CADILLAC DEVILLE 2004 8.G Owners Manual

Headlamp Vertical Aiming
Notice:Horizontal aiming must be performed
before making any adjustments to the vertical aim.
Adjusting the vertical aim rst will result in an
incorrect headlamp aim.
1. Find the aim dot on the lens of the low beam lamps.2. Measure the distance from the ground to the aim
dot on each lamp; if left low beam, subtract two
inches. Record this distance.
3. At the wall or other at surface, measure from the
ground upward the recorded distance from Step 2
and draw or tape a horizontal line the width of
the vehicle.
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4. Turn on the low-beam headlamps and place a
piece of cardboard or equivalent in front of the
headlamp not being aimed. This should allow only
the beam of light from the headlamp being
aimed to be seen on the at surface.
Notice:Do not cover a headlamp to improve beam
cut-off when aiming. Covering a headlamp may
cause excessive heat build-up which may cause
damage to the headlamp.5. Turn the vertical aiming screw (C) until the
headlamp beam is aimed to the horizontal tape line.
The top edge of the cut-off should be positioned
at the bottom edge of the horizontal tape line.
6. Repeat Steps 4 and 5
for the opposite
headlamp.
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Bulb Replacement
For the proper type of replacement bulb, see
Replacement Bulbs on page 5-64.
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.
Headlamps
1. Remove all of the
push-pins that hold the
ller panel cover in
place by pressing in the
center of each pin
and then pulling up on
the outer circle.
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2. Remove the two bolts at the top of the headlamp
assembly.
3. Loosen the bolt at the bottom of the headlamp
assembly.4. Use a tool to help pry the headlamp assembly away
from the vehicle.
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5. Firmly grasp the outboard side of the headlamp
assembly with both hands and pull hard enough
so that the whole assembly separates from
the vehicle.6. Remove the bulb
socket dust cover.
7. Turn the headlamp
housing socket
counterclockwise to
unlock the socket from
the lamp housing.
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8. Pull the old bulb out of
the socket.
9. Install the new bulb into the socket. Make sure that
the bulb is locked in rmly.
10. Reinstall the headlamp housing socket into the
headlamp assembly.
11. Reinstall the headlamp assembly by reversing
Steps 2 through 6.To reinstall the ller panel, do the following:
1. Place the ller panel in the correct location.
2. Reset each push-pin by holding each by the outer
circle while pushing up on the pin assembly from
below. The center portion of the push-pin should
now be above the outer circle.
3. After placing each push-pin into the opening, press
down on the outer circle until it is seated against
the surface of the ller panel.
4. Lock each push-pin in place by pressing the center
of each down until it is level with the outer circle.
Use care not to press down so far that the push-pin
releases again.
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Front Turn Signal, Sidemarker,
Parking and Cornering Lamps
1. The turn signal lamps are located beside the
headlamp bulbs. To access, lift off the bulb
socket dust cover. See Steps 1 through 6 under
Headlamps on page 5-59.
2. Press the tab down and turn the housing socket
clockwise to unlock the socket from the lamp
housing.3. Remove the turn signal lamp housing socket and
replace the bulb.
4. Reverse Steps 1 and 2 to reinstall.
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Center High-Mounted Stoplamp
(CHMSL)
It is recommended that this component be replaced as
a unit. See your dealer.
Taillamps, Turn Signal, and
Stoplamps
It is recommended that this component be replaced as
a unit. See your dealer.
Replacement Bulbs
For any bulb not listed here, contact your dealer.
Lamp Bulb Number
Cornering Lamps 3157
Front Turn Signal 3157
Headlamps, Composite
Lower High Beam
Upper Low Beam9005
9006
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Windshield Wiper Blade
Replacement
Windshield wiper blades should be inspected each time
maintenance is performed. See “Wiper Blade Check”
underScheduled Maintenance on page 6-4.
It is a good idea to clean or replace the wiper blade
assembly on a regular basis or when worn. For proper
windshield wiper blade length and type, seeNormal
Maintenance Replacement Parts on page 6-14.
To replace the wiper blade assembly, do the following:
1. Turn the ignition to ACCESSORY and turn the
wipers on. Position the wipers on the windshield
in the mid-wipe position. Then with a door
open, turn the ignition to OFF.2. Tip the blade up almost to a T position and push
down on the tab to release the wiper blade
assembly.
3. To install, align the wiper blade with the loop on the
wiper blade assembly, and push up to snap it into
place.
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Tires
Your new vehicle comes with high-quality tires made by
a leading tire manufacturer. If you ever have questions
about your tire warranty and where to obtain service,
see your GM Warranty booklet for details. For additional
information refer to the tire manufacturer’s booklet
included with your vehicle’s Owner’s Manual.
{CAUTION:
Poorly maintained and improperly used
tires are dangerous.
Overloading your tires can cause
overheating as a result of too much
friction. You could have an air-out and a
serious accident. SeeLoading Your
Vehicle on page 4-35.
Underinated tires pose the same danger
as overloaded tires. The resulting accident
could cause serious injury. Check all tires
frequently to maintain the recommended
pressure. Tire pressure should be checked
when your tires are cold.
CAUTION: (Continued)
CAUTION: (Continued)

Overinated tires are more likely to be
cut, punctured or broken by a sudden
impact— such as when you hit a pothole.
Keep tires at the recommended pressure.
Worn, old tires can cause accidents. If
your tread is badly worn, or if your tires
have been damaged, replace them.
SeeInflation - Tire Pressure on page 5-74, for
ination pressure adjustment for higher speed
driving.
Tire Sidewall Labeling
Useful information about a tire is molded into its
sidewall. The examples below show a typical passenger
car tire and a compact spare tire sidewall.
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