2003 CADILLAC DEVILLE service

Seats and Restraint Systems........................... 1-1
Front Seats
............................................... 1-2
Rear Seats
............................................... 1-8
Safety Belts
.............................................. 1-9
Child Restraints
.......................................1-29
Air Bag Systems
......................................1-49
Restraint System Check
............................1-60
Features and Controls..................................... 2-1
Keys
........................................................ 2-3
Doors and Locks
....................................... 2-8
Windows
.................................................2-15
Theft-Deterrent Systems
............................2-19
Starting and Operating Your Vehicle
...........2-23
Mirrors
....................................................2-40
OnStar
žSystem
......................................2-45
HomeLinkžTransmitter
.............................2-47
Storage Areas
.........................................2-51
Sunroof
..................................................2-54
Vehicle Personalization
.............................2-55
Instrument Panel............................................. 3-1
Instrument Panel Overview
.......................... 3-4
Climate Controls
......................................3-29
Warning Lights, Gages and Indicators
.........3-40
Driver Information Center (DIC)
..................3-57
Trip Computer
.........................................3-79Audio System(s)
.......................................3-80
Driving Your Vehicle....................................... 4-1
Your Driving, the Road, and Your Vehicle
..... 4-2
Towing
...................................................4-31
Service and Appearance Care.......................... 5-1
Service
..................................................... 5-3
Fuel
......................................................... 5-4
Checking Things Under
the Hood
.............................................5-10
Headlamp Aiming
.....................................5-49
Bulb Replacement
....................................5-53
Windshield Wiper Blade Replacement
.........5-59
Tires
......................................................5-60
Appearance Care
.....................................5-84
Vehicle Identi®cation
.................................5-92
Electrical System
......................................5-93
Capacities and Speci®cations
...................5-101
Normal Maintenance Replacement Parts
....5-103
Maintenance Schedule..................................... 6-1
Maintenance Schedule
................................ 6-2
Customer Assistance Information.................... 7-1
Customer Assistance Information
.................. 7-2
Reporting Safety Defects
...........................7-10
Index................................................................ 1
2003 Cadillac DeVille Owner ManualM

Your vehicle has a feature that will automatically unlock
the doors and turn the interior lamps on when the air
bags in¯ate (if battery power is available). You can lock
the doors again and turn the interior lamps off by
using the door lock and interior lamp controls.
In many crashes severe enough to in¯ate 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 in¯ate only once. After an
air bag in¯ates, 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 system records information
about the readiness of the system, when the system
commands air bag in¯ation and driver's safetybelt usage at deployment or near-deployment
crash. The module also records speed, engine rpm,
brake and throttle data.
·Let only quali®ed 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.
1-58

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
Service Publications Ordering Information on
page 7-11.
{CAUTION:
For up to 10 seconds after the ignition key is
turned off and the battery is disconnected, an
air bag can still in¯ate during improper
service. You can be injured if you are close to
an air bag when it in¯ates. 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 quali®ed to do so.
The air bag systems do not need regular maintenance.
1-59

There is a master key that works all of the lock cylinders
(driver's door, trunk, ignition and glove box).
There is also a VALET key which only operates the
driver's door and the ignition.
Your vehicle has the PASS-Key
žIII vehicle theft
system. Both the master and VALET key have a
transponder in the key head that matches a decoder in
the vehicle's steering column. If a replacement key
or any additional key is needed, you must purchase this
key from your dealer. The key will have PK3 stamped
on it. Keep the bar code tag that came with the original
keys. Give this tag to your dealer if you need a new
key made.Any new PASS-Key
žIII key must be programmed
before it will start your vehicle. SeePASS-KeyžIII on
page 2-21for more information on programming
your new key.
Notice:Your vehicle has a number of features that
can help prevent theft. You can have a lot of trouble
getting into your vehicle if you ever lock your keys
inside. You may even have to damage your vehicle to
get in. So be sure you have spare keys.
In an emergency, contact Cadillac Roadside Assistance.
See
Roadside Service on page 7-6.
If your vehicle is equipped with the OnStar
žsystem with
an active subscription and you lock your keys inside
the vehicle, OnStar
žmay be able to send a command to
unlock your vehicle. SeeOnStaržSystem on page 2-45for more information.
Remote Keyless Entry System
Your keyless entry system operates on a radio
frequency subject to Federal Communications
Commission (FCC) Rules and with Industry Canada.
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
1. This device may not cause interference, and
2. This device must accept any interference received,
including interference that may cause undesired
operation of the device. Master Key
Valet Key
2-4

