2004 CHEVROLET CLASSIC ECU

Fuses and Circuit Breakers
The wiring circuits in your vehicle are protected from
short circuits by a combination of fuses, circuit breakers
and fusible thermal links in the wiring itself.
Look at the silver-colored band inside the fuse. If the
band is broken or melted, replace the fuse. Be sure you
replace a bad fuse with a new one of the identical
size and rating.
If you ever have a problem on the road and don’t have
a spare fuse, you can borrow one that has the same
amperage. Just pick a feature of your vehicle that
you can get along without – like the radio or cigarette
lighter – and use its fuse, if it is the correct amperage.
Replace it as soon as you can.
There are three fuse blocks in your vehicle: two
instrument panel fuse blocks and the engine
compartment fuse block.
There is a fuse puller located on the engine
compartment fuse block. It can be used to easily
remove fuses from the fuse block.The instrument panel fuse
blocks are located at each
end of the instrument
panel. To access
the fuses, open the fuse
panel door by pulling out.
To reinstall the door, insert the hooks at the front end
first, then push the door into the instrument panel
to secure it.
5-90

Body Lubrication Service..................................6-17
Brake
Parking......................................................2-23
System Inspection.......................................6-21
System Warning Light..................................3-27
Brake Adjustment............................................5-37
Brake Fluid....................................................5-34
Brake Pedal Travel.........................................5-37
Brake Wear...................................................5-36
Brakes..........................................................5-34
Braking........................................................... 4-6
Braking in Emergencies..................................... 4-8
Break-In, New Vehicle.....................................2-16
Bulb Replacement...........................................5-45
Center High-Mounted Stoplamp (CHMSL)........5-47
Front Turn Signal Lamps..............................5-47
Halogen Bulbs............................................5-45
Headlamps.................................................5-45
Replacement Bulbs......................................5-50
Taillamps, Turn Signal, Stoplamps and
Back-up Lamps........................................5-48
Buying New Tires...........................................5-62
C
California Fuel.................................................. 5-5
Capacities and Specifications............................5-95
Carbon Monoxide...................4-23, 4-38, 2-11, 2-27Care of
Safety Belts................................................5-83
Your Cassette Tape Player............................3-55
Your CD Player...........................................3-56
Your CDs ...................................................3-56
Cassette Tape Messages.................................3-50
Cassette Tape Player Service...........................6-16
CD Adapter Kits.............................................3-51
CD Messages........................................3-42, 3-53
Center Console Storage Area...........................2-31
Center High-Mounted Stoplamp (CHMSL)...........5-47
Center Rear Passenger Position, Safety Belts.....1-27
Chains, Tires..................................................5-66
Charging System Light....................................3-27
Check Engine Light.........................................3-30
Checking Coolant............................................5-21
Checking Engine Oil........................................5-13
Checking Your Restraint Systems......................1-62
Chemical Paint Spotting...................................5-86
Child Restraints
Child Restraint Systems...............................1-39
Infants and Young Children...........................1-35
Lower Anchorages and Top Tethers for
Children (LATCH System)..........................1-45
Older Children.............................................1-32
Securing a Child Restraint Designed for the
LATCH System........................................1-48
Securing a Child Restraint in a Center Rear
Seat Position...........................................1-50
2

Child Restraints (cont.)
Securing a Child Restraint in a Rear Outside
Seat Position...........................................1-48
Securing a Child Restraint in the Right Front
Seat Position...........................................1-52
Top Strap...................................................1-43
Top Strap Anchor Location............................1-45
Where to Put the Restraint...........................1-42
Chime Level Adjustment..................................3-56
Cigarette Lighter.............................................3-17
Cleaning
Inside of Your Vehicle..................................5-80
Outside of Your Vehicle................................5-83
Underbody Maintenance...............................5-86
Weatherstrips..............................................5-83
Cleaning Aluminum Wheels..............................5-85
Cleaning Exterior Lamps/Lenses.......................5-84
Cleaning Fabric/Carpet....................................5-80
Cleaning Glass Surfaces..................................5-82
Cleaning Interior Plastic Components.................5-82
Cleaning Leather............................................5-82
Cleaning the Top of the Instrument Panel...........5-82
Cleaning Tires................................................5-85
Cleaning Vinyl................................................5-82
Cleaning Windshield and Wiper Blades..............5-84
Climate Control System...................................3-18
Outlet Adjustment........................................3-21Compact Spare Tire........................................5-79
Control of a Vehicle.......................................... 4-5
Coolant
Engine Temperature Gage............................3-29
Heater, Engine............................................2-19
Low Warning Light.......................................3-29
Surge Tank Pressure Cap.............................5-22
Cooling System..............................................5-25
Cruise Control................................................3-10
Cupholder(s)..................................................2-31
Current and Past Model Order Forms................7-12
Customer Assistance Information
Courtesy Transportation.................................. 7-7
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................................................ 7-5
Reporting Safety Defects to General Motors.......7-11
Reporting Safety Defects to the United States
Government............................................7-11
Roadside Assistance Program......................... 7-6
Service Publications Ordering Information........7-11
Customizing the Automatic Door Locks................ 2-9
3

