking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Break-In, New Vehicle . . . . . . . . . . . . . . . . . . . . . 135
Bulb Replacement Center High-Mounted Stoplamp(CHMSL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Front Turn Signal, Sidemarker, and Parking Lamps . . . . . . . . . . . . . . . . . . . . . . . 202 Bulb Replacement (cont'd)
Halogen Bulbs . . . . . . . . . . . . . . . . . . . . . . . . . 202
Headlamp Aiming . . . . . . . . . . . . . . . . . . . . . . 202
Headlamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
License Plate Lamps . . . . . . . . . . . . . . . . . . . 204
Taillamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
Buying New Tires . . . . . . . . . . . . . . . . . . . . . . . . 223
C
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
California Perchlorate Materials Requirements . . . 178
California Proposition 65 Warning . . . . . . . . . . . . . . . . . . .178, 199, 237, Back Cover
Camera Rear Vision (RVC) . . . . . . . . . . . . . . . . . . . . . . 152
Canadian Vehicle Owners . . . . . . . . . . . . . . . . . . .2
Capacities and Specifications . . . . . . . . . . . . . 261
Carbon Monoxide Engine Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . 141
Winter Driving . . . . . . . . . . . . . . . . . . . . . . . . . 130
Cargo Tie-Downs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Cargo Door Relocking . . . . . . . . . . . . . . . . . . . . . . 11
Caution, Danger, and Warning . . . . . . . . . . . . . .2
CD Player . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 Center High-Mounted Stoplamp
(CHMSL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Chains, Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
Charging System Light . . . . . . . . . . . . . . . . . . . . 76
Check Engine Light (Malfunction Indicator) . . . . 76
Ignition Transmission Lock . . . . . . . . . . . . . 201
Child Restraints Infants and Young Children . . . . . . . . . . . . . 47
Lower Anchors and Tethers forChildren . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Older Children . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Securing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58, 60
Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Cigarette Lighter . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Circuit Breakers . . . . . . . . . . . . . . . . . . . . . . . . . . 205
Cleaning Exterior Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 242
Interior Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 246
Climate Control Systems . . . . . . . . . . . . . . . . . . 119 Air Conditioning . . . . . . . . . . . . . . . . . . . . . . . . 119
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Rear Heating System . . . . . . . . . . . . . . . . . . . 121
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Cluster, Instrument . . . . . . . . . . . . . . . . . . . . . . . . 71
Collision Damage Repair . . . . . . . . . . . . . . . . . . 271

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Index 287
CompartmentsStorage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Compass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Connected Services Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 283
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284
Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 282
Connections Connected Services . . . . . . . . . . . . . . . . . . . . 283
Control Traction and Electronic Stability . . . . . . . 147
Control of a Vehicle . . . . . . . . . . . . . . . . . . . . . . 127
Convex Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Coolant Engine Temperature Gauge . . . . . . . . . . . . . 73
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119, 122
Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
Courtesy Transportation Program . . . . . . . . 270
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Customer Assistance . . . . . . . . . . . . . . . . . . . . . 267
Offices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267
Text Telephone (TTY) Users . . . . . . . . . . . . 267
Customer Information Publications Ordering Information . . . . . 273
Customer Satisfaction Procedure . . . . . . . . . 265
Cybersecurity . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275D
Damage Repair, Collision . . . . . . . . . . . . . . . . . . 271
Danger, Warning, and Caution . . . . . . . . . . . . . .2
Data Collection Infotainment System . . . . . . . . . . . . . . . . . . 276
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276
Data Recorders, Event . . . . . . . . . . . . . . . . . . . 275
Daytime Running Lamps (DRL) . . . . . . . . . . . . .91
Defensive Driving . . . . . . . . . . . . . . . . . . . . . . . . 126
Delayed Locking . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Devices Auxiliary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Diagnostics Connected Services . . . . . . . . . . . . . . . . . . . . 284
Distracted Driving . . . . . . . . . . . . . . . . . . . . . . . . 126
Dome Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Door Cargo Door Relocking . . . . . . . . . . . . . . . . . . . . 11
