2000 CADILLAC SEVILLE headlamp

6-34
Bulb Replacement
For any bulb changing procedure not listed in this
section, contact your dealer 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 and remove the upper filler panel
by loosening all the screws and then removing the
grommets. You can later reinstall the upper filler
panel by inserting the grommets, along with the
screws, back into the holes.
2. Remove the two bolts fastening the headlamp to the
headlamp mounting bracket.
3. Pull the headlamp straight forward to disengage the
locator pin at the outboard edge of the headlamp.

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6. Remove the headlamp bulb socket.7. After removing the wiring harness connector from
the headlamp bulb socket, replace the bulb assembly.
Reconnect it to the wiring harness and reinstall
the headlamp bulb assembly back into the
headlamp housing.
8. After reinstalling the bulb and socket, reinstall
the rubber cover. Make sure it fully covers the
headlamp socket.
9. To replace the high
-beam bulb, turn the bulb socket
counterclockwise to unlock the socket from the lamp
housing. Follow the instructions in Step 6 through 8
to install the new bulb.

6-37
Headlamp Aiming
Your vehicle has a visual optical headlamp aiming
system equipped with horizontal aim indicators. The
aim has been pre
-set at the factory and should need
no further adjustment. This is true even though your
horizontal aim indicators may not fall exactly on the
ª0º (zero) marks on their scales.If your vehicle is damaged in an accident, the headlamp
aim may be affected. Aim adjustment to the low beam
may be necessary if it is difficult to see lane markers
(for horizontal aim), or if oncoming drivers flash their
high beams 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.
However, it is possible for you to re
-aim your
headlamps as described in the following procedure.
NOTICE:
To make sure your headlamps are aimed properly,
read all the instructions before beginning. Failure
to follow these instructions could cause damage to
headlamp parts.

6-38
The vehicle should be properly prepared as follows:

The vehicle should be placed so the headlamps are
25 ft. (7.6 m) from a light colored wall or other
flat surface.

The vehicle must have all four tires on a perfectly
level surface which is level all the way to the wall or
other flat surface.

The vehicle should be placed so it is perpendicular to
the wall or other flat surface.

The vehicle should not have any snow, ice or mud
attached to it.

The vehicle should be fully assembled and all other
work stopped while headlamp aiming is being done.

The vehicle should be normally loaded with a full
tank of fuel and one person or 160 lbs. (75 kg) on
the driver's seat.

Tires should be properly inflated.

Start the vehicle and rock it to level the suspension.
Headlamp aiming is done with the vehicle low beam
lamps. The high beam lamps will be correctly aimed if
the low beam lamps are aimed properly.The headlamp aiming devices are under the hood near
the headlamps.
If you believe your headlamps need horizontal
(left/right) adjustment, follow the horizontal aiming
procedure. If you believe your headlamps need only
vertical (up/down) adjustment, follow only the vertical
aiming procedure.
Adjustment screws can be turned with an E8 Torx

socket or T15 Torx screwdriver.

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Headlamp Horizontal Aiming
Turn the horizontal aiming
screw (A) until the indicator
(B) is lined up with zero.
Once the horizontal aim
is adjusted, then adjust
the vertical aim.
Headlamp Vertical Aiming
1. Find the aim dot on the lens of the lamps.
2. Measure the distance from the ground to the aim dot
on each lamp. Record this distance.
3. At the wall or other flat surface, measure from the
floor to the recorded distance and draw a horizontal
line the width of the vehicle.

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4. Turn on the low beam headlamps and cover the lamp
not being evaluated. The ambient light should allow
the beam cut off to be seen on the wall.5. Turn the vertical aiming screw (C) until the
headlamp beam is aimed to the horizontal line.
It is recommended to cover the lamp that is not
being evaluated to better see the beam being aimed.

6-41 Front Turn Signal Lamps
1. The turn signal lamps are located on the outboard side
of the headlamps. To access, remove the headlamp,
(see Steps 1, 2 and 3 under ªHeadlampsº).
2. Press the bulb socket tab and turn the bulb socket
counterclockwise to unlock the socket from the
lamp housing.
3. To remove the bulb, grasp the socket firmly and
pull the bulb out. Install the new bulb and reverse
the steps to replace.
Rear Turn Signal Lamps and Taillamps
1. Open the trunk to gain access to the lamp housing.
2. Remove the rear
compartment sill plate
by removing the upper
convenience net
retainers, located at
each end, as shown.
3. Move the spare tire cover out of the way.
4. Pull the trunk trim away to access the wing nuts.

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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.
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.