2004 CHEVROLET EXPRESS service indicator

Gasolines containing oxygenates, such as ethers and
ethanol, and reformulated gasolines may be available in
your area to contribute to clean air. General Motors
recommends that you use these gasolines, particularly if
they comply with the specications described earlier.
Notice:Your vehicle was not designed for fuel that
contains methanol. Do not use fuel containing
methanol. It can corrode metal parts in your fuel
system and also damage the plastic and rubber
parts. That damage would not be covered under
your warranty.
Some gasolines that are not reformulated for
low emissions may contain an octane-enhancing
additive called methylcyclopentadienyl manganese
tricarbonyl (MMT); ask the attendant where you
buy gasoline whether the fuel contains MMT. General
Motors does not recommend the use of such gasolines.
Fuels containing MMT can reduce the life of spark
plugs and the performance of the emission control
system may be affected. The malfunction indicator lamp
may turn on. If this occurs, return to your authorized
GM dealer for service.Fuels in Foreign Countries
If you plan on driving in another country outside the
United States or Canada, the proper fuel may be hard
to nd. Never use leaded gasoline or any other fuel
not recommended in the previous text on fuel. Costly
repairs caused by use of improper fuel would not
be covered by your warranty.
To check the fuel availability, ask an auto club, or
contact a major oil company that does business in the
country where you will be driving.
5-7

Brake Wear
Your vehicle has four-wheel disc brakes.
Disc brake pads have built-in wear indicators that make
a high-pitched warning sound when the brake pads
are worn and new pads are needed. The sound
may come and go or be heard all the time your vehicle
is moving, except when you are pushing on the
brake pedal rmly.
{CAUTION:
The brake wear warning sound means that
soon your brakes will not work well. That
could lead to an accident. When you hear the
brake wear warning sound, have your vehicle
serviced.
Notice:Continuing to drive with worn-out brake
pads could result in costly brake repair.Some driving conditions or climates may cause a brake
squeal when the brakes are rst applied or lightly
applied. This does not mean something is wrong with
your brakes.
Properly torqued wheel nuts are necessary to help
prevent brake pulsation. When tires are rotated, inspect
brake pads for wear and evenly tighten wheel nuts in
the proper sequence to GM torque specications.
Brake linings should always be replaced as complete
axle sets.
Brake Pedal Travel
See your dealer if the brake pedal does not return to
normal height, or if there is a rapid increase in
pedal travel. This could be a sign of brake trouble.
Brake Adjustment
Every time you make a brake stop, your disc brakes
adjust for wear.
5-36

When It Is Time for New Tires
One way to tell when it’s
time for new tires is to
check the treadwear
indicators, which will
appear when your tires
have only 1/16 inch
(1.6 mm) or less of tread
remaining. Some
commercial truck tires may
not have treadwear
indicators.
You need a new tire if any of the following statements
are true:
You can see the indicators at three or more places
around the tire.
You can see cord or fabric showing through the
tire’s rubber.
The tread or sidewall is cracked, cut or snagged
deep enough to show cord or fabric.
The tire has a bump, bulge or split.
The tire has a puncture, cut or other damage that
can’t be repaired well because of the size or
location of the damage.
Buying New Tires
To nd out what kind and size of tires you need, look at
the Certication/Tire label or the Tire and Loading
Information label. For examples of these labels and their
location on your vehicle, seeLoading Your Vehicle on
page 4-29.
The tires installed on your vehicle when it was new had
a Tire Performance Criteria Specication (TPC Spec)
number on each tire’s sidewall. When you get new tires,
General Motors recommends that you get tires with
that same TPC Spec number. That way your vehicle will
continue to have tires that are designed to give proper
endurance, handling, speed rating, load range, traction,
ride and other things during normal service on your
vehicle. If your tires have an all-season tread design,
the TPC number will be followed by an “MS” (for mud
and snow).
If you replace your tires with those not having a TPC
Spec number, make sure they are the same size, load
range, speed rating and construction type (bias,
bias-belted or radial) as your original tires.
5-62

Scheduled Maintenance
Service MaintenanceIMaintenanceII
Change engine oil and lter. SeeEngine Oil on page 5-13. Reset oil
life system. SeeEngine Oil Life System on page 5-16.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 5-17.An Emission Control
Service. See footnotes † and (l).•
Rotate tires and check ination pressures and wear. SeeTires on page 5-52.••
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 (4 536 kg) only.See
footnote (g).•
Inspect throttle system.See footnote (m).•
6-5

Additional Required Services
The following services should be performed at the rst maintenance service (IorII) after the indicated miles
(kilometers) shown for each item.
Additional Required Services
Service and Miles (Kilometers)25,000
(41 500)50,000
(83 000)75,000
(125 000)100,000
(166 000)125,000
(207 500)150,000
(240 000)
Inspect fuel system for damage
or leaks.••••••
Inspect exhaust system for loose or
damaged components.••••••
Vehicles without a lter restriction
indicator: Replace engine air cleaner
lter. SeeEngine Air Cleaner/Filter on
page 5-17.An Emission Control
Service.•••
Change automatic transmission uid
and lter (severe service).See
footnote (h).•••
Change automatic transmission uid
and lter (normal service).•
6-6