Delayed Locking . . . . . . . . . . . . . . . . . . . . . . . . . 12
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Power Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Rear Doors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Sliding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Drive Belt Routing, Engine . . . . . . . . . . . . . . . 264
Driver Assistance Systems . . . . . . . . . . . . . . . 150
Driver Information Center (DIC) . . . . . . . . . . . .81 Driving
Better Fuel Economy . . . . . . . . . . . . . . . . . . . 126
Characteristics and Towing Tips . . . . . . . . 160
Defensive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Hill and Mountain Roads . . . . . . . . . . . . . . 130
If the Vehicle is Stuck . . . . . . . . . . . . . . . . . . 131
Impaired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Loss of Control . . . . . . . . . . . . . . . . . . . . . . . . 128
Off-Road Recovery . . . . . . . . . . . . . . . . . . . . . 128
Vehicle Load Limits . . . . . . . . . . . . . . . . . . . . 132
Wet Roads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
E
Electrical Equipment, Add-On . . . . . . . . . . . . 176
Electrical SystemEngine Compartment Fuse Block . . . . . . . 206
Floor Console Fuse Block . . . . . . . . . . . . . . . 210
Fuses and Circuit Breakers . . . . . . . . . . . . . 205
Overload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
Emergency
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
Engine Air Cleaner/Filter . . . . . . . . . . . . . . . . . . . . . . 189
Check Light (Malfunction Indicator) . . . . . 76
Compartment Overview . . . . . . . . . . . . . . . . . 181
Coolant Heater . . . . . . . . . . . . . . . . . . . . . . . . 139

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290 Index
Lights (cont'd)Airbag Readiness . . . . . . . . . . . . . . . . . . . . . . . 74
Antilock Brake System (ABS)
Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Brake System Warning . . . . . . . . . . . . . . . . . 77
Charging System . . . . . . . . . . . . . . . . . . . . . . . 76
Check Engine (Malfunction Indicator) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Engine Oil Pressure . . . . . . . . . . . . . . . . . . . . . 80
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
High-Beam On . . . . . . . . . . . . . . . . . . . . . . . . . . 81
High/Low Beam Changer . . . . . . . . . . . . . . . 91
Lane Departure Warning . . . . . . . . . . . . . . . . 79
Low Fuel Warning . . . . . . . . . . . . . . . . . . . . . . 80
Seat Belt Reminders . . . . . . . . . . . . . . . . . . . . 74
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
StabiliTrak OFF . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Tow/Haul Mode . . . . . . . . . . . . . . . . . . . . . . . . 78
Traction Control System (TCS)/StabiliTrak . . . . . . . . . . . . . . . . . . . . . . 79
Locking Rear Axle . . . . . . . . . . . . . . . . . . . . . . . . 148
Locks Automatic Door . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Cargo Door Relocking . . . . . . . . . . . . . . . . . . . . 11
Delayed Locking . . . . . . . . . . . . . . . . . . . . . . . . . 12
Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Locks (cont'd)
Lockout Protection . . . . . . . . . . . . . . . . . . . . . . . 12
Power Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Loss of Control . . . . . . . . . . . . . . . . . . . . . . . . . . .128
Low Fuel Warning Light . . . . . . . . . . . . . . . . . . 80
Lower Anchors and Tethers for Children (LATCH System) . . . . . . . . . . . . . . . . .52
M
MaintenanceRecords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259
Maintenance and Care Additional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255
Maintenance Schedule . . . . . . . . . . . . . . . . . . . . 251 Recommended Fluids andLubricants . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257
Malfunction Indicator Lamp . . . . . . . . . . . . . . . 76
Manual Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Manual Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Manual Windows . . . . . . . . . . . . . . . . . . . . . . . . . .19
Media Avoiding Untrusted Devices . . . . . . . . . . . . 104
Messages Engine Power . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Vehicle Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 Mirrors
Convex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Folding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Heated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Manual Rearview . . . . . . . . . . . . . . . . . . . . . . . 19
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Trailer Tow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Mirrors, Interior Rearview . . . . . . . . . . . . . . . . . .19
Monitor System, Tire Pressure . . . . . . . . . . . .218
Multi-band Antenna . . . . . . . . . . . . . . . . . . . . . 104
N
Navigation Connected Services . . . . . . . . . . . . . . . . . . . . 282
New Vehicle Break-In . . . . . . . . . . . . . . . . . . . . . 135
Noise Control System . . . . . . . . . . . . . . . . . . . . 199
O
