2023 CHEVROLET EXPRESS transmission

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16547501) - 2023 - CRC - 6/10/22
246 Service and Maintenance
Recommended Fluids, Lubricants, and Parts
Recommended Fluids and Lubricants
Fluids and lubricants identified below by name or specification, including fluids or lubricants not listed here, can be obtained from your dealer.Usage Fluid/Lubricant
Automatic Transmission (6-Speed Transmission) DEXRON-VI Automatic Transmission Fluid.
Automatic Transmission (8-Speed Transmission) DEXRON-HP Automatic Transmission Fluid.
Chassis Lubrication, Parking Brake Cable Guides Chassis lubricant meeting requirements of NLGI #2, Category LB or GC-LB.
Engine Coolant 50/50 mixture of clean, drinkable water and use only DEX-COOL Coolant. See Cooling System
0 183.
Engine Oil Engine oil meeting the dexos1 specification of the proper SAE viscosity grade. ACDelco dexos1 full synthetic is recommended. See Engine Oil0179.
Hydraulic Brake System DOT 4 Hydraulic Brake Fluid.
Key Lock Cylinders, Hood Hinges Multi-Purpose Lubricant, Superlube. See your dealer. Power Steering System GM Power Steering Fluid. See your dealer. Rear Axle See your dealer.
Windshield Washer Automotive windshield washer fluid that meets regional freeze protection requirements.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16547501) - 2023 - CRC - 6/10/22
252 Technical Data
Engine Specifications
EngineVIN CodeTransmission Spark Plug Gap
4.3L V6 (LV1) PAutomatic 0.95–1.10 mm (0.037–0.043 in)
6.6L V8 (L8T) 7Automatic 0.95–1.10 mm (0.037–0.043 in)
Spark plug gaps are preset by the manufacturer. Re-gapping the spark plug is not recommended and can damage the spark plug.
Engine Drive Belt Routing
4.3L V6 Engine (LV1)
6.6L V8 Engine (L8T)

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16547501) - 2023 - CRC - 6/10/22
260 Customer Information
Choose a reputable repair facility that uses
quality replacement parts. See“Collision
Parts” earlier in this section.
If the airbag has inflated, see What Will You
See after an Airbag Inflates? 040.
Managing the Vehicle Damage Repair
Process
In the event that the vehicle requires
damage repairs, GM recommends that you
take an active role in its repair. If you have
a pre-determined repair facility of choice,
take the vehicle there, or have it towed
there. Specify to the facility that any
required replacement collision parts be
original equipment parts, either new
Genuine GM parts or recycled original GM
parts. Remember, recycled parts will not be
covered by the GM vehicle warranty.
Insurance pays the bill for the repair, but
you must live with the repair. Depending on
your policy limits, your insurance company
may initially value the repair using
aftermarket parts. Discuss this with the
repair professional, and insist on Genuine
GM parts. Remember, if the vehicle is
leased, you may be obligated to have the vehicle repaired with Genuine GM parts,
even if your insurance coverage does not
pay the full cost.
If another party's insurance company is
paying for the repairs, you are not obligated
to accept a repair valuation based on that
insurance company's collision policy repair
limits, as you have no contractual limits
with that company. In such cases, you can
have control of the repair and parts choices
as long as the cost stays within reasonable
limits.
Publication Ordering Information
Service Manuals
Service manuals have the diagnosis and
repair information on the engine/propulsion,
transmission, axle, suspension, brakes,
electrical system, steering system, body, etc.
Customer Literature
Owner’s manuals are written specifically for
owners and are intended to provide basic
operational information about the vehicle.
The owner’s manual includes the
Maintenance Schedule for all models.
Customer literature publications available for
purchase include owner’s manuals, warranty
manuals, and portfolios. Portfolios include an
owner’s manual, warranty manual,
if applicable, and zip lock bag or pouch.
Current and Past Models
Service manuals and customer literature are
available for many current and past model
year GM vehicles.
To order, call 1-800-551-4123 Monday–Friday,
8:00 a.m.–6:00 p.m. Eastern Time
For credit card orders only (VISA,
MasterCard, or Discover), see Helm, Inc. at:
www.helminc.com.
