2004 CHEVROLET IMPALA headlamp

Electrical System
Add-On Electrical Equipment
Notice:Don’t add anything electrical to your
vehicle unless you check with your dealer rst.
Some electrical equipment can damage your vehicle
and the damage wouldn’t be covered by your
warranty. Some add-on electrical equipment can
keep other components from working as they
should.
Your vehicle has an air bag system. Before attempting
to add anything electrical to your vehicle, see
Servicing Your Air Bag-Equipped Vehicle on page 1-60.
Headlamp Wiring
The headlamp circuit is protected by individual fuses in
the underhood fuse block. An electrical overload will
cause the fuse to blow. If this happens, have your
headlamp system checked right away.
Windshield Wiper Fuses
The windshield wiper motor is protected by a circuit
breaker and a fuse. If the motor overheats due to heavy
snow, etc., the wiper will stop until the motor cools.
If the overload is caused by some electrical problem,
have it xed.
Power Windows and Other Power
Options
A circuit breaker in the driver’s side instrument panel
fuse block protects the power windows and other power
accessories. When the current load is too heavy, the
circuit breaker opens and closes, protecting the
circuit until the problem is xed.
Fuses and Circuit Breakers
The wiring circuits in your vehicle are protected from
short circuits by a combination of fuses. This greatly
reduces the chance of res caused by electrical
problems.
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.
5-103

Fuses Usage
ABS/PCM Anti-Lock Brake System, Powertrain
Control Module, Brake Switch,
Crank Relay, Canister Vent Solenoid
(Run, Crank)
STOPBrake Lamps, Body Control Module
(Run, Crank)
TURN SIGNAL Turn Signal Flashers
CRUISECruise Control Steering Column
Controls
AC/CRUISEHVAC Temp Door Motors & Module,
Cruise Control Module
A/C FAN HVAC Blower
STR COL Steering Wheel Lighting
DR LKBody Control Module, Door Lock
Controls
PWR MIR Power Mirrors
CLSTR/BCMCluster, Body Control Module,
Data Link Connector (Battery)
LH HTD
ST/BCMDriver’s Heated Seat, Body Control
Module, Battery Controlled LoadsCircuit
BreakersUsage
RETAINED
ACCESSORY
PWR BRKRPower Window, Sunroof Breaker
Relays Usage
HEADLAMP
RELAYHeadlamp Relay
RETAINED
ACCESSORY
PWR RELAYRetained Accessory Power Relay
5-105

Underhood Fuse Block (Upper)
Some fuses are in a fuse block in the engine
compartment on the passenger’s side of the vehicle.
SeeEngine Compartment Overview on page 5-12
for more information on location.
Relays Usage
FUEL PUMP Fuel Pump
DRL RELAY Daytime Running Lamps
Relays Usage
CRANK RLY Starter (Crank) Relay
HORNS Horn
FOG LTS Fog Lamps
Fuses Usage
LEFT I/P Left Fuse Block
RT I/P #1 Right Fuse Block (Battery)
RT I/P #2 Right Fuse Block (Battery)
U/HOOD #1 Underhood (Top) Fuse Block
HORN RLY Horn Relay
BLANK Blank
BLANK Blank
FOG RLY Fog Lamps Relay
F/PMP RLY Fuel Pump Relay
DRL/EXIT LTSLow (Left Front) & High
(Left Front) Headlamps
EXT LTSLow (Right Front) & High
(Right Front) Headlamps
PCM PCM Battery
A/C RLY
(COMP)HVAC Compressor Relay &
Generator
BLOWER
MOTORHVAC Blower Motor
5-108

