2004 CHEVROLET BLAZER headlamp

5. Turn the bulb/socket assembly counterclockwise
to remove it.
6. Put the new bulb/socket assembly into the headlamp
assembly and turn it clockwise until it is tight.
7. Plug in the electrical connector.
8. Put the headlamp assembly back into the vehicle.
9. Install the two retaining clips.
10. Close the hood.
Two-Piece Composite Headlamp System
1. Open the hood.
2. Remove the black retainer clips by lifting up.
3. Unplug the electrical connector.
4. Pull the headlamp assembly out.
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5. Turn the bulb/socket assembly counterclockwise
to remove it.
6. Put the new bulb/socket assembly into the headlamp
assembly and turn it clockwise until it is tight.
7. Plug in the electrical connector.
8. Put the headlamp assembly back into the vehicle.
9. Install the two retaining clips.
10. Close the hood.
One-Piece Front Turn Signal Lamps
1. Remove the headlamp assembly as shown in
“One-Piece Composite Headlamp System”
underHeadlamps on page 5-50.
2. Twist the bulb socket
to remove it from the
headlamp assembly.
3. Pull the bulb straight out to remove it from the socket.
4. Push the new bulb into the socket until it snaps
into place.
5. Put the bulb socket into the lamp assembly and
turn it clockwise until it is tight.
6. Put the headlamp assembly back into the vehicle.
7. Install the two retaining clips.
8. Close the hood.
5-52

Two-Piece Front Turn Signal Lamps
1. Remove the headlamp assembly as shown in
“Two–Piece Composite Headlamp System”
underHeadlamps on page 5-50.
2. Locate the locking
tabs on the assembly.
Squeeze the tabs
together and push that
end of the assembly
out while holding
the tabs. The assembly
will swing out.
3. Unplug the electrical connector.4. Turn the harness bulb socket counterclockwise to
remove it.
5. Pull the bulb straight out to remove it from the socket.
6. Push the new bulb into the socket until it snaps into
place.
7. Reinstall the harness bulb socket with the new bulb
into the headlamp assembly and turn it clockwise
until it is tight.
To reinstall the assembly, snap the outboard end of
the lamp assembly back into the vehicle. Then swing
the assembly in and snap it into place.
8. Install the two retaining clips.
9. Close the hood.
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Taillamps
1. Open the tailgate.
2. Remove the
two screws from
the lamp assembly.
3. Pull the assembly away from the vehicle.
4. Turn the socket counterclockwise to remove it.
Push the tab in while you turn the socket
counterclockwise.
5. Holding the base of the bulb, pull the bulb straight
out of the socket.6. Push the new bulb straight into the socket until
it clicks.
7. Put the socket into the assembly and turn the
socket clockwise until it locks in place.
8. Install the lamp assembly and tighten the screws.
9. Close the tailgate.
Replacement Bulbs
Lamp Number
Halogen Headlamps,
Composite Low Beam9006 HB4
or 9006LL
Halogen Headlamps,
Composite High Beam9005 HB3
Taillamps 3057
Turn Signal Lamps 3457A
*For replacement bulbs not listed here, please consult
your dealer.
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Scheduled wheel alignment and wheel balancing are
not needed. However, if you notice unusual tire wear or
your vehicle pulling one way or the other, the alignment
may need to be reset. If you notice your vehicle
vibrating when driving on a smooth road, your wheels
may need to be rebalanced.
Wheel Replacement
Replace any wheel that is bent, cracked or badly rusted
or corroded. If wheel nuts keep coming loose, the
wheel, wheel bolts and wheel nuts should be replaced.
If the wheel leaks air, replace it (except some
aluminum wheels, which can sometimes be repaired).
See your dealer if any of these conditions exist.
Your dealer will know the kind of wheel you need.
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 5-76for more
information.
5-73

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, seeServicing
Your Air Bag-Equipped Vehicle on page 1-58.
Headlamps
The headlamp wiring is protected by an internal circuit
breaker. An electrical overload will cause the lamps
to go on and off, or in some cases to remain off.
If this happens, have your headlamp wiring 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 or ice, the wiper will stop until the motor cools.
If the overload is caused by some electrical problem,
be sure to get it xed.
Power Windows and Other Power
Options
Circuit breakers protect 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 or goes away.
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Fuse Usage
A Not Used
B Not Used
1 Not Used
2Cigarette Lighter, Data Link
Connector
3Cruise Control Module and Switch,
Body Control Module, Heated SeatsFuse Usage
4Gages, Body Control Module,
Instrument Panel Cluster
5Parking Lamps, Power Window
Switch, Body Control Module,
Ashtray Lamp
6 Steering Wheel Radio Controls
7Headlamps Switch, Body Control
Module, Headlamp Relay
8Courtesy Lamps, Battery Run-Down
Protection
9Heating, Ventilation, Air Cooling
Control Head (Manual)
10 Turn Signal
11 Cluster, Engine Control Module
12 Interior Lights
13 Auxiliary Power
14 Power Locks Motor
154WD Switch, Engine Controls
(VCM, PCM, Transmission)
16 Supplemental Inatable Restraint
17 Front Wiper
5-100

Fuse Usage
TRL TRN Trailer Left Turn
TRR TRN Trailer Right Turn
TRL B/U Trailer Back Up Lamps
VEH B/U Vehicle Back Up Lamps
HDLP PWR Headlamp Power
RT TURN Right Turn Signal Front
LT TURN Left Turn Signal Front
HDLP W/W Not UsedFuse Usage
LT TRN Left Turn Signal Rear
RT TRN Right Turn Signal Rear
RR PRK Right Rear Parking Lamps
TRL PRK Trailer Park Lamps
LTHDLP Left Headlamp
RTHDLP Right Headlamp
FRPRK Front Parking Lamps
INT BAT Instrument Panel Fuse Block Feed
ENG IEngine Sensors/Solenoids, MAF,
CAM, PURGE, VENT
ECM BEngine Control Module, Fuel Pump
Module, Oil Pressure
ABS Anti-Lock Brake System
ECM I Engine Control Module Injectors
F/PUMP Fuel Pump
DRL Daytime Running Lamps
A/C Air Conditioning
HORN Horn
W/W PMP Not Used
HORN Horn
BTSIAutomatic Transmission Shift Lock
Control System
B/U LP Back Up Lamps
5-102