To order by mail, write to:
Helm, Incorporated
Attention: Customer Service
47911 Halyard Drive
Plymouth, MI 48170
Make checks payable in U.S. funds.
Radio Frequency Statement
This vehicle uses license-exempt transmitters
/ receivers / systems that operate on a
radio frequency that complies with Part 15/
Part 18 of the Federal Communications
Commission (FCC) rules and with Innovation,

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16547501) - 2023 - CRC - 6/10/22
262 Customer Information
Customer Care Centre
General Motors of Canada Company
500 Wentworth Street W
Oshawa, ON L1J 0C5
In Mexico, call 800-466-0811 or
800-508-0000.
In other Central America and Caribbean
Countries, call 52-555-901-2369.
Vehicle Data Recording and
Privacy
The vehicle has a number of computers that
record information about the vehicle’s
performance and how it is driven or used.
For example, the vehicle uses computer
modules to monitor and control engine and
transmission performance, to monitor the
conditions for airbag deployment and
deploy them in a crash, and, if equipped, to
provide antilock braking to help the driver
control the vehicle. These modules may
store data to help the dealer technician
service the vehicle or to help GM improve
safety or features. Some modules may also
store data about how the vehicle is
operated, such as rate of fuel consumptionor average speed. These modules may retain
personal preferences, such as radio presets,
seat positions, and temperature settings.
Cybersecurity
GM collects information about the use of
your vehicle including operational and safety
related information. We collect this
information to provide, evaluate, improve,
and troubleshoot our products and services
and to develop new products and services.
The protection of vehicle electronics systems
and customer data from unauthorized
outside electronic access or control is
important to GM. GM maintains appropriate
security standards, practices, guidelines and
controls aimed at defending the vehicle and
the vehicle service ecosystem against
unauthorized electronic access, detecting
possible malicious activity in related
networks, and responding to suspected
cybersecurity incidents in a timely,
coordinated and effective manner. Security
incidents could impact your safety or
compromise your private data. To minimize
security risks, please do not connect your
vehicle electronic systems to unauthorized
devices or connect your vehicle to any
unknown or untrusted networks (such as
Bluetooth, WIFI or similar technology). Inthe event you suspect any security incident
impacting your data or the safe operation of
your vehicle, please stop operating your
vehicle and contact your dealer.Event Data Recorders
This vehicle is equipped with an Event Data
Recorder (EDR). The main purpose of an EDR
is to record, in certain crash or near
crash-like situations, such as an air bag
deployment or hitting a road obstacle, data
that will assist in understanding how a
vehicle’s systems performed. The EDR is
designed to record data related to vehicle
dynamics and safety systems for a short
period of time, typically 30 seconds or less.
The EDR in this vehicle is designed to record
such data as:
.How various systems in your vehicle were
operating;
.Whether or not the driver and passenger
safety belts were buckled/fastened;
.How far (if at all) the driver was
depressing the accelerator and/or brake
pedal; and,
.How fast the vehicle was traveling.
These data can help provide a better
understanding of the circumstances in which
crashes and injuries occur.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16547501) - 2023 - CRC - 6/10/22
268 OnStar
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. SeeAdd-On
Electrical Equipment 0171. 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,
identify whether updates or changes are
available, or deliver updates or changes. An
active OnStar agreement constitutes consent
to these software updates or changes and
agreement that either OnStar or GM may
remotely deliver them to the vehicle.
Privacy
The complete OnStar Privacy Statement may
be found at www.onstar.com (U.S.),
or www.onstar.ca (Canada). We recommend
that you review it. If you have any
questions, call 1-888-4ONSTAR
(1-888-466-7827) or press
Qto speak with
an Advisor. Users of wireless
communications are cautioned that the
privacy of any information sent via wireless
cellular communications cannot be assured.
Third parties may unlawfully intercept or
access transmissions and private
communications without consent.
OnStar - Software Acknowledgements
To obtain the source code under GPL, LGPL,
MPL, and other open source licenses, that is
contained in this product, please visit
https://opensource.lge.com. In addition to
the source code, all referred license terms,
warranty disclaimers, and copyright notices
are available for download. This offer is valid
for a period of three years after our last
shipment of this product. This offer is valid
to anyone in receipt of this information.
