Service manual CADILLAC DEVILLE 2002 8.G Owners Manual

1-33
In many crashes severe enough to inflate an air bag,
windshields are broken by vehicle deformation.
Additional windshield breakage may also occur from the
right front passenger air bag.

Air bags are designed to inflate only once. After an
air bag inflates, you'll need some new parts for your
air bag system. If you don't get them, the air bag
system won't be there to help protect you in another
crash. A new system will include air bag modules
and possibly other parts. The service manual for your
vehicle covers the need to replace other parts.

Your vehicle is equipped with an electronic frontal
sensor, which helps the sensing system distinguish
between a moderate frontal impact and a more
severe frontal impact. Your vehicle is also equipped
with a crash sensing and diagnostic module, which
records information about the frontal air bag system.The module records information about the readiness
of the system, when the system commands air bag
inflation and driver's safety belt usage at deployment
or in a near
-deployment crash. The module also
records speed, engine rpm, brake and throttle data.

Let only qualified technicians work on your air
bag systems. Improper service can mean that an
air bag system won't work properly. See your dealer
for service.
NOTICE:
If you damage the covering for the driver's or the
right front passenger's air bag, or the air bag
covering on the driver's, right front passenger's
or rear seatback, the bag may not work properly.
You may have to replace the air bag module in
the steering wheel, both the air bag module and
the instrument panel for the right front
passenger's air bag, or both the air bag module
and seatback for the side impact air bag. Do not
open or break the air bag coverings.

1-34 Servicing Your Air Bag-Equipped Vehicle
Air bags affect how your vehicle should be serviced.
There are parts of the air bag systems in several places
around your vehicle. Your dealer and the service manual
have information about servicing your vehicle and the
air bag systems. To purchase a service manual, see
ªService and Owner Publicationsº in the Index.
CAUTION:
For up to 10 seconds after the ignition key is
turned off and the battery is disconnected, an air
bag can still inflate during improper service. You
can be injured if you are close to an air bag when
it inflates. Avoid yellow connectors. They are
probably part of the air bag systems. Be sure to
follow proper service procedures, and make sure
the person performing work for you is qualified
to do so.
The air bag systems do not need regular maintenance.
Safety Belt Pretensioners
Your vehicle has safety belt pretensioners. You'll find
them on the buckle end of the safety belts for the
driver and right front passenger. They help the safety
belts reduce a person's forward movement in a
moderate to severe crash in which the front of the
vehicle hits something.
Pretensioners work only once. If they activate in a crash,
you'll need to get new ones, and probably other new
parts for your safety belt system. See ªReplacing
Restraint System Parts After a Crashº in the Index.
Center Front Passenger Position

2-19
Remember, the theft-deterrent system won't arm if you
lock the doors with a key or use the manual door lock. It
activates only if you use a power door lock with the
door open or the remote keyless entry transmitter.
To avoid activating the alarm by accident do
the following:

The vehicle should be locked with the door key or
the manual door lock after the doors are closed if
you don't want to arm the theft
-deterrent system.

Always unlock a door with a key or use the remote
keyless entry transmitter system. Pressing the unlock
button on the remote keyless entry transmitter
disables the theft
-deterrent system. Unlocking a door
any other way will activate the alarm when a door or
the trunk is opened.
If you activate the alarm by accident, unlock the driver's
door with your key. You can also turn off the alarm
by using the unlock button on the remote keyless
entry transmitter system, or by starting the car with a
valid key.
Changes or modifications made to this system by other
than an authorized service facility could void
authorization to use the theft system.
Testing the Alarm
1. From inside the vehicle, roll down the window, then
get out of the vehicle, keeping the door open.
2. From outside of the vehicle, with the door open,
lock the vehicle using the power door lock or the
remote keyless entry system and close the door.
Wait 30 seconds until the SECURITY lamp goes off.
3. Reach in and unlock the door using the manual lock
and open the door. The horn will sound and the
hazard lights will flash.
You can turn off the alarm by unlocking the driver's
door with your key, using the unlock button on the
remote keyless entry transmitter or by starting the car
with a valid key.
If the alarm does not sound when it should, check to see
if the horn works. The horn fuse may be blown. To
replace the fuse, see ªFuses and Circuit Breakersº in the
Index. If the fuse does not need to be replaced, you may
need to have your vehicle serviced.
To reduce the possibility of theft, always arm the
theft
-deterrent system when leaving your vehicle.

