2004 CHEVROLET EXPRESS CARGO VAN engine

Vehicle Data Collection and Event
Data Recorders
Your vehicle, like other modern motor vehicles, has a
number of sophisticated computer systems that monitor
and control several aspects of the vehicle’s
performance. Your vehicle uses on-board vehicle
computers to monitor emission control components to
optimize fuel economy, to monitor conditions for air bag
deployment and, if so equipped, to provide anti-lock
braking and to help the driver control the vehicle
in difficult driving situations. Some information may be
stored during regular operations to facilitate repair
of detected malfunctions; other information is stored only
in a crash or near crash event by computer systems
commonly called event data recorders (EDR).
In a crash or near crash event, computer systems, such
as the Air Bag Sensing and Diagnostic Module (SDM)
in your vehicle may record information about the
condition of the vehicle and how it was operated, such
as engine speed, brake applications, throttle position,
vehicle speed, safety belt usage, air bag readiness, air
bag performance data, and the severity of a collision.
This information has been used to improve vehicle crash
performance and may be used to improve crash
performance of future vehicles and driving safety. Unlike
the data recorders on many airplanes, these on-board
systems do not record sounds, such as conversation of
vehicle occupants.To read this information, special equipment is needed
and access to the vehicle or the SDM is required. GM will
not access information about a crash event or share it
with others other thanwith the consent of the vehicle owner or, if the vehicle
is leased, with the consent of the lessee,
in response to an official request of police or similar
government office,
as part of GM’s defense of litigation through the
discovery process, or
as required by law.
In addition, once GM collects or receives data, GM may
use the data for GM research needs,
make it available for research where appropriate
condentiality is to be maintained and need is
shown, or
share summary data which is not tied to a specic
vehicle with non-GM organizations for research
purposes.
Others, such as law enforcement, may have access to
the special equipment that can read the information
if they have access to the vehicle or SDM.
If your vehicle is equipped with OnStar
®, please check
the OnStar®subscription service agreement or manual
for information on its operations and data collection.
7-10

Service Publications Ordering
Information
Service Manuals
Service Manuals have the diagnosis and repair
information on engines, transmission, axle, suspension,
brakes, electrical, steering, body, etc.
RETAIL SELL PRICE: $120.00
Transmission, Transaxle, Transfer
Case Unit Repair Manual
This manual provides information on unit repair service
procedures, adjustments, and specications for GM
transmissions, transaxles, and transfer cases.
RETAIL SELL PRICE: $50.00
Service Bulletins
Service Bulletins give technical service information
needed to knowledgeably service General Motors cars
and trucks. Each bulletin contains instructions to
assist in the diagnosis and service of your vehicle.
In Canada, information pertaining to Product Service
Bulletins can be obtained by contacting your General
Motors dealer or by calling 1-800-GM-DRIVE
(1-800-463-7483).
Owner’s Information
Owner publications are written specically for owners
and intended to provide basic operational information
about the vehicle. The owner’s manual will include
the Maintenance Schedule for all models.
In-Portfolio: Includes a Portfolio, Owner’s Manual, and
Warranty Booklet.
RETAIL SELL PRICE: $35.00
Without Portfolio: Owner’s Manual only.
RETAIL SELL PRICE: $25.00
7-12

