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6-31
Bulb Replacement
For the type of bulbs, see ªReplacement Bulbsº in
the Index.
For any bulb changing procedure not listed in this
section, contact your dealer's service department.
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.
Headlamps
1. Open the hood.
2. Remove the front turn signal/parking lamp assembly.
See ªFront Turn Signal/Parking Lampsº later in
this section.
3. Remove the two wing nuts located on top of the
headlamp assembly.
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6-33
8. Carefully put the bulb assembly back into the lamp
housing and tighten the black retainer ring in place.
Be careful not to damage the bulb on the headlamp
aiming bar.9. Align the pins on the bottom of the headlamp
assembly with the holes in the lamp support bracket
while placing the holes in the assembly over the
bolts where the wing nuts attach.
10. Reinstall and tighten the wing nuts.
11. Reinstall the parking/turn signal lamp assembly by
lining up the tabs at the back of the assembly with
the holes in the fender.
12. Tighten the bolt connecting the parking/turn signal
lamp assembly. Be sure the tab from the
parking/turn signal lamp assembly is inboard of the
tab from the headlamp assembly.
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6-34 Front Turn Signal/Parking Lamps
1. Open the hood.
2. Remove the thumb screw attaching the parking/turn
signal lamp assembly to the headlamp assembly.
3. Pull the parking/turn signal lamp assembly away
from the vehicle.
4. Unscrew the bulb socket from the lamp assembly by
pressing the tab while turning it counterclockwise.
5. Replace the bulb by pulling the old one out and
gently pushing the new one into the lamp socket.
6. Line up the tabs on the sockets with the gaps in the
socket holes and screw the bulb socket back into the
lamp housing until a click is heard (the tab popping
back out).
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6-35
7. To reinstall the lamp assembly, line up and insert the tabs
on the back of the assembly with the slots in the fender.
Engage the lower clip on the front of the lamp assembly,
keeping the upper tab on the parking/turn signal lamp
assembly inboard of the headlamp bracket tab.
8. To align the parking/turn signal lamp assembly with
the headlamp assembly, lift up the parking/turn
signal lamp assembly until the upper edge is
contacting the fender.
9. Fasten the parking/turn signal lamp assembly to the
headlamp assembly with the thumb screw removed
in Step 2.
Front Sidemarker
1. Open the hood.
2. Remove the thumb screw attaching the parking/turn
signal lamp assembly to the headlamp assembly.
3. Pull the parking/turn signal lamp assembly away
from the vehicle.
4. Unscrew the bulb socket from the lamp assembly by
turning it counterclockwise.
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6-36
5. Replace the bulb by pulling the old one out and
gently pushing the new one into the lamp socket.
6. Line up the tabs on the sockets with the gaps in the
socket holes and screw the bulb socket back into the
lamp housing.7. To reinstall the lamp assembly, line up and insert the tabs
on the back of the assembly with the slots in the fender.
Engage the lower clip on the front of the lamp assembly,
keeping the upper tab on the parking/turn signal lamp
assembly inboard of the headlamp bracket tab.
8. To align the parking/turn signal lamp assembly with
the headlamp assembly, lift up the parking/turn
signal lamp assembly until the upper edge is
contacting the fender.
9. Fasten the parking/turn signal lamp assembly to the
headlamp assembly with the thumb screw removed
in Step 2.
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6-47
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.
See ªChanging a Flat Tireº in the Index for
more information.
Used Replacement Wheels
CAUTION:
Putting a used wheel on your vehicle is
dangerous. You can't know how it's been used or
how far it's been driven. It could fail suddenly
and cause an accident. If you have to replace a
wheel, use a new GM original equipment wheel.
Tire Chains
NOTICE:
Use tire chains only where legal and only when
you must. Use only SAE Class ªSº type chains
that are the proper size for your tires. Install
them on the front tires and tighten them as
tightly as possible with the ends securely
fastened. Drive slowly and follow the chain
manufacturer's instructions. If you can hear the
chains contacting your vehicle, stop and retighten
them. If the contact continues, slow down until it
stops. Driving too fast or spinning the wheels
with chains on will damage your vehicle.
Page 382 of 429

6-58 Headlamp Wiring
The headlamp wiring is protected by an internal circuit
breaker in the instrument panel fuse panel. 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 Wipers
The windshield wiper motor is protected by an internal
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, be sure to get it fixed.
Power Windows and Other Power Options
Circuit breakers in the instrument panel fuse panel
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 fixed.
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.
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 or use one of the spare fuses in the underhood
fuse and relay center. Just pick some feature of your
vehicle that you can get along without
-- like the radio
or cigarette lighter
-- and use its fuse, if it is the right
amperage. Replace it as soon as you can.
There are two fuse blocks in your vehicle: the
instrument panel fuse block and the underhood fuse
and relay center.
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6-59
Instrument Panel Fuse Block
The instrument panel fuse
block is located to the right
of the glove box.
Pull the door open to access the instrument
panel fuse block.
Circuit
BreakersUsage
HEADLAMP DRL Control Module, Headlamp and
Instrument Panel Dimmer Switch
PWR WDO Front Power Windows
PWR HEATED
SEAT/PSD6
-Way Power Seat(s) and Rear Side
Door Actuator Motor
FRT HVAC/
HI BLWRBlower Motor Hi Speed
Relay Module