2-34
Parking Brake
The parking brake pedal is
located to the left of the
regular brake pedal, near
the driver's door.
To set the parking brake, hold the regular brake pedal
down with your right foot and push the parking brake
pedal down with your left foot.
If the ignition is on, the BRAKE indicator light on the
instrument panel cluster should come on. If it doesn't,
you need to have your vehicle serviced.When you move out of PARK (P) or NEUTRAL (N)
and the engine is running, the parking brake should
release. If the parking brake has not been fully released
and you try to drive off with the parking brake on, the
BRAKE indicator light will come on and stay on and a
multiple chime will sound.
If the parking brake doesn't fully release, you can
manually release the pedal. However, be sure to read the
following paragraphs:
CAUTION:
Always shift to PARK (P) before pulling the
manual release lever. If your hand or arm is in
the way of the pedal you could be hurt. The pedal
springs back quickly. Keep your hand and arm
away when you use the manual release lever.
Before releasing the manual parking brake, be sure to put
the vehicle in PARK (P) and turn the ignition to OFF.

2-35
Reach under the driver's side of the instrument panel
and pull down on the manual release lever, which is
located behind the parking brake pedal. Pull down on
the yellow tab as shown by the arrow in the illustration.
If the parking brake does not release, you should have
your vehicle towed to your dealer for service.
NOTICE:
Driving with the parking brake on can cause
your rear brakes to overheat. You may have to
replace them and you could also damage other
parts of your vehicle.
If you are towing a trailer and are parking on a hill, see
ªTowing a Trailerº in the Index.

3-18
AVC (Automatic Volume Control): With AVC, your
audio system monitors the noise in the vehicle. Then,
AVC adjusts the volume level so that it always sounds
the same to you. To use AVC, press and hold the TONE
button until AUTO VOLUME CONTROL OFF appears
on the display. Then press the LEVEL plus symbol.
AUTO VOLUME CONTROL ON will appear on the
display. AVC VOLUME will appear on the display any
time you adjust the volume while AVC is on. To turn
AVC off, press and hold the TONE button until AUTO
VOLUME CONTROL ON appears on the display. Then
press the LEVEL minus symbol. AUTO VOLUME
CONTROL OFF will appear on the display.
HR (Hour) or MN (Minute): Display the time with the
ignition off by pressing one of these buttons.
SOURCE: Press this button to select a source, either
cassette or compact disc. The audio source must be
loaded to play. Available loaded sources are shown on
the display. If a source is being used, it will be
underlined on the display. If none of the audio sources
are loaded, NO SOURCE LOADED will appear on the
display. Press this button again or press BAND to switch
back to the radio.Finding a Station
BAND: Press this button to select AM, FM1 or FM2,
weather or XM1 or XM2 if your radio is equipped with
XM
Satellite Radio Service.
~' TUNE SEEK !': When this button is pressed it
has two positions. Press this button to the first position
to manually tune to the next or previous stations. If this
button is held at the first position for a few seconds, the
radio will continue tuning until this button is released.
Press this button to the second position and release it to
seek to the next or previous radio station.
SCAN: Press this button for less than two seconds to
scan radio stations. The radio will go to a station, play
for five seconds, then go on to the next station. Press
this button again to stop scanning.
To scan preset stations, press and hold SCAN for more
than two seconds until you hear a beep. The radio will
go to the first preset station stored on your pushbuttons,
play for five seconds, then go on to the next preset
station. Press SCAN again to stop scanning. The radio
will scan preset stations with a strong signal only.