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Off-Road
Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Oil Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Engine Oil Life System . . . . . . . . . . . . . . . . . 186
Engine Oil Pressure Gauge . . . . . . . . . . . . . . 72
Pressure Light . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Older Children, Restraints . . . . . . . . . . . . . . . . . 46

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Index 291
Online Owner Center . . . . . . . . . . . . . . . . . . . . 267
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276
OnStar Additional Information . . . . . . . . . . . 278
OnStar Emergency . . . . . . . . . . . . . . . . . . . . . . . 278
OnStar Overview . . . . . . . . . . . . . . . . . . . . . . . . . 277
OnStar Security . . . . . . . . . . . . . . . . . . . . . . . . . . 278
OnStar System . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
OperationInfotainment System . . . . . . . . . . . . . . . . . . 100
Outlets Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Overheating, Engine . . . . . . . . . . . . . . . . . . . . . 194
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97, 99 Instrument Panel . . . . . . . . . . . . . . . . . . . . . . . . 4
P
ParkShifting Into . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Shifting Out of . . . . . . . . . . . . . . . . . . . . . . . . . 141
Park Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Parking Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Brake and P (Park) MechanismCheck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
Over Things That Burn . . . . . . . . . . . . . . . . . . 141
Perchlorate Materials Requirements,
California . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .178 Personalization
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Phone Bluetooth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Power Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Outlets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Protection, Battery . . . . . . . . . . . . . . . . . . . . . . 95
Retained Accessory (RAP) . . . . . . . . . . . . . . 138
Seat Adjustment . . . . . . . . . . . . . . . . . . . . . . . . 23
Steering Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Pregnancy, Using Seat Belts . . . . . . . . . . . . . . .35
Privacy Vehicle Data Recording . . . . . . . . . . . . . . . . 274
Program Courtesy Transportation . . . . . . . . . . . . . . . 270
Prohibited Fuels . . . . . . . . . . . . . . . . . . . . . . . . . .158
Proposition 65 Warning, California . . . . . . . . . . . . . . . . . . . . .178, 199, 237,
Back Cover
Publication Ordering Information . . . . . . . . 273
R
Radio Frequency Statement . . . . . . . . . . . . . . 273
Radio Reception . . . . . . . . . . . . . . . . . . . . . . . . . 103
Radios AM-FM Radio . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Satellite . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Reading Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Rear Axle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199 Locking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Rear Climate Control System . . . . . . . . . . . . . 122
Rear Doors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Rear Heating System . . . . . . . . . . . . . . . . . . . . . 121
Rear Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Rear Vision Camera (RVC) . . . . . . . . . . . . . . . . . 152
Rear Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Rearview Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . .19
Reclining Seatbacks . . . . . . . . . . . . . . . . . . . . . . . .23
Recommended Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Recommended Fluids and Lubricants . . . . . 257
Records Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 259
Recreational Vehicle Towing . . . . . . . . . . . . . 240
Reimbursement Program, GM Mobility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268

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292 Index
Remote Keyless Entry (RKE) System . . . . . . . 8
Remote Vehicle Start . . . . . . . . . . . . . . . . . . . . . 10
Replacement PartsAirbags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 258
Replacing Airbag System . . . . . . . . . . . . . . . . . . 45
Replacing LATCH System Parts after a Crash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Replacing Seat Belt System Parts after a Crash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Reporting Safety Defects
Canadian Government . . . . . . . . . . . . . . . . . 274
General Motors . . . . . . . . . . . . . . . . . . . . . . . . 274
U.S. Government . . . . . . . . . . . . . . . . . . . . . . . 273
Restraints Where to Put . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Retained Accessory Power (RAP) . . . . . . . . . .138
Roads Driving, Wet . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Roadside Assistance Program . . . . . . . . . . . . 268
Rotation, Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
Routing, Engine Drive Belt . . . . . . . . . . . . . . . 264
Running the Vehicle While Parked . . . . . . . .142S
