2004 CHEVROLET EXPRESS CARGO VAN service indicator

Seats and Restraint Systems........................... 1-1
Front Seats
............................................... 1-3
Rear Seats
............................................... 1-6
Safety Belts
.............................................1-10
Child Restraints
.......................................1-34
Air Bag System
.......................................1-70
Restraint System Check
............................1-81
Features and Controls..................................... 2-1
Keys
........................................................ 2-2
Doors and Locks
....................................... 2-7
Windows
.................................................2-16
Theft-Deterrent Systems
............................2-19
Starting and Operating Your Vehicle
...........2-20
Mirrors
....................................................2-32
OnStar
®System
......................................2-35
Storage Areas
.........................................2-36
Instrument Panel............................................. 3-1
Instrument Panel Overview
.......................... 3-4
Climate Controls
......................................3-19
Warning Lights, Gages, and Indicators
........3-24
Audio System(s)
.......................................3-42
Driving Your Vehicle....................................... 4-1
Your Driving, the Road, and Your Vehicle
..... 4-2
Towing
...................................................4-32Service and Appearance Care.......................... 5-1
Service
..................................................... 5-3
Fuel
......................................................... 5-5
Checking Things Under
the Hood
.............................................5-10
All-Wheel Drive
........................................5-48
Rear Axle
...............................................5-49
Front Axle
...............................................5-50
Noise Control System
...............................5-51
Bulb Replacement
....................................5-52
Windshield Wiper Blade Replacement
.........5-56
Tires
......................................................5-58
Appearance Care
.....................................5-92
Vehicle Identication
...............................5-100
Electrical System
....................................5-101
Capacities and Specications
...................5-106
Maintenance Schedule..................................... 6-1
Maintenance Schedule
................................ 6-2
Customer Assistance and Information.............. 7-1
Customer Assistance and Information
........... 7-2
Reporting Safety Defects
...........................7-11
Index................................................................ 1
2004 Chevrolet Express Owner ManualM

Outside Heated Mirrors
Your outside mirrors can
be defrosted by pressing
the button located near the
fan control.
An indicator light in the button will light while the heated
outside mirrors are activated.
Your rear window defogger comes on while the heated
mirrors are on. If your vehicle has a rear window
defogger, see “Rear Window Defogger” inClimate
Control System on page 3-19.
OnStar®System
Your vehicle may be equipped with the OnStar®
System. OnStar®uses global positioning system (GPS)
satellite technology, wireless communications, and
call centers to provide you with a wide range of safety,
security, information and convenience services.
A complete OnStar
®user’s guide and the terms and
conditions of the OnStar®Subscription Service
Agreement are included in your vehicle’s glove box
literature. For more information, visit www.onstar.com,
contact OnStar
®at 1-888-4-ONSTAR (1-888-466-7827),
or press the blue OnStar®button to speak to an
OnStar®advisor 24 hours a day, 7 days a week.
A completed Subscription Service Agreement is required
prior to delivery of OnStar
®services and prepaid
calling minutes are also required for OnStar®Personal
Calling and OnStar®Virtual Advisor use. Terms and
conditions of the Subscription Service Agreement can be
found at www.onstar.com.
2-35

Stabilitrak®Not Ready Light
If your vehicle has the
Stabilitrak®system, this
light will come on according
to the description table for
the Stabilitrak
®system. For
more information, see
Stabilitrak
®System on
page 4-9.
You will hear three chimes if the light turns on and one
chime if the light turns off.
Stabilitrak®Indicator Light
If you have the Stabilitrak®
system, this light will be on
or ashing, according to the
description table for the
Stabilitrak
®system. For
more information, see
Stabilitrak
®System on
page 4-9.
You will hear three chimes if the light turns on and one
chime if the light turns off.
If this light remains on steady, your vehicle needs to be
taken in for service.
3-33

Engine Coolant Temperature Gage
This gage shows the engine coolant temperature.
If the gage pointer moves into the red area your engine
is too hot!
It means that your engine coolant has overheated.
If you have been operating your vehicle under normal
operating conditions, you should pull off the road, stop
your vehicle, and turn off the engine as soon as possible.
SeeEngine Overheating on page 5-26.
Malfunction Indicator Lamp
Check Engine Light
Your vehicle is equipped
with a computer which
monitors operation of the
fuel, ignition, and emission
control systems.
This system is called OBD II (On-Board Diagnostics-
Second Generation) and is intended to assure that
emissions are at acceptable levels for the life of the
vehicle, helping to produce a cleaner environment.
The Check Engine light comes on to indicate that there is
a problem and service is required. Malfunctions often will
be indicated by the system before any problem is
apparent. This may prevent more serious damage to your
vehicle. This system is also designed to assist your
service technician in correctly diagnosing any
malfunction. United States
Canada
3-34