D
Daytime Running Lamps..................................3-14
Daytime Running Lamps Indicator Light.............3-37
Defensive Driving............................................. 4-2
Doing Your Own Service Work........................... 5-4
Dome Lamp Override......................................3-15
Dome Lamps.................................................3-15
Door
60/40 Swing-Out Side Door...........................2-12
Cargo Door Relocking.................................... 2-8
Locks.......................................................... 2-7
Power Door Locks......................................... 2-8
Rear Door Security Locks............................... 2-8
Rear Doors.................................................2-13
Sliding Side Door........................................2-10
Driver
Position, Safety Belt.....................................1-15
Driving
At Night.....................................................4-15
City...........................................................4-19
Defensive..................................................... 4-2
Drunken....................................................... 4-2
Freeway.....................................................4-20
Hill and Mountain Roads..............................4-22
In Rain and on Wet Roads...........................4-16
Rocking Your Vehicle to Get it Out.................4-28
Winter........................................................4-24
Dual Tire Operation.........................................5-59
E
Electrical System
Add-On Equipment......................................5-92
Engine Compartment Fuse Block...................5-94
Floor Console Fuse Block.............................5-93
Fuses and Circuit Breakers...........................5-92
Headlamp Wiring.........................................5-92
Windshield Wiper Fuses...............................5-92
Engine
Air Cleaner/Filter.........................................5-17
Battery.......................................................5-37
Change Engine Oil Light...............................3-35
Check and Service Engine Soon Light............3-32
Coolant......................................................5-22
Coolant Heater............................................2-21
Coolant Temperature Gage...........................3-31
Engine Compartment Overview......................5-12
Exhaust.....................................................2-27
Fan Noise..................................................5-32
Fuel Regulator............................................2-20
Oil .............................................................5-13
Overheating................................................5-24
Reduced Power Light...................................3-37
Speed Limiter.............................................3-24
Starting......................................................2-20
Entry Lighting.................................................3-16
Event Data Recorders (EDR)............................. 7-9
Exit Lighting...................................................3-16
4

Light (cont.)
Brake System Warning.................................3-29
Change Engine Oil......................................3-35
Charging System.........................................3-28
Check Gages Warning.................................3-38
Cruise Control.............................................3-36
Daytime Running Lamps Indicator..................3-37
Highbeam On.............................................3-37
Malfunction Indicator....................................3-32
Reduced Engine Power................................3-37
Safety Belt Reminder...................................3-25
Security.....................................................3-36
Stabilitrak
®Indicator.....................................3-31
Stabilitrak®Not Ready..................................3-30
Tow/Haul Mode...........................................3-38
Lighting
Entry.........................................................3-16
Exit...........................................................3-16
Locking Rear Axle............................................ 4-7
Lockout Protection............................................ 2-9
Locks
Cargo Door Relocking.................................... 2-8
Door........................................................... 2-7
Lockout Protection......................................... 2-9
Power Door.................................................. 2-8
Rear Door Security Locks............................... 2-8
Loss of Control...............................................4-14
M
Maintenance Schedule
Additional Required Services........................... 6-6
At Each Fuel Fill.........................................6-10
At Least Once a Month................................6-10
At Least Once a Year..................................6-11
At the First 100, 1,000 and 6,000 Miles
(160, 1 600 and 10 000km).......................6-10
Introduction.................................................. 6-2
Maintenance Footnotes.................................. 6-8
Maintenance Record....................................6-16
Maintenance Requirements............................. 6-2
Normal Maintenance Replacement Parts.........6-15
Owner Checks and Services.........................6-10
Recommended Fluids and Lubricants.............6-13
Scheduled Maintenance................................. 6-4
Using Your................................................... 6-3
Your Vehicle and the Environment................... 6-2
Malfunction Indicator Light................................3-32
Manual Seats................................................... 1-3
Manual Windows............................................2-15
Mirrors
Manual Rearview Mirror................................2-29
Outside Camper-Type Mirrors........................2-29
Outside Convex Mirror.................................2-30
Outside Heated Mirrors................................2-31
7

Traction
Stabilitrak®System........................................ 4-8
Transmission
Fluid, Automatic...........................................5-19
Transmission Operation, Automatic....................2-22
Trip Odometer................................................3-24
Turn and Lane-Change Signals.......................... 3-8
Turn Signal/Multifunction Lever........................... 3-7
U
Understanding Radio Reception........................3-72
Uniform Tire Quality Grading............................5-63
V
Vehicle
Control........................................................ 4-5
Damage Warnings........................................... iv
Symbols......................................................... iv
Vehicle Data Collection and Event Data
Recorders.................................................... 7-9
Vehicle Identication
Number (VIN).............................................5-91
Service Parts Identication Label...................5-91
Ventilation Adjustment......................................3-20
Visors...........................................................2-17
Voltmeter Gage..............................................3-28
W
Warning Lights, Gages and Indicators................3-22
Warnings
Hazard Warning Flashers............................... 3-6
Other Warning Devices.................................. 3-6
Safety and Symbols......................................... iii
Vehicle Damage.............................................. iv
Wheels
Alignment and Tire Balance..........................5-64
Replacement...............................................5-65
Where to Put the Restraint...............................1-42
Windows.......................................................2-15
Manual......................................................2-15
Power........................................................2-16
Swing-Out Windows.....................................2-17
Windshield
Wiper Blades, Cleaning................................5-87
Windshield Washer.........................................3-10
Fluid..........................................................5-33
Windshield Wiper
Blade Replacement......................................5-51
Fuses........................................................5-92
Windshield Wipers......................................... 3-9
Winter Driving................................................4-24
Y
Your Vehicle and the Environment....................... 6-2
12