D
Daytime Running Lamps (DRL).........................3-13
Defensive Driving............................................. 4-2
Defogging and Defrosting.................................3-20
Delayed Headlamps........................................3-14
Delayed Locking............................................... 2-8
Dinghy Towing................................................4-30
Doing Your Own Service Work........................... 5-3
Dolly Towing..................................................4-32
Dome Lamp...................................................3-15
Door
Ajar Light...................................................3-34
Delayed Locking........................................... 2-8
Door Ajar Reminder....................................... 2-8
Locks.......................................................... 2-7
Power Door Locks......................................... 2-8
Programmable Automatic Door Locks............... 2-9
Rear Door Security Locks.............................2-10
Driver
Position, Safety Belt.....................................1-14
Six-Way Power Seat...................................... 1-3
Driving
At Night.....................................................4-14
City...........................................................4-18
Defensive..................................................... 4-2
Drunken....................................................... 4-2
Freeway.....................................................4-19Driving (cont.)
Hill and Mountain Roads..............................4-22
In Rain and on Wet Roads...........................4-15
Winter........................................................4-23
Driving On Grades..........................................4-43
Driving on Snow or Ice....................................4-24
Driving Through Deep Standing Water...............4-17
Driving Through Flowing Water.........................4-17
Driving with a Trailer.......................................4-42
E
Electrical System
Add-On Equipment......................................5-89
Fuses and Circuit Breakers...........................5-90
Headlamp Wiring.........................................5-89
Power Windows and Other Power Options......5-89
Windshield Wiper Fuses...............................5-89
Emergency Trunk Release Handle.....................2-12
Emissions Inspection and Maintenance
Programs...................................................3-32
Engine
Air Cleaner/Filter.........................................5-17
Battery.......................................................5-38
Check and Service Engine Soon Light............3-30
Coolant......................................................5-19
Coolant Heater............................................2-19
4

Inspection
Brake System.............................................6-21
Engine Cooling System................................6-21
Exhaust System..........................................6-20
Fuel System...............................................6-20
Part C - Periodic Maintenance.......................6-20
Steering, Suspension and Front Drive Axle
Boot and Seal.........................................6-20
Throttle System...........................................6-21
Instrument Panel
Cluster.......................................................3-23
Overview..................................................... 3-2
Instrument Panel Brightness.............................3-15
Instrument Panel Fuse Block
(Passenger’s Side).......................................5-92
Instrument Panel Fuse Block
(Driver’s Side).............................................5-91
Interior Lamps................................................3-15
J
Jump Starting.................................................5-39
K
Key Lock Cylinders Service..............................6-17
Keyless Entry System....................................... 2-3
Keys............................................................... 2-2
L
Lamps
Exterior......................................................3-13
Interior.......................................................3-15
Lap Belt........................................................1-28
Lap-Shoulder Belt...................................1-14, 1-24
LATCH System
Child Restraints...........................................1-45
Securing a Child Restraint Designed for the
LATCH System........................................1-48
Leaving Your Vehicle.......................................2-11
Leaving Your Vehicle With the Engine
Running.....................................................2-25
Light
Air Bag Readiness.......................................3-26
Anti-Lock Brake System Warning...................3-28
Brake System Warning.................................3-27
Charging System.........................................3-27
Door Ajar...................................................3-34
Low Coolant Warning...................................3-29
Low Washer Fluid Warning...........................3-34
Malfunction Indicator....................................3-30
Oil Pressure...............................................3-33
Passlock
®Warning.......................................3-34
Safety Belt Reminder...................................3-25
Service Vehicle Soon...................................3-35
Loading Your Vehicle.......................................4-32
Lockout Protection..........................................2-11
7