Reduced Engine Power Light
If the check engine and
reduced engine power
lights are on, the throttle
may be disabled and
a noticeable reduction in
the vehicle’s performance
may occur.
If the reduced engine power light is on, but there is no
reduction in performance, proceed to your destination.
The performance may be reduced the next time
the vehicle is driven. The vehicle may be driven at a
reduced speed while the reduced engine power light is
on, but acceleration and speed may be reduced.
Anytime the check engine light stays on, the vehicle
should be taken to an authorized GM dealer as soon as
possible for service.
Daytime Running Lamps Indicator
Light
You have this light on the
instrument panel. It will
light whenever the DRL are
on. It is also a reminder
to turn on your headlamps
when driving at night.
Tow/Haul Mode Light
This message is displayed
when the tow/haul mode
has been activated.
For more information, see “Tow/Haul Mode” inTowing a
Trailer on page 4-38.
3-40

4. Insert the scrubbing action cleaning cassette.
5. Eject the cleaning cassette after the manufacturer’s
recommended cleaning time.
When the cleaning cassette has been ejected, the
cut tape detection feature will be active again.
A non-scrubbing action, wet-type cleaner which uses a
cassette with a fabric belt to clean the tape head
can be used. This type of cleaning cassette will not
eject on its own. A non-scrubbing action cleaner may not
clean as thoroughly as the scrubbing type cleaner.
The use of a non-scrubbing action, dry-type cleaning
cassette is not recommended.
After the player is cleaned, press and hold the eject
button for ve seconds to reset the CLEAN indicator.
The radio will display --- or CLEANED to show the
indicator was reset.Cassettes are subject to wear and the sound quality
may degrade over time. Always make sure the cassette
tape is in good condition before the tape player is
serviced.
Care of Your CDs
Handle CDs carefully. Store them in their original cases
or other protective cases and away from direct
sunlight and dust. If the surface of a CD is soiled,
dampen a clean, soft cloth in a mild, neutral detergent
solution and clean it, wiping from the center to the edge.
Be sure never to touch the side without writing when
handling CDs. Pick up CDs by grasping the outer edges
or the edge of the hole and the outer edge.
3-74

Stabilitrak®System
If your vehicle has Stabilitrak®, it combines antilock
brake, traction and stability control systems and helps
the driver maintain directional control of the vehicle
in most driving conditions.
When you rst start your vehicle and begin to drive
away, the system performs several diagnostic checks to
insure that it is working properly. You may hear or
feel the system working. This is normal and does notmean there is a problem with your vehicle. The system
should initialize before the vehicle reaches 20 mph
(32 km/h). In some cases, it may take approximately two
miles (3.2 km) of driving before the system initializes.
The following chart describes the Stabilitrak
®not ready
light and the Stabilitrak®indicator light.
Stabilitrak®Not Ready Light Stabilitrak®Indicator Light Meaning
Off OffStabilitrak®is enabled,
but not active.
The traction control is not active.
Off FlashingStabilitrak
®is active, or the traction
control is active.
Off OnStabilitrak
®is disabled due to
system fault. When on after
restarting, the vehicle needs
to be serviced.
On OffStabilitrak
®is disabled due to
system initialization or the driver has
disabled with switch.
On FlashingStabilitrak
®is uninitialized
and not disabled.
The traction control is active.
4-9

For more information, seeStabilitrak®Not Ready Light
on page 3-33andStabilitrak®Indicator Light on
page 3-33.
Pressing and holding the
Stabilitrak
®button located
on the instrument panel
for more than ve seconds
can turn off Stabilitrak
®
and part of the traction
control system.
For your safety, the system can only be disabled when
the vehicle speed is less than 20 mph (32 km/h).
You will hear three chimes and the Stabilitrak
®not ready
light will come on.
To turn on the Stabilitrak
®system, press the Stabilitrak®
button again. Stabilitrak®will automatically turn back
on when the vehicle speed exceeds 20 mph (32 km/h).
You will hear one chime and the Stabilitrak
®not
ready light will turn off.
When the Stabilitrak
®system has been turned off you
may still hear system noises as a result of the
brake-traction control coming on.It is recommended to leave the system on for normal
driving conditions, but it may be necessary to turn
the system off if your vehicle is stuck in sand, mud, ice
or snow, and you want to “rock” your vehicle to
attempt to free it. SeeIf You Are Stuck: In Sand, Mud,
Ice or Snow on page 4-31.
Stabilitrak®System Operation
The Stabilitrak®system is normally on, except when the
system is initializing or has been disabled with the
Stabilitrak
®button. The Stabilitrak®system will
automatically activate to assist the driver in maintaining
vehicle directional control in most driving conditions.
When activated, the Stabilitrak
®system may reduce
engine power to the wheels and apply braking to
individual wheels as necessary to assist the driver with
vehicle directional control. If your vehicle is in cruise
control when the system activates, a Stabilitrak
®
indicator light on the instrument panel will ash, and the
cruise control will automatically disengage. When the
Stabilitrak
®system is no longer active, you may
re-engage the cruise control. See “Cruise Control” under
Turn Signal/Multifunction Lever on page 3-8.
The Stabilitrak
®system may also turn off automatically
if it determines that a problem exists with the system.
If the problem does not clear itself after restarting
the vehicle, you should see your dealer for service.
4-10