A
Accessory Power Outlets.................................3-18
Adding Equipment to Your Air Bag-Equipped
Vehicle.......................................................1-81
Adding Washer Fluid.......................................5-38
Additional Program Information........................... 7-9
Additives, Fuel................................................. 5-6
Add-On Electrical Equipment...........................5-101
Add-On Equipment..........................................4-38
Adjusting the Speakers
(Balance/Fade)....................3-45, 3-47, 3-53, 3-63
Air Bag
Off Light.....................................................3-28
Readiness Light..........................................3-27
Air Bag System..............................................1-70
Adding Equipment to Your Air Bag-Equipped
Vehicle...................................................1-81
Air Bag Off Switch.......................................1-77
How Does an Air Bag Restrain?....................1-75
Servicing Your Air Bag-Equipped Vehicle.........1-80
What Makes an Air Bag Inate?....................1-75
What Will You See After an Air Bag Inates?......1-76
When Should an Air Bag Inate?...................1-74
Where Are the Air Bags?..............................1-72
Air Bag Systems.............................................1-75
Air Cleaner/Filter, Engine.................................5-18
Airbag Sensing and Diagnostic Module (SDM)....7-10
All-Wheel Drive...............................................5-48
All-Wheel Drive (AWD) System.........................2-26AM ...............................................................3-73
AM-FM Radio.................................................3-43
Antenna, Fixed Mast.......................................3-75
Anti-lock Brake System..................................... 4-7
Anti-Lock Brake, System Warning Light..............3-32
Appearance Care............................................5-92
Care of Safety Belts....................................5-95
Chemical Paint Spotting...............................5-98
Cleaning the Inside of Your Vehicle................5-92
Cleaning the Outside of Your Vehicle..............5-95
Finish Damage............................................5-98
Sheet Metal Damage...................................5-98
Underbody Maintenance...............................5-98
Vehicle Care/Appearance Materials................5-99
Weatherstrips..............................................5-95
Ashtrays........................................................3-18
Audio System(s).............................................3-42
AM-FM Radio.............................................3-43
Care of Your Cassette Tape Player................3-73
Care of Your CD Player...............................3-75
Care of Your CDs........................................3-74
Chime Level Adjustment...............................3-75
Fixed Mast Antenna.....................................3-75
Radio with Cassette and CD.........................3-50
Radio with CD............................................3-46
Radio with Six-Disc CD................................3-61
Setting the Time for Radios with Radio Data
Systems (RDS)........................................3-43
Setting the Time for Radios without Radio
Data Systems (RDS)................................3-43
1

Cargo Vans with a Passenger Air Bag and
without an Air Bag Off Switch........................1-40
Cassette Tape Messages.................................3-58
CD Adapter Kits.............................................3-58
CD Messages................................3-50, 3-61, 3-72
Center High-Mounted Stoplamp.........................3-16
Center Passenger Position, Safety Belts.....1-24, 1-25
Chains, Tire...................................................5-74
Charging System Light....................................3-30
Check
Engine Light...............................................3-34
Gages Warning Light...................................3-41
Check Engine Light.........................................3-34
Checking Brake Fluid......................................5-40
Checking Coolant............................................5-24
Checking Engine Oil........................................5-13
Checking Things Under the Hood......................5-10
Chemical Paint Spotting...................................5-98
Child Restraints
Child Restraint Systems...............................1-43
Infants and Young Children...........................1-36
Lower Anchorages and Top Tethers for
Children (LATCH System)..........................1-53
Older Children.............................................1-34
Securing a Child Restraint Designed
for the LATCH System......................1-55, 1-56
Securing a Child Restraint in a Center
Seat Position...................................1-61, 1-62
Securing a Child Restraint in a Rear
Outside Seat Position...............................1-58Child Restraints (cont.)
Securing a Child Restraint in the Right
Front Seat Position...................................1-65
Top Strap...................................................1-50
Top Strap Anchor Location............................1-51
Where to Put the Restraint...........................1-46
Chime Level Adjustment..................................3-75
Cigarette Lighter.............................................3-18
Cleaning
Inside of Your Vehicle..................................5-92
Outside of Your Vehicle................................5-95
Underbody Maintenance...............................5-98
Weatherstrips..............................................5-95
Cleaning Aluminum Wheels..............................5-97
Cleaning Exterior Lamps/Lenses.......................5-96
Cleaning Fabric/Carpet....................................5-92
Cleaning Glass Surfaces..................................5-94
Cleaning Interior Plastic Components.................5-94
Cleaning Leather............................................5-94
Cleaning the Top of the Instrument Panel...........5-94
Cleaning the Windshield and Wiper Blades.........5-97
Cleaning Tires................................................5-97
Cleaning Vinyl................................................5-94
Climate Control System...................................3-19
Outlet Adjustment........................................3-21
Rear Air Conditioning and Heating System......3-22
Rear Heating System...................................3-22
Control of a Vehicle.......................................... 4-5
3