Locks
Delayed Locking........................................... 2-8
Door........................................................... 2-7
Leaving Your Vehicle....................................2-11
Lockout Protection.......................................2-11
Power Door.................................................. 2-8
Programmable Automatic Door Locks............... 2-9
Rear Door Security Locks.............................2-10
Long Trip/Highway Definition.............................. 6-6
Long Trip/Highway Intervals............................... 6-6
Long Trip/Highway Scheduled Maintenance........6-12
Loss of Control...............................................4-13
Low Coolant Warning Light..............................3-29
Low Washer Fluid Warning Light.......................3-34
M
Maintenance, Normal Replacement Parts............5-96
Maintenance Schedule
At Each Fuel Fill.........................................6-16
At Least Once a Month................................6-16
At Least Once a Year..................................6-17
At Least Twice a Year..................................6-17
Brake System Inspection..............................6-21
Engine Cooling System Inspection.................6-21
Exhaust System Inspection...........................6-20
Fuel System Inspection................................6-20Maintenance Schedule (cont.)
How This Section is Organized....................... 6-3
Introduction.................................................. 6-2
Long Trip/Highway Scheduled Maintenance.......6-12
Maintenance Requirements............................. 6-2
Part A - Scheduled Maintenance Services......... 6-4
Part B - Owner Checks and Services.............6-16
Part C - Periodic MaintenanceInspections......6-20
Part D - Recommended Fluids and
Lubricants...............................................6-22
Part E - Maintenance Record........................6-23
Selecting the Right Schedule.......................... 6-5
Short Trip/City Scheduled Maintenance............. 6-6
Steering, Suspension and Front Drive Axle
Boot and Seal Inspection..........................6-20
Throttle System Inspection............................6-21
Using Your................................................... 6-4
Your Vehicle and the Environment................... 6-2
Maintenance When Trailer Towing.....................4-44
Making Turns.................................................4-42
Malfunction Indicator Light................................3-30
Manual Seats................................................... 1-2
Matching Transmitter(s) to Your Vehicle............... 2-5
Mexico, Central America and Caribbean
Islands/Countries (Except Puerto Rico
and U.S. Virgin Islands) – Customer
Assistance................................................... 7-5
8

Reporting Safety Defects
General Motors...........................................7-11
United States Government............................7-11
Restraint System Check...................................6-17
Checking Your Restraint Systems...................1-62
Replacing Restraint System Parts After
a Crash..................................................1-63
Restraint Systems
Checking....................................................1-62
Replacing Parts...........................................1-63
Retained Accessory Power (RAP)......................2-18
Right Front Passenger Position, Safety Belts......1-23
Roadside
Assistance Program....................................... 7-6
Rocking Your Vehicle To Get It Out...................4-29
Running Your Engine While You Are Parked.......2-28
S
Safety Belt
Reminder Light............................................3-25
Safety Belts
Care of......................................................5-83
Center Rear Passenger Position....................1-27
Driver Position............................................1-14
How to Wear Safety Belts Properly................1-13
Questions and Answers About Safety Belts.....1-12Safety Belts (cont.)
Rear Safety Belt Comfort Guides for Children
and Small Adults......................................1-29
Rear Seat Passengers.................................1-23
Right Front Passenger Position......................1-23
Safety Belt Extender....................................1-31
Safety Belt Use During Pregnancy.................1-22
Safety Belts Are for Everyone......................... 1-8
Safety Chains.................................................4-41
Safety Warnings and Symbols.............................. iii
Seats
Head Restraints............................................ 1-6
Manual........................................................ 1-2
Rear Seat Operation...................................... 1-6
Reclining Seatbacks...................................... 1-4
Six-Way Power Driver.................................... 1-3
Second-Gear Start..........................................2-23
Securing a Child Restraint
Center Rear Seat Position............................1-50
Designed for the LATCH System...................1-48
Rear Outside Seat Position...........................1-48
Right Front Seat Position..............................1-52
Selecting the Right Schedule, Maintenance.......... 6-5
Service........................................................... 5-3
Adding Equipment to the Outside of Your
Vehicle..................................................... 5-4
Doing Your Own Work................................... 5-3
Engine Soon Light.......................................3-30
11