Safety Defects Reporting Canadian Government . . . . . . . . . . . . . . . . . 274
General Motors . . . . . . . . . . . . . . . . . . . . . . . . 274
U.S. Government . . . . . . . . . . . . . . . . . . . . . . . 273
Safety Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Safety System Check . . . . . . . . . . . . . . . . . . . . . .35
Satellite Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Scheduling Appointments . . . . . . . . . . . . . . . . 270
Seat Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Extender . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
How to Wear Seat Belts Properly . . . . . . . 29
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . . . . . 31
Reminders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Replacing after a Crash . . . . . . . . . . . . . . . . . 36
Use During Pregnancy . . . . . . . . . . . . . . . . . . 35
Seats Adjustment, Front . . . . . . . . . . . . . . . . . . . . . . 22
Head Restraints . . . . . . . . . . . . . . . . . . . . . . . . . 22
Power Adjustment, Front . . . . . . . . . . . . . . . 23
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Reclining Seatbacks . . . . . . . . . . . . . . . . . . . . . 23
Securing Child Restraints . . . . . . . . . . . . . . 58, 60 Security
Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Vehicle Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .124 Accessories and Modifications . . . . . . . . . 178
Climate Control System . . . . . . . . . . . . . . . . . 119
Doing Your Own Work . . . . . . . . . . . . . . . . . 179
Maintenance Records . . . . . . . . . . . . . . . . . . 259
Maintenance, General Information . . . . . 250
Parts Identification . . . . . . . . . . . . . . . . . . . . . 260
Scheduling Appointments . . . . . . . . . . . . . . 270
Services Special Application . . . . . . . . . . . . . . . . . . . . . 255
Servicing the Airbag . . . . . . . . . . . . . . . . . . . . . . 44
Shift Lock Control Function Check,
Automatic Transmission . . . . . . . . . . . . . . . . 201
Shifting Into Park . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Out of Park . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Side Blind Zone Alert (SBZA) . . . . . . . . . . . . . . 155
Side Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Sidemarker Bulb Replacement . . . . . . . . . . . . . . . . . . . . . . 202

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14583525) - 2021 - CRC - 12/9/20
294 Index
TransmissionAutomatic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Fluid, Automatic . . . . . . . . . . . . . . . . . . 186, 189
Transportation Program, Courtesy . . . . . . . 270
Trip Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Turn and Lane-Change Signals . . . . . . . . . . . . 93
U
Uniform Tire Quality Grading . . . . . . . . . . . . 225
Using This Manual . . . . . . . . . . . . . . . . . . . . . . . . . .2
V
Vehicle Alarm System . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Canadian Owners . . . . . . . . . . . . . . . . . . . . . . . . 2
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Identification Number (VIN) . . . . . . . . . . . . 260
Load Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Personalization . . . . . . . . . . . . . . . . . . . . . . . . . 86
Remote Start . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Speed Messages . . . . . . . . . . . . . . . . . . . . . . . . 86
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Vehicle Ahead Indicator . . . . . . . . . . . . . . . . . . . 79
Vehicle Care Tire Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217 Vehicle Data Recording and Privacy . . . . . . 274
Ventilation, Air . . . . . . . . . . . . . . . . . . . . . . . . . . .124
Visors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Voltmeter Gauge . . . . . . . . . . . . . . . . . . . . . . . . . .73
W
Warning
Brake System Light . . . . . . . . . . . . . . . . . . . . . 77
Caution and Danger . . . . . . . . . . . . . . . . . . . . . 2
Lane Departure (LDW) . . . . . . . . . . . . . . . . . . 157
Warning Lights, Gauges, and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Warnings Hazard Flashers . . . . . . . . . . . . . . . . . . . . . . . . . 92
Washer Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Wheels Alignment and Tire Balance . . . . . . . . . . . . 226
Different Size . . . . . . . . . . . . . . . . . . . . . . . . . . 225
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . 226
When It Is Time for New Tires . . . . . . . . . . . 223
Where to Put the Restraint . . . . . . . . . . . . . . . . 51
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 Enhanced Technology Glass . . . . . . . . . . . . . . 21
Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Swing-out Windows . . . . . . . . . . . . . . . . . . . . 20 Windshield
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
Wiper/Washer . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Winter Driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Winter Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213
Wiper Blade Replacement . . . . . . . . . . . . . . . . 201