Coolant
Engine Temperature Gage............................3-34
Heater, Engine............................................2-23
Cooling System..............................................5-28
Cruise Control................................................3-11
Cruise Control Light........................................3-39
Current and Past Model Order Forms................7-13
Customer Assistance Information
Courtesy Transportation.................................. 7-8
Customer Assistance for Text Telephone (TTY)
Users....................................................... 7-4
Customer Assistance Offices........................... 7-4
Customer Satisfaction Procedure..................... 7-2
GM Mobility Program for Persons with
Disabilities................................................ 7-6
Reporting Safety Defects to General Motors....7-11
Reporting Safety Defects to the Canadian
Government............................................7-11
Reporting Safety Defects to the United States
Government............................................7-11
Roadside Assistance Program......................... 7-6
Service Publications Ordering Information........7-12
D
Daytime Running Lamps..................................3-15
Daytime Running Lamps Indicator Light.............3-40
Defensive Driving............................................. 4-2
Defogging and Defrosting.................................3-20Doing Your Own Service Work........................... 5-4
Dome Lamp Override......................................3-17
Dome Lamps.................................................3-17
Door
60/40 Swing-Out Side Door...........................2-13
Cargo Door Relocking.................................... 2-8
Locks.......................................................... 2-7
Power Door Locks......................................... 2-8
Rear Door Security Locks............................... 2-8
Rear Doors.................................................2-14
Sliding Side Door........................................2-11
Driver
Position, Safety Belt.....................................1-15
Driving
At Night.....................................................4-16
City...........................................................4-21
Defensive..................................................... 4-2
Drunken....................................................... 4-2
Freeway.....................................................4-22
Hill and Mountain Roads..............................4-25
In Rain and on Wet Roads...........................4-18
Winter........................................................4-27
Driving On Grades..........................................4-49
Driving on Snow or Ice....................................4-28
Driving Through Deep Standing Water...............4-20
Driving Through Flowing Water.........................4-20
Driving with a Trailer.......................................4-47
Dual Stage Air Bags........................................1-74
Dual Tire Operation.........................................5-67
4

E
Electrical System
Add-On Equipment.....................................5-101
Fuses and Circuit Breakers.........................5-102
Headlamp Wiring.......................................5-101
Windshield Wiper Fuses.............................5-101
Electronic Road-Speed Governor.......................3-26
Emissions Inspection and Maintenance
Programs...................................................3-37
Engine
Air Cleaner/Filter.........................................5-18
Battery.......................................................5-42
Change Engine Oil Light...............................3-38
Check and Service Engine Soon Light............3-34
Coolant......................................................5-22
Coolant Heater............................................2-23
Coolant Temperature Gage...........................3-34
Drive Belt Routing.......................................6-15
Engine Compartment Overview......................5-12
Exhaust.....................................................2-30
Fan Noise..................................................5-36
Oil .............................................................5-13
Overheating................................................5-26
Reduced Power Light...................................3-40
Starting......................................................2-21
Engine Compartment Fuse Block.....................5-103
Engine Oil Additives........................................5-16
Entry Lighting.................................................3-17
Event Data Recorders (EDR)............................7-10Exit Lighting...................................................3-17
Extender, Safety Belt.......................................1-33
Exterior Lamps...............................................3-14
F
Filter
Engine Air Cleaner......................................5-18
Finding a Program Type (PTY) Station.......3-54, 3-64
Finding a Station....................3-44, 3-46, 3-51, 3-62
Finish Care....................................................5-96
Finish Damage...............................................5-98
Fixed Mast Antenna........................................3-75
Flash-To-Pass Feature....................................... 3-9
Flat Tire........................................................5-75
Flat Tire, Changing.........................................5-76
Floor Console Fuse Block..............................5-102
Fluid
Automatic Transmission................................5-19
Power Steering...........................................5-36
Windshield Washer......................................5-38
FM ...............................................................3-73
Following Distance..........................................4-48
Front Axle......................................................5-50
Fuel............................................................... 5-5
Additives...................................................... 5-6
California Fuel.............................................. 5-6
Filling a Portable Fuel Container..................... 5-9
Filling Your Tank........................................... 5-8
5