*Provided through LG Electronics Inc., who is
solely responsible for provisions of related
OSS compliance.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16547501) - 2023 - CRC - 6/10/22
272 Index
IndexA
Accessories and Modifications . . . . . . . . . . . . 173
Accessory Power . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Add-On Electrical Equipment . . . . . . . . . . . . . . 171
AdditionalOnStar Information . . . . . . . . . . . . . . . . . . . . 266
Agreements Trademarks and License . . . . . . . . . . . . . . . . 112
Air Cleaner/Filter, Engine . . . . . . . . . . . . . . . . . . 182
Conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Air Conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Airbag System . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35 Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
How Does an Airbag Restrain? . . . . . . . . . . 39
What Makes an Airbag Inflate? . . . . . . . . . 39
What Will You See after an AirbagInflates? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
When Should an Airbag Inflate? . . . . . . . . 39
Where Are the Airbags? . . . . . . . . . . . . . . . . 37
Airbags Adding Equipment to the Vehicle . . . . . . . 44
Light On-Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
On-Off Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
On-Off Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Readiness Light . . . . . . . . . . . . . . . . . . . . . . . . . 75 Airbags (cont'd)
Replacing System Parts after a
Crash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Servicing Airbag-Equipped Vehicles . . . . . . 44
Alarm Vehicle Security . . . . . . . . . . . . . . . . . . . . . . . . . 15
Alert
Side Blind Zone (SBZA) . . . . . . . . . . . . . . . . . 150
All-Season Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 204
AM-FM Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Antenna Fixed Mast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Multi-band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Antilock Brake System (ABS) . . . . . . . . . . . . . 140 Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Appearance Care
Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237
Ashtrays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Assistance Program, Roadside . . . . . . . . . . . . 256
Audio Theft-Deterrent Feature . . . . . . . . . . . . . . . . . 98
Automatic Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Headlamp System . . . . . . . . . . . . . . . . . . . . . . 92
Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . 181

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Index 273
Automatic (cont'd)Transmission Shift Lock Control
Function Check . . . . . . . . . . . . . . . . . . . . . . . 193
Automatic Transmission Manual Mode . . . . . . . . . . . . . . . . . . . . . . . . . 139
Auxiliary Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Avoiding Untrusted Media Devices . . . . . . . 103
Axle Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
B
BatteryExterior Lighting Battery Saver . . . . . . . . . 96
Load Management . . . . . . . . . . . . . . . . . . . . . . 95
Power Protection . . . . . . . . . . . . . . . . . . . . . . . 96
Battery - North America . . . . . . . . . . . . . 191, 228
Blade Replacement, Wiper . . . . . . . . . . . . . . . 193
Bluetooth
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Brake Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
System Warning Light . . . . . . . . . . . . . . . . . . 78
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189 Antilock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Brake Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Parking Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Braking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122 Break-In, New Vehicle . . . . . . . . . . . . . . . . . . . . 129
Bulb Replacement . . . . . . . . . . . . . . . . . . . . . . . . 194
Center High-Mounted Stoplamp(CHMSL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Front Turn Signal, Sidemarker, and Parking Lamps . . . . . . . . . . . . . . . . . . . . . . . 194
Halogen Bulbs . . . . . . . . . . . . . . . . . . . . . . . . . 194
Headlamp Aiming . . . . . . . . . . . . . . . . . . . . . . 194
License Plate Lamps . . . . . . . . . . . . . . . . . . . 196
Taillamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Buying New Tires . . . . . . . . . . . . . . . . . . . . . . . . . 215C
Calibration
Compass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
California Perchlorate Materials Requirements . . . . 173
California Proposition 65 Warning . . . . . 1, 228
Camera Rear Vision (RVC) . . . . . . . . . . . . . . . . . . . . . . 146
Canadian Vehicle Owners . . . . . . . . . . . . . . . . . . .2
Capacities and Specifications . . . . . . . . . . . . . 250
Carbon Monoxide
Engine Exhaust . . . . . . . . . . . . . . . . . . . . . . . . 136
Winter Driving . . . . . . . . . . . . . . . . . . . . . . . . . 125
Cargo
Door Relocking . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Tie-Downs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 Caution, Danger, and Warning . . . . . . . . . . . . . .2
Center . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Chains, Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .218