Audio System(s) (cont.)
Theft-Deterrent Feature................................3-92
Understanding Radio Reception.....................3-94
Vehicle Customization Settings......................3-97
XM™ Satellite Radio Antenna System............3-97
AUTOLOCK (Automatic Door Lock and Unlock) . . . 2-46
Automatic Transaxle
Fluid..........................................................5-26
Operation...................................................2-22
B
Backglass Antenna..........................................3-96
Backing Up....................................................4-41
Battery..........................................................5-50
Battery Replacement......................................... 2-7
Battery Rundown Protection.............................3-18
Battery Warning Message................................3-45
Before Leaving on a Long Trip.........................4-22
Brake
Low Fluid Warning Message.........................3-51
Parking......................................................2-26
System Warning Light..................................3-33
Brake Fluid....................................................5-47
Brake Wear...................................................5-49
Brakes..........................................................5-47
Braking........................................................... 4-6Braking in Emergencies..................................... 4-8
Break-In, New Vehicle.....................................2-17
Bulb Replacement...........................................5-58
Back-Up Lamps...........................................5-62
Halogen Bulbs............................................5-58
Headlamp Aiming........................................5-58
Headlamps, Front Turn Signal,
and Parking Lamps..................................5-59
Replacement Bulbs......................................5-62
Taillamps, Turn Signal, Stoplamps and
Sidemarker Lamps...................................5-61
Buying New Tires...........................................5-76
C
California Fuel.................................................. 5-6
Canada – Customer Assistance.......................... 7-4
Canadian Owners................................................ ii
Canadian Roadside Assistance........................... 7-7
Capacities and Specications..........................5-110
Carbon Monoxide...................4-25, 4-37, 2-11, 2-31
Care of
Safety Belts................................................5-97
Your Cassette Tape Player............................3-94
Your CD Player...........................................3-96
Your CDs ...................................................3-96
2

Compact Spare Tire........................................5-93
Compass Variance..........................................3-53
Console Shift Lever.........................................2-28
Content Theft-Deterrent....................................2-15
Control of a Vehicle.......................................... 4-5
Convenience Net............................................2-42
Coolant
Engine Temperature Gage............................3-36
Heater, Engine............................................2-20
Hot Temperature Warning Message................3-45
Cooling System..............................................5-35
Courtesy Lamps.............................................3-17
Cruise Control................................................3-11
Cruise Control Light........................................3-41
Current and Past Model Order Forms................7-13
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....7-11Customer Assistance Information (cont.)
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/Automatic Headlamp
System......................................................3-15
Defensive Driving............................................. 4-2
Defogging and Defrosting.................................3-23
Delayed Entry Lighting.....................................3-17
Delayed Exit Lighting.......................................3-18
Delayed Headlamps........................................3-16
Dinghy Towing................................................4-31
Disarming with the Remote Keyless Entry
Transmitter.................................................2-16
Disarming with Your Key..................................2-16
Doing Your Own Service Work........................... 5-4
Dolly Towing..................................................4-31
Dome Lamp...................................................3-18
4

Door
Ajar Warning Message.................................3-48
Locks.......................................................... 2-8
Power Door Locks......................................... 2-9
Programmable Automatic Door Locks.............2-10
Driver
Position, Safety Belt.....................................1-14
Driver Information Center (DIC).........................3-52
Driver’s Side Instrument Panel Fuse Block........5-104
Driving
At Night.....................................................4-15
City...........................................................4-20
Defensive..................................................... 4-2
Drunken....................................................... 4-2
Freeway.....................................................4-21
Hill and Mountain Roads..............................4-23
In Rain and on Wet Roads...........................4-17
Winter........................................................4-25
Driving On Grades..........................................4-42
Driving on Snow or Ice....................................4-26
Driving Through Deep Standing Water...............4-18
Driving Through Flowing Water.........................4-19
Driving with a Trailer.......................................4-41
Dual Climate Control System............................3-20E
Electrical System
Add-On Equipment.....................................5-103
Fuses and Circuit Breakers.........................5-103
Headlamp Wiring.......................................5-103
Power Windows and Other Power Options....5-103
Windshield Wiper Fuses.............................5-103
Emergency Trunk Release Handle.....................2-12
Emissions Inspection and Maintenance
Programs...................................................3-40
Engine
Air Cleaner/Filter.........................................5-25
Battery.......................................................5-50
Change Oil Message...................................3-47
Check and Service Engine Soon Light............3-37
Coolant......................................................5-29
Coolant Heater............................................2-20
Coolant Temperature Gage...........................3-36
Drive Belt Routing.......................................6-14
Engine Compartment Overview......................5-12
Exhaust.....................................................2-31
Low Oil Level Message................................3-47
Oil .............................................................5-18
5