4-41 When You Are Ready to Leave After
Parking on a Hill
1. Apply your regular brakes and hold the pedal down
while you:

start your engine,

shift into a gear, and

make sure the parking brake has released.
2. Let up on the brake pedal.
3. Drive slowly until the trailer is clear of the chocks.
4. Stop and have someone pick up and store the chocks.
Maintenance When Trailer Towing
Your vehicle will need service more often when you're
pulling a trailer. See the Maintenance Schedule for more
on this. Things that are especially important in trailer
operation are automatic transaxle fluid (don't overfill),
engine oil, drive belt, cooling system and brake system.
Each of these is covered in this manual, and the Index
will help you find them quickly. If you're trailering, it's
a good idea to review this information before you start
your trip.
Check periodically to see that all hitch nuts and bolts
are tight.
Engine Cooling When Trailer Towing
Your cooling system may temporarily overheat during
severe operating conditions. See ªEngine Overheatingº
in the Index.

6-2
Service
Your dealer knows your vehicle best and wants you to
be happy with it. We hope you'll go to your dealer for
all your service needs. You'll get genuine GM parts and
GM
-trained and supported service people.
We hope you'll want to keep your GM vehicle all GM.
Genuine GM parts have one of these marks:
Doing Your Own Service Work
If you want to do some of your own service work, you'll
want to use the proper service manual. It tells you much
more about how to service your vehicle than this manual
can. To order the proper service manual, see ªService
and Owner Publicationsº in the Index.
Your vehicle has an air bag system. Before attempting to
do your own service work, see ªServicing Your Air
Bag
-Equipped Vehicleº in the Index.
You should keep a record with all parts receipts and list
the mileage and the date of any service work you
perform. See ªMaintenance Recordº in the Index.

6-33 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 tighten wheel nuts in the
proper sequence to GM torque specifications.
Brake linings should always be replaced as complete
axle sets.
See ªBrake System Inspectionº in Section 7
of this manual 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.

6-78 Engine Specifications
Displacement 279 cubic inches (4 565 cc). . . . . . . . .
Type 4.6 L DOHC V8. . . . . . . . . . . . . . . . . . . . . . . . .
VIN Engine Code
DeVille and DHS Y. . . . . . . . . . . . . . . . . . . . . . . . .
DTS 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Torque
DeVille and DHS 300 (lb
-ft) @ 4000 rpm . . . . . . .
407 (N´m) @ 4000 rpm
DTS 295 (lb
-ft) @ 4400 rpm . . . . . . . . . . . . . . . . . .
400 (N´m) @ 4400 rpm
Firing Order 1
-2-7-3-4-5-6-8 . . . . . . . . . . . . . . . . .
Wheel Nut Torque
100 lb-ft (140 N´m)
Capacities
Transaxle (4T80-E) 15.0 quarts (14.2 L). . . . . . . . . .
Engine Oil with Filter 7.5 quarts (7.1 L). . . . . . . . . .
Engine Cooling System 12.5 quarts (11.8 L). . . . . . . .
Fuel Tank 18.5 U.S. gallons (70.1 L). . . . . . . . . . . . .
All capacities are approximate. When adding, be sure to
fill to the approximate level, as recommended in this
manual. Recheck fluid level after filling.
Air Conditioning
Refrigerant Capacity
If you do your own service work, you'll need the proper
service manual. See ªDoing Your Own Service Workº in
the Index for additional information. It is recommended
that service work on your air conditioning system be
performed by a qualified technician.
Air Conditioning
Refrigerant R
-134a 2.2 lbs. (1.0 kg). . . . . . . . . . . . .
Use Refrigerant Oil, R134a Systems
Normal Maintenance
Replacement Parts
Engine Air Cleaner/Filter Element A1208C*. . . . . . .
Passenger Compartment Air Filter Element **. . . . .
Engine Oil Filter PF
-58* . . . . . . . . . . . . . . . . . . . . . .
Spark Plugs PT16EPR
-C13* . . . . . . . . . . . . . . . . . . .
(GM Part 12561466)
Gap: 0.050 inches (1.3 mm)
Windshield Wiper Blade
(Shepherd's Hook Type) 22 inches (56.5 cm). . . . . .
*AC Delco

part number.
**Use an AC Delco

part number.