2005 CHEVROLET IMPALA headlamp

Headlamp Aiming
Headlamp aim has been preset at the factory and
should need no further adjustment.
If your vehicle is damaged in an accident, the headlamp
aim may be affected. Aim adjustment to the low-beam
headlamps may be necessary if it is difficult to see
the lane markers (for horizontal aim), or if oncoming
drivers ash their high-beam headlamps at you
(for vertical aim). If you believe your headlamps need
to be re-aimed, we recommend that you take your
vehicle to your dealer for service.
Bulb Replacement
For the proper type of replacement bulbs, see
Replacement Bulbs on page 5-58.
For any bulb changing procedure not listed in this
section, contact your dealer.
Halogen Bulbs
{CAUTION:
Halogen bulbs have pressurized gas inside and
can burst if you drop or scratch the bulb. You or
others could be injured. Be sure to read and
follow the instructions on the bulb package.
5-54

Headlamps, Front Turn Signal, and
Parking Lamps
A. Parking/Turn Signal Lamp
B. Low-Beam Headlamp
C. High-Beam HeadlampTo replace one of these bulbs, do the following:
1. Open the hood. SeeHood Release on page 5-11
for more information.
2. Remove the air baffle.
3. Remove the two headlamp fasteners by pulling up
on them.
5-55

4. Pull the headlamp assembly gently away from the
vehicle and remove the electrical connector.
5. Remove the round dust caps to gain access to
the bulbs.6. Turn the old bulb counterclockwise and remove it
from the retaining ring by gently pulling it away
from the headlamp.
7. Remove the electrical connector from the bulb by
raising the lock tab and pulling the connector away
from the bulb’s base.
8. Install the electrical connector to the bulb.
9. Install the new bulb by inserting the smallest tab on
the bulb base into the matching notch in the
retaining ring. Turn the bulb a quarter-turn clockwise
until it stops.
10. Reverse Steps 1 through 5 to reinstall the headlamp
assembly.
5-56

Back-Up Lamps
The back-up lamps are located in the applique, on the
rear of the trunk lid. To replace a bulb, do the following:
1. Open the trunk. SeeTrunk on page 2-10for
more information.
2. Remove the nine hex nuts.
3. Pull the rear trunk applique away from the vehicle.
4. Remove the socket. To do so, press the tab,
turn it counterclockwise and pull it out.
5. Pull the old bulb out. Do not twist it.
6. Push the new bulb into the socket.
7. Reinstall the socket in the assembly. Tighten the
socket by turning it clockwise.
8. Reinstall the applique and the nine hex nuts.
Replacement Bulbs
Exterior Lamp Bulb Number
Back-Up 921
Fog Lamp TBD
Front Parking/Turn Signal3357NAK or
3457NAK
Headlamps
High-beam 9005
Low-beam 9006
Stoplamps, Taillamps, and
Turn Signal3057
For replacement bulbs not listed here, contact your
dealer.
5-58

Each new wheel should have the same load-carrying
capacity, diameter, width, offset and be mounted
the same way as the one it replaces.
If you need to replace any of your wheels, wheel bolts
or wheel nuts, replace them only with new GM
original equipment parts. This way, you will be sure to
have the right wheel, wheel bolts and wheel nuts
for your vehicle.
{CAUTION:
Using the wrong replacement wheels, wheel
bolts or wheel nuts on your vehicle can be
dangerous. It could affect the braking and
handling of your vehicle, make your tires lose
air and make you lose control. You could have
a collision in which you or others could be
injured. Always use the correct wheel, wheel
bolts and wheel nuts for replacement.Notice:The wrong wheel can also cause problems
with bearing life, brake cooling, speedometer or
odometer calibration, headlamp aim, bumper height,
vehicle ground clearance and tire or tire chain
clearance to the body and chassis.
SeeChanging a Flat Tire on page 5-78for more
information.
Used Replacement Wheels
{CAUTION:
Putting a used wheel on your vehicle is
dangerous. You cannot know how it has been
used or how far it has been driven. It could fail
suddenly and cause a crash. If you have to
replace a wheel, use a new GM original
equipment wheel.
5-75

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 airbag system. Before attempting to
add anything electrical to your vehicle, seeServicing
Your Airbag-Equipped Vehicle on page 1-58.
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 and circuit
breakers. 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.
5-99

Fuses Usage
BCM Body Control Module (Accessory)
AIRBAG Airbag System
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)
TRN/SIG 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 LightingFuses Usage
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 Loads
Relays Usage
RAP Retained Accessory Power Relay
HEADLAMP Headlamp Relay
Circuit
BreakersUsage
RETAINED
ACCSRY
PWR BRKRPower Window, Sunroof Breaker
5-101

Upper Fuse Block
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.
Fuses Usage
LEFT I/P Left Fuse Block
RT I/P #1 Right Fuse Block (Battery)
RT I/P #2 Right Fuse Block (Battery)
Fuses Usage
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
(CMPR)HVAC Compressor Relay &
Generator
BLOWER
MOTORHVAC Blower Motor
Relays Usage
FUEL PUMP Fuel Pump
DRL RELAY Daytime Running Lamps
CRANK RLY Starter (Crank) Relay
HORNS Horn
FOG LTS Fog Lamps
5-104