This device complies with RSS-210 of Industry Canada.
Operation is subject to the following two conditions:
1. This device may not cause interference, and
2. This device must accept any interference received,
including interference that may cause undesired
operation of the device.
Changes or modi®cations to this system by other than
an authorized service facility could void authorization to
use this equipment.
At times you may notice a decrease in range. This is
normal for any remote keyless entry system. If the
transmitter does not work or if you have to stand closer
to your vehicle for the transmitter to work, try this:
·Check the distance. You may be too far from your
vehicle. You may need to stand closer during
rainy or snowy weather.
·Check the location. Other vehicles or objects may
be blocking the signal. Take a few steps to the
left or right, hold the transmitter higher, and
try again.
·Check to determine if battery replacement is
necessary. See ªBattery Replacementº under
Remote Keyless Entry System Operation on
page 2-5.
·If you are still having trouble, see your dealer or a
quali®ed technician for service.
Remote Keyless Entry System
Operation
With this system you can lock and unlock your doors or
unlock your trunk from about 3 feet (1 m) up to 30 feet
(9 m) away using the remote keyless entry transmitter
supplied with your vehicle.
Q(Lock):Press this
symbol to lock the doors.
The parking lamps will ¯ash
once and the horn will
sound. This arms the
theft-deterrent system.
The parking lamps will not ¯ash, however, if the manual
parking lamps are left on. Remote con®rmation is not
operational if a door is open.
You can program your vehicle so the parking lamps will
not ¯ash and the horn will not sound. For more
information, see
DIC Vehicle Personalization on
page 3-67.
2-5

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 modi®cations 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 ¯ash.
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
Fuses and Circuit Breakers on
page 5-94. 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.
Valet Lockout Switch
The valet lockout switch
is located inside the
glove box.
Press the switch to ON to disable the use of the trunk,
fuel door, garage door opener and optional cellular
telephone. The remote keyless entry transmitter cannot
open the trunk if the valet lockout switch is in ON.
Press this switch to OFF to enable the use of the trunk,
fuel door, garage door opener and optional cellular
telephone.
Locking the glove box with your key will also help to
secure your vehicle.
2-20

PASS-KeyžIII
Your PASS-KeyžIII system operates on a radio
frequency subject to Federal Communications
Commission (FCC) Rules and with Industry Canada.
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions: (1)
this device may not cause harmful interference, and
(2) this device must accept any interference received,
including interference that may cause undesired
operation.
This device complies with RSS-210 of Industry Canada.
Operation is subject to the following two conditions:
(1) this device may not cause interference, and (2) this
device must accept any interference received,
including interference that may cause undesired
operation of the device.
Changes or modi®cations to this system by other than
an authorized service facility could void authorization to
use this equipment.
PASS-Key
žIII uses a radio frequency transponder in
the key that matches a decoder in your vehicle.
PASS-KeyžIII Operation
Your vehicle is equipped with the PASS-KeyžIII
(Personalized Automotive Security System)
theft-deterrent system. PASS-Key
žIII is a passive
theft-deterrent system. This means you don't have to do
anything different to arm or disarm the system. It works
when you insert or remove your key from the ignition.
When the PASS-Key
žIII system senses that someone
is using the wrong key, it shuts down the vehicle's
starter and fuel systems. The starter will not work and
fuel will stop being delivered to the engine. Anyone
using a trial-and-error method to start the vehicle will be
discouraged because of the high number of electrical
key codes.
When trying to start the
vehicle, if the engine does
not start and the
SECURITY light comes on,
the key may have a
damaged transponder.
Turn the ignition off and
try again.
2-21

If the engine does not start, and the key appears to be
undamaged, try another ignition key. At this time,
you may also want to check the fuse. See
Fuses and
Circuit Breakers on page 5-94. If the engine still
does not start with the other key, your vehicle needs
service. If your vehicle does start, the ®rst key may be
faulty. See your dealer who can service the PASS-Key
ž
III to have a new key made.
It is possible for the PASS-Key
žIII decoder to learn the
transponder value of a new or replacement key. Up to 10
additional keys may be programmed for the vehicle. This
procedure is for learning additional keys only.
Canadian Owners:If you lose or damage your keys,
only a GM dealer can service PASS-Key
žIII to
have new keys made. To program additional keys you
will require two current driver's keys (black in color). You
must add a step to the following procedure. After
Step 2, repeat Steps 1 and 2 with the second current
driver's key. Then continue with Step 3.
To program the new key do the following:
1. Verify that the new key has PK3 stamped on it.
2. Insert the current driver's key in the ignition
and start the engine. If the engine will not start see
your dealer for service.
3. After the engine has started, turn the key to OFF,
and remove the key.4. Insert the key to be programmed and turn it to ON
within 10 seconds of removing the previous key.
5. The SECURITY light will turn off once the key has
been programmed. It may not be apparent that the
SECURITY light went on due to how quickly the
key is programmed.
6. Repeat the Steps 1 through 4 if additional keys are
to be programmed.
If you are ever driving and the SECURITY light comes
on and stays on, you will be able to restart your
engine if you turn it off. Your PASS- Key
žIII system,
however, is not working properly and must be serviced
by your dealer. Your vehicle is not protected by the
PASS-Key
žIII system at this time.
If you lose or damage a PASS-Key
žIII key, your dealer
to have a new key made.
In an emergency, contact Cadillac Roadside Assistance.
See
Roadside Service on page 7-6.
2-22