2004 CHEVROLET EXPRESS CARGO VAN oil change

Maintenance Schedule
Introduction
Important: Keep engine oil at the proper level and
change as recommended.
Have you purchased the GM Protection Plan? The Plan
supplements your new vehicle warranties. See your
Warranty and Owner Assistance booklet or your dealer
for details.
Maintenance Requirements
Notice:Maintenance intervals, checks, inspections,
replacement parts and recommended uids and
lubricants as prescribed in this manual are
necessary to keep your vehicle in good working
condition. Any damage caused by failure to follow
scheduled maintenance may not be covered by
warranty.
Your Vehicle and the Environment
Proper vehicle maintenance not only helps to keep your
vehicle in good working condition, but also helps the
environment. All recommended maintenance is
important. Improper vehicle maintenance can even
affect the quality of the air we breathe. Improper uid
levels or the wrong tire ination can increase the level of
emissions from your vehicle. To help protect our
environment, and to keep your vehicle in good condition,
be sure to maintain your vehicle properly.
6-2

Owner Checks and Services on page 6-9tells you what
should be checked, when to check it and what you
can easily do to help keep your vehicle in good
condition.
The proper replacement parts, uids and lubricants to
use are listed inRecommended Fluids and Lubricants
on page 6-12andNormal Maintenance Replacement
Parts on page 6-14. When your vehicle is serviced,
make sure these are used. All parts should be replaced
and all necessary repairs done before you or anyone
else drives the vehicle. We recommend the use of
genuine GM parts.
Scheduled Maintenance
When the CHANGE ENGINE OIL message comes on, it
means that service is required for your vehicle. Have
your vehicle serviced as soon as possible within the next
600 miles (1 000 km). It is possible that, if you are
driving under the best conditions, the engine oil
life system may not indicate that vehicle service is
necessary for over a year. However, your engine oil and
lter must be changed at least once a year and at
this time the system must be reset. Your GM
Goodwrench dealer has GM-trained service technicians
who will perform this work using genuine GM parts
and reset the system.If the engine oil life system is ever reset accidentally,
you must service your vehicle within 3,000 miles
(5 000 km) since your last service. Remember to reset
the oil life system whenever the oil is changed. See
Engine Oil on page 5-13for information on the Engine
Oil Life System and resetting the system.
When the CHANGE ENGINE OIL message appears,
certain services, checks and inspections are required.
Required services are described in the following for
“MaintenanceI” and “MaintenanceII.” Generally,
it is recommended that your rst service be
MaintenanceI, your second service be MaintenanceII
and that you alternate MaintenanceIand MaintenanceII
thereafter. However, in some cases, MaintenanceII
may be required more often.
MaintenanceI— Use MaintenanceIif the CHANGE
ENGINE OIL message comes on within ten months
since vehicle was purchased or MaintenanceII
was performed.
MaintenanceII— Use MaintenanceIIif the previous
service performed was MaintenanceI. Always use
MaintenanceIIwhenever the message comes on ten
months or more since the last service or if the message
has not come on at all for one year.
6-4

Scheduled Maintenance
Service MaintenanceIMaintenanceII
Change engine oil and lter. Reset oil life system. SeeEngine Oil on
page 5-13.An Emission Control Service.••
Lubricate chassis components.See footnote #.••
Visually check for any leaks or damage.See footnote (j).••
Inspect engine air cleaner lter or change indicator (if equipped). If necessary,
replace lter. SeeEngine Air Cleaner/Filter on page 5-18.An Emission Control
Service. See footnote †.••
Rotate tires and check ination pressures and wear. SeeTires on page 5-58.••
Inspect brake system.See footnote (a).••
Check engine coolant and windshield washer uid levels and add uid as
needed.••
Perform any needed additional services. See “Additional Required Services” in
this section.••
Inspect suspension and steering components.See footnote (b).•
Inspect engine cooling system.See footnote (c).•
Inspect wiper blades.See footnote (d).•
Inspect restraint system components.See footnote (e).•
Lubricate body components.See footnote (f).•
Check transmission uid level and add uid as needed.•
Inspect shields (vehicles with GVWR above 10,000 lbs. only).See footnote (g).•
Inspect throttle system.See footnote (m).•
6-5

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

O
Off-Road Recovery..........................................4-13
Oil
Change Engine Oil Light...............................3-38
Engine.......................................................5-13
Pressure Gage............................................3-37
Older Children, Restraints................................1-34
Online Owner Center........................................ 7-4
OnStar
®Personal Calling.................................2-36
OnStar®Services............................................2-36
OnStar®System.............................................2-35
OnStar®Virtual Advisor....................................2-36
Operation Tips................................................3-21
Other Warning Devices...................................... 3-7
Outlet Adjustment............................................3-21
Outside
Camper-Type Mirrors....................................2-32
Convex Mirror.............................................2-34
Heated Mirrors............................................2-35
Manual Mirror.............................................2-32
Power Mirrors.............................................2-33
Overseas – Customer Assistance........................ 7-5
Owner Checks and Services.............................. 6-9
Owners, Canadian............................................... ii
Owner’s Information........................................7-12
P
Park (P)
Shifting Into................................................2-27
Shifting Out of............................................2-29
Parking
Brake........................................................2-26
Over Things That Burn.................................2-30
Parking on Hills..............................................4-50
Passenger Van...............................................1-52
Passenger Vans with an Air Bag Off Switch........1-47
Passenger Vans without an Air Bag Off Switch.......1-46
Passing.................................................4-14, 4-48
Passlock
®......................................................2-19
Payload.........................................................4-38
Plan Ahead When Possible................................ 7-8
Playing a Cassette Tape..................................3-56
Playing a CD.................................3-48, 3-59, 3-67
Playing a Specic Loaded CD..........................3-68
Playing the Radio...................3-43, 3-46, 3-50, 3-61
Power
Accessory Outlets........................................3-18
Door Locks.................................................. 2-8
Reduced Engine Light..................................3-40
Seat............................................................ 1-4
Steering Fluid.............................................5-36
Windows....................................................2-17
Power Steering...............................................4-11
9

Weight of the Trailer Tongue.............................4-45
What Kind of Engine Oil to Use........................5-14
What to Do with Used Oil................................5-17
Wheels
Alignment and Tire Balance..........................5-72
Replacement...............................................5-72
When to Add Engine Oil..................................5-14
When to Change Engine Oil (GM Oil
Life System)...............................................5-16
When to Check Power Steering Fluid................5-37
When to Inspect the Engine Air Cleaner/Filter.....5-18
When You Are Ready to Leave After
Parking on a Hill.........................................4-50
Where to Put the Restraint...............................1-46
Why Safety Belts Work....................................1-11
Windows.......................................................2-16Manual......................................................2-16
Power........................................................2-17
Swing-Out Windows.....................................2-18
Windshield Washer.........................................3-10
Fluid..........................................................5-38
Windshield Wiper
Blade Replacement......................................5-56
Fuses......................................................5-101
Windshield Wipers............................................ 3-9
Winter Driving................................................4-27
Y
Your Vehicle and the Environment....................... 6-2
14