Charging
System Light . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Check Ignition Transmission Lock . . . . . . . . . . . . . 193
Check Engine Light (Malfunction Indicator) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
Child Restraints Infants and Young Children . . . . . . . . . . . . . 46
Lower Anchors and Tethers for
Children . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Older Children . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Securing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58, 60
Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Child Safety Locks . . . . . . . . . . . . . . . . . . . . . . . . . 12
Cigarette Lighter . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Circuit Breakers . . . . . . . . . . . . . . . . . . . . . . . . . . 198
Cleaning Exterior Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
Interior Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 237
Climate Control Systems . . . . . . . . . . . . . . . . . . 114 Air Conditioning . . . . . . . . . . . . . . . . . . . . . . . . 114
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Rear Heating System . . . . . . . . . . . . . . . . . . . 116
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Index 275
EngineAir Cleaner/Filter . . . . . . . . . . . . . . . . . . . . . . 182
Check Light (Malfunction Indicator) . . . . . 77
Compartment Overview . . . . . . . . . . . . . . . . 176
Coolant Heater . . . . . . . . . . . . . . . . . . . . . . . . 133
Coolant Temperature Gauge . . . . . . . . . . . . 74
Cooling System . . . . . . . . . . . . . . . . . . . . . . . . 183
Drive Belt Routing . . . . . . . . . . . . . . . . . . . . . 252
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
Oil Life System . . . . . . . . . . . . . . . . . . . . . . . . . 181
Oil Pressure Gauge . . . . . . . . . . . . . . . . . . . . . 73
Oil Pressure Light . . . . . . . . . . . . . . . . . . . . . . . 81
Overheating . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
Power Messages . . . . . . . . . . . . . . . . . . . . . . . . 86
Running While Parked . . . . . . . . . . . . . . . . . 136
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Enhanced Technology Glass . . . . . . . . . . . . . . . 20
Entry Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Equipment, Towing . . . . . . . . . . . . . . . . . . . . . . 167
Event Data Recorders . . . . . . . . . . . . . . . . . . . . 262
Exit Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Extended Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . .18
Extender, Seat Belt . . . . . . . . . . . . . . . . . . . . . . . 34
Exterior Lamp Controls . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Lamps Off Reminder . . . . . . . . . . . . . . . . . . . . 91
Lighting Battery Saver . . . . . . . . . . . . . . . . . . 96F
FanEngine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
Fast Idle System . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Filter Engine Air Cleaner . . . . . . . . . . . . . . . . . . . . . 182
Fixed Mast Antenna . . . . . . . . . . . . . . . . . . . . . 103
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Flashers, Hazard Warning . . . . . . . . . . . . . . . . . 93
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219 Changing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Fluid Automatic Transmission . . . . . . . . . . . . . . . . 181
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
Power Steering . . . . . . . . . . . . . . . . . . . . . . . . 188
Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
Folding Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Forward Collision Alert (FCA) System . . . . . . . . . . . 148
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260
Front Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Front Seats Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Fuel Additives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153 Fuel (cont'd)
Economy, Driving for Better . . . . . . . . . . . . 121
Filling a Portable Fuel Container . . . . . . . 154
Filling the Tank . . . . . . . . . . . . . . . . . . . . . . . . 153
Foreign Countries . . . . . . . . . . . . . . . . . . . . . . 153
Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Low Fuel Warning Light . . . . . . . . . . . . . . . . 81
Prohibited Fuels . . . . . . . . . . . . . . . . . . . . . . . 153
Recommended . . . . . . . . . . . . . . . . . . . . . . . . . 152
Top Tier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Full-Size Spare Tire . . . . . . . . . . . . . . . . . . . . . . . 227
Fuses Engine Compartment Fuse Block . . . . . . . 198
Floor Console Fuse Block . . . . . . . . . . . . . . . 202
Fuses and Circuit Breakers . . . . . . . . . . . . . 198
G
GaugesEngine Coolant Temperature . . . . . . . . . . . . 74
Engine Oil Pressure . . . . . . . . . . . . . . . . . . . . . 73
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Speedometer . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Trip Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Voltmeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Warning Lights and Indicators . . . . . . . . . . . 71
General Information Service and Maintenance . . . . . . . . . . . . . . 241