Fuel (cont.)
Fuels in Foreign Countries.............................. 5-7
Gage.........................................................3-41
Gasoline Octane........................................... 5-5
Gasoline Specications.................................. 5-5
Fuel Regulator................................................2-22
Fuses
Fuses and Circuit Breakers.........................5-102
Windshield Wiper.......................................5-101
G
Gage
Check Gages Warning Light..........................3-41
Engine Coolant Temperature.........................3-34
Fuel..........................................................3-41
Oil Pressure...............................................3-37
Speedometer..............................................3-26
Voltmeter Gage...........................................3-30
Gasoline
Octane........................................................ 5-5
Specications............................................... 5-5
GM Mobility Program for Persons with
Disabilities.................................................... 7-6
H
Hazard Warning Flashers................................... 3-6
Headlamp High/Low Beam Changer.................... 3-9
Headlamp Wiring...........................................5-101
Headlamps....................................................5-52
Bulb Replacement.......................................5-52
Front Turn Signal, Sidemarker and
Parking Lamps.........................................5-54
Halogen Bulbs............................................5-52
Highway Hypnosis...........................................4-24
Hill and Mountain Roads..................................4-25
Hitches..........................................................4-46
Hood
Checking Things Under................................5-10
Release.....................................................5-10
Horn............................................................... 3-7
How to Add Coolant to the Coolant
Recovery Tank............................................5-30
How to Add Coolant to the Radiator..................5-33
How to Check Power Steering Fluid..................5-37
How to Inspect the Engine Air Cleaner/Filter.......5-18
How to Use This Manual...................................... ii
How to Wear Safety Belts Properly...................1-15
Hydroplaning..................................................4-20
6

I
If No Steam Is Coming From Your Engine..........5-27
If Steam Is Coming From Your Engine...............5-26
If the Light Is Flashing.....................................3-35
If the Light Is On Steady.................................3-36
If You Are Caught in a Blizzard.........................4-29
If You Are Stuck in Sand, Mud, Ice or Snow.......4-31
If You Do Decide To Pull A Trailer.....................4-39
Ignition Positions.............................................2-20
Infants and Young Children, Restraints...............1-36
Ination - Tire Pressure...................................5-66
Inside Day/Night Rearview Mirror......................2-32
Instrument Panel
Cluster.......................................................3-25
Overview..................................................... 3-4
Instrument Panel Brightness Control..................3-16
Interior Lamps................................................3-16
J
Jump Starting.................................................5-43
K
Keyless Entry System....................................... 2-3
Keys............................................................... 2-2
L
Lamps
Exterior......................................................3-14
Interior.......................................................3-16
Lamps On Reminder.......................................3-15
Lap Belt........................................................1-25
Lap-Shoulder Belt...........................................1-15
LATCH System
Child Restraints...........................................1-53
Securing a Child Restraint Designed
for the LATCH System......................1-55, 1-56
Leaving Your Vehicle.......................................2-10
Leaving Your Vehicle With the Engine Running......2-28
Light
Air Bag Off .................................................3-28
Air Bag Readiness.......................................3-27
Anti-Lock Brake System Warning...................3-32
Brake System Warning.................................3-31
Change Engine Oil......................................3-38
Charging System.........................................3-30
Check Gages Warning.................................3-41
Cruise Control.............................................3-39
Daytime Running Lamps Indicator..................3-40
Malfunction Indicator....................................3-34
Reduced Engine Power................................3-40
Safety Belt Reminder...................................3-27
Security.....................................................3-39
Stabilitrak
®Indicator.....................................3-33
Stabilitrak®Not Ready..................................3-33
7