CADILLAC DEVILLE 1999 7.G Owners Manual

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6-31 Brake Wear
Your vehicle has four-wheel disc brakes.
Disc brake pads have built
-in wear indicators that make a
high
-pitched warning sound when the brake pads are worn
and new pads are needed. The sound may come and go or
be heard all the time your vehicle is moving (except when
you are pushing on the brake pedal firmly).
CAUTION:
The brake wear warning sound means that soon
your brakes won't work well. That could lead to
an accident. When you hear the brake wear
warning sound, have your vehicle serviced.
NOTICE:
Continuing to drive with worn-out brake pads
could result in costly brake repair.
Some driving conditions or climates may cause a brake
squeal when the brakes are first applied or lightly
applied. This does not mean something is wrong with
your brakes.
Properly torqued wheel nuts are necessary to help
prevent brake pulsation. When tires are rotated, inspect
brake pads for wear and evenly torque wheel nuts in the
proper sequence to GM specifications.
Brake linings should always be replaced as complete
axle sets.
See ªBrake System Inspectionº in the Maintenance
Schedule booklet under Part C ªPeriodic
Maintenance Inspections.º
Brake Pedal Travel
See your dealer if the brake pedal does not return to
normal height, or if there is a rapid increase in pedal
travel. This could be a sign of brake trouble.
Brake Adjustment
Every time you apply the brakes, with or without the
vehicle moving, your brakes adjust for wear.

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6-32 Replacing Brake System Parts
The braking system on a vehicle is complex. Its many
parts have to be of top quality and work well together if
the vehicle is to have really good braking. Your vehicle
was designed and tested with top
-quality GM brake
parts. When you replace parts of your braking
system
-- for example, when your brake linings wear
down and you have to have new ones put in
-- be sure
you get new approved GM replacement parts. If you
don't, your brakes may no longer work properly. For
example, if someone puts in brake linings that are wrong
for your vehicle, the balance between your front and
rear brakes can change
-- for the worse. The braking
performance you've come to expect can change in many
other ways if someone puts in the wrong replacement
brake parts.
Battery
Your new vehicle comes with an ACDelco Freedom

battery. When it's time for a new battery, we recommend
an ACDelco Freedom battery. Get one that has the
replacement number shown on the original battery's label.
Vehicle Storage
If you're not going to drive your vehicle for 25 days or
more, remove the black, negative (
-) cable from the
battery. This will help keep your battery from
running down.
CAUTION:
Batteries have acid that can burn you and gas
that can explode. You can be badly hurt if you
aren't careful. See ªJump Startingº in the Index
for tips on working around a battery without
getting hurt.
Contact your dealer to learn how to prepare your vehicle
for longer storage periods.
Also, for your audio system, see ªTheft
-Deterrent
Featureº in the Index.

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6-33
Bulb Replacement
For the proper type of replacement bulb, 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. To access the headlamps, lift the cover as shown.

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6-34
2. Turn the headlamp housing socket counterclockwise
to unlock the socket from the lamp housing.3. Disconnect the socket from the harness by separating
the locking clip.
4. Install the new bulb and socket to the wiring harness
connector. Make sure that the harness is locked to the
bulb socket.

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6-35
5. Reinstall the headlamp housing socket back into the
headlamp assembly.Headlamp Aiming
Your vehicle has a headlamp system equipped with
horizontal and vertical aim indicators. The aim has been
pre
-set at the factory and should need no further
adjustment. This is true even though your vertical and
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 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 it 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.

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6-36
The vehicle should be properly prepared as follows:

The vehicle must have all four tires on a perfectly
level surface.

If necessary, pads may be used on an uneven 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.

There should not be any cargo or loading of the
vehicle, except it should have a full tank of fuel and
one person or 160 lbs. (75 kg) on the driver's seat.

Close all doors.

Tires should be properly inflated.

Rock the vehicle to stabilize the suspension.
A. Horizontal Aiming Screw
B. Vertical Aiming Screw
Start with the horizontal aim. The adjustment screws can be
turned with an E8 Torx
 socket or T15 Torx screwdriver.
Once the horizontal aim is adjusted, then adjust the
vertical aim.

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6-37
A. Horizontal Aiming Screw
C. Indicator
1. Turn the horizontal aiming screw until the indicator
is lined up with zero.B. Vertical Aiming Screw
D. Level Bubble
2. Turn the vertical aiming screw until the level bubble
is lined up with zero.

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6-38 Front Turn Signal Lamps
1. The turn signal lamps are located below the
headlamps. To access, lift off the headlamp cover
(see Step 1 under ªHeadlampsº).
2. 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.

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6-39 Center High-Mounted Stoplamp (CHMSL)
1. Lift the trim cover to remove.
2. Twist the socket counterclockwise and remove the
socket and bulb from the housing.
3. Replace the bulb.
Reverse the steps to reassemble the stoplamp assembly.

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6-40 Rear Turn Signal Lamps and Taillamps
1. Loosen the upper Torx
screw, but don't remove it.
2. Gently tilt the top portion of the lamp housing to
access the bulb sockets. If you can't access the lower
bulb socket, remove the lamp housing completely.
3. Press the bulb socket housing lever and turn the
socket counterclockwise to remove it.