G
Gage
Engine Coolant Temperature.........................3-36
Fuel..........................................................3-42
Speedometer..............................................3-30
Tachometer.................................................3-31
Garage Door Opener.......................................2-38
Gasoline
Octane........................................................ 5-5
Specications............................................... 5-5
Gate Operator and Canadian Programming........2-40
Glove Box.....................................................2-42
GM Mobility Program for Persons with
Disabilities.................................................... 7-5
H
Hazard Warning Flashers................................... 3-6
Head Restraints............................................... 1-6
Headlamp
Aiming.......................................................5-58
Headlamp High/Low-Beam Changer.................... 3-8
Headlamp Wiring...........................................5-103
Headlamps
Bulb Replacement.......................................5-58
Halogen Bulbs............................................5-58
Headlamps, Front Turn Signal, and Parking
Lamps....................................................5-59Heated Outside Mirrors....................................2-36
Heated Seats................................................... 1-4
Highbeam Out Warning Message......................3-52
Highway Hypnosis...........................................4-23
Hill and Mountain Roads..................................4-23
Hitches..........................................................4-40
HomeLink
®Transmitter....................................2-38
HomeLink®Transmitter, Programming................2-38
Hood
Checking Things Under................................5-10
Release.....................................................5-11
Horn............................................................... 3-7
Hot Coolant Temperature Warning Message........3-45
How to Add Coolant to the Coolant
Recovery Tank............................................5-37
How to Add Coolant to the Radiator..................5-40
How to Add Fluid............................................5-29
How to Check........................................5-27, 5-72
How to Check and Add Oil...............................5-24
How to Check Power Steering Fluid..................5-45
How to Inspect the Engine Air Cleaner/Filter.......5-25
How to Use This Manual...................................... ii
How to Wear Safety Belts Properly...................1-14
Hydroplaning..................................................4-18
7

Locks (cont.)
Lockout Protection.......................................2-10
Power Door.................................................. 2-9
Programmable Automatic Door Locks.............2-10
Loss of Control...............................................4-14
Low Brake Fluid Warning Message....................3-51
Low Engine Oil Level Message.........................3-47
Low Fuel Warning Message.............................3-50
Low Oil Pressure Message...............................3-46
Low Tire Message..........................................3-48
Low Washer Fluid Warning Message.................3-50
LT DELAY (Delayed Headlamp Illumination)........2-46
Lumbar
Manual Controls............................................ 1-3
M
Maintenance Schedule
Additional Required Services........................... 6-6
At Each Fuel Fill........................................... 6-9
At Least Once a Month.................................. 6-9
At Least Once a Year..................................6-10
Introduction.................................................. 6-2
Maintenance Footnotes.................................. 6-7
Maintenance Record....................................6-15
Maintenance Requirements............................. 6-2
Normal Maintenance Replacement Parts.........6-13Maintenance Schedule (cont.)
Owner Checks and Services........................... 6-9
Recommended Fluids and Lubricants.............6-12
Scheduled Maintenance................................. 6-4
Using Your................................................... 6-2
Your Vehicle and the Environment................... 6-2
Maintenance When Trailer Towing.....................4-43
Making Turns.................................................4-42
Malfunction Indicator Light................................3-37
Manual Lumbar Controls.................................... 1-3
Manual Operation...........................................3-21
Manual Seats................................................... 1-2
Matching Transmitter(s) to Your Vehicle............... 2-6
Message
Battery Warning..........................................3-45
Center.......................................................3-43
Change Engine Oil......................................3-47
Door Ajar Warning.......................................3-48
Highbeam Out Warning................................3-52
Hot Coolant Temperature Warning..................3-45
Low Brake Fluid Warning..............................3-51
Low Engine Oil Level...................................3-47
Low Fuel Warning.......................................3-50
Low Oil Pressure.........................................3-46
Low Tire .....................................................3-48
Low Washer Fluid Warning...........................3-50
Security.....................................................3-49
9