2003 CADILLAC CTS fuel

6-64
Mini Fuses Usage
ELEC PRNDL Electronic PRNDL
TCC/ET TCC/ET Brake Switch (Extended
Travel), TCC/ET Brake Switch
(Cruise Disable)
STOP LP SW Stop Lamp Switch
IGN SW Ignition Switch (Power to IGN
-3
and CRANK)
VOLT CHECK DIM (Dash Integration Module)
ECM/TCM TCM (Transmission Control
Module), ECM (Electronic
Control Module), IPC (Instrument
Panel Cluster), PASS
-Key III+
Module
WPR MOD Windshield Wiper Module
Assembly
INJ Fuel Injectors
COMP
CLUTCHCompressor Clutch
WPR SW Windshield Wiper/Washer SwitchMini Fuses Usage
FOG LAMP Fog Lamps
OUTLET Center Console Accessory
Power Outlet
POST 02 Driver's and Passenger's Side
Oxygen Sensors, LRPDB
(Pusher Cooling Fan Relay)
I/P OUTLET Instrument Panel Accessory
Power Outlet
CCP Climate Control Panel
PRE 02 Driver's and Passenger's Side
Oxygen Sensors, Transmission
Output Speed Sensor
SPARE Not Used
SPARE Not Used
SPARE Not Used
Circuit
BreakersUsage
HDLP WASH
C/B
- OPTHeadlamp Washer Motor (Option)

6-70
Minifuses Usage
INTERIOR
LAMPHush Panel Lamps, Puddle
Lamps, Overhead Courtesy
Lamp Assembly
PSGR DR MOD Right Front Passenger
Door Module
RIM RIM (Rear Integration Module),
Ignition Switch, Key Lock
Cylinder
REAR
FOG LAMPRear Fog Lamps (Export Only)
SPARE Not Used
NAV TV Tuner Assembly (Export
Only), VICS (Vehicle Information
Communication System) ModuleMinifuses Usage
SPARE Not Used
SPARE Not Used
POWER
SOUNDERPower Sounder, Inclination Sensor
SPARE Not Used
TRUNK LAMP Trunk Lamp
FUEL
PUMP MTRFuel Pump Motor
AFTERBOIL Afterboil Heater Pump
R FRT HTD
SEAT MODPassenger's Side Heated
Seat Module
SPARE Not Used
SIR SDM (Sensing Diagnostic
Module)
RIM ISRVM (Inside Rearview Mirror),
Power Sounder, RIM, Passive
Trunk Release Sensor
CANISTER
VENTCanister Vent Solenoid
SPARE Not Used

6-71
Circuit
BreakersUsage
DR MOD
PWR C/BDoor Modules
J Cases Usage
REAR DEFOG Rear Window Defogger Element
SUNROOF
MODPower Sunroof Module
Relays Usage
RAP
RELAY MINIRetained Accessory Power
SPARE Not Used
REAR DEFOG
RELAY MINIRear Window DefoggerRelays Usage
SPARE Not Used
AFTER
BOIL MICROAfterboil Heater Pump
INT LAMP
RELAY MICROHush Panel Lamps, Puddle
Lamps, Overhead Courtesy
Lamp Assembly
IGN 1 RELAY
MICROIgnition Switch
REAR FOG
LAMP RLY
MICRORear Fog Lamps (Export Only)
FUEL PUMP
MOTOR RLY
MICROFuel Pump Motor

6-72
Replacement Bulbs
For any bulb not listed here contact your dealer.
Application Number
Front and Rear Turn Signal Lamps 3157K. . . . . . . . .
Fog Lamps 9145. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Back
-Up Lamps 3157K. . . . . . . . . . . . . . . . . . . . . . . .
License Plate Lamps W5WLL. . . . . . . . . . . . . . . . . .
Taillamps 3157K. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stop Lamps 3157K. . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Sidemarker Lamps 3157K. . . . . . . . . . . . . . . . . .
Capacities and Specifications
The following approximate capacities are given in
English and metric conversions. Please refer to
ªRecommended Fluids and Lubricantsº Index
for more information.
Engine Specifications
Type 3.2 L V6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VIN Engine Code N. . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel Nut Torque
100 lb-ft (140 N´m)
Capacities
Automatic
Transmission (5L40
-E) 9.0 quarts (8.5 L). . . . . . . .
Manual Transmission (M35) 1.3 quarts (1.3 L). . . . .
Engine Oil with Filter 5.0 quarts (4.8 L). . . . . . . . . .
Engine Cooling System 10.4 quarts (9.8 L). . . . . . . .
Fuel Tank 17.5 U.S. gallons (66.2 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.

7-4
Part A: Scheduled Maintenance
Services
Using Your Maintenance Schedule
We at General Motors want to help you keep your
vehicle in good working condition. But we don't know
exactly how you'll drive it. You may drive very short
distances only a few times a week. Or you may drive
long distances all the time in very hot, dusty weather.
You may use your vehicle in making deliveries.
Or you may drive it to work, to do errands or in
many other ways.
Because of all the different ways people use their
vehicles, maintenance needs vary. You may need more
frequent checks and replacements. So please read the
following and note how you drive. If you have any
questions on how to keep your vehicle in good
condition, see your dealer.This part tells you the maintenance services you should
have done and when you should schedule them. If you
go to your dealer for your service needs, you'll know
that GM
-trained and supported service people will
perform the work using genuine GM parts.
The proper fluids and lubricants to use are listed in
Part D. Make sure whoever services your vehicle
uses these. All parts should be replaced and all
necessary repairs done before you or anyone else
drives the vehicle.
This schedule is for vehicles that:

carry passengers and cargo within recommended
limits. You will find these limits on your vehicle's
Tire
-Loading Information label. See ªLoading Your
Vehicleº in the Index.

are driven on reasonable road surfaces within legal
driving limits.

use the recommended fuel. See ªFuelº in the Index.

Scheduled Maintenance
7-6Engine Oil Scheduled Maintenance
Change engine oil and filter as indicated by the
GM Oil Life System
(or every 12 months,
whichever occurs first). Reset the system.
Your vehicle has a computer system that lets you know
when to change the engine oil and filter. This is based on
engine revolutions and engine temperature, and not on
mileage. Based on driving conditions, the mileage at
which an oil change will be indicated can vary
considerably. For the oil life system to work properly,
you must reset the system every time the oil is changed.When the system has calculated that oil life has been
diminished, it will indicate that an oil change is
necessary. A Change Engine Oil message in the Driver
Information Center (DIC) will come on. Change your oil
as soon as possible within the next two times you stop
for fuel. It is possible that, if you are driving under the
best conditions, the oil life system may not indicate that
an oil change is necessary for over a year. However,
your engine oil and filter must be changed at least once
a year and at this time the system must be reset. It is also
important to check your oil regularly and keep it at the
proper level.
If the system is ever reset accidentally, you must change
your oil at 3,000 miles (5 000 km) since your last oil
change. Remember to reset the oil life system whenever
the oil is changed. See ªOil Life Systemº in the Index
for information on resetting the system.
An Emission Control Service.

Scheduled Maintenance
7-15
100,000 Miles (166 000 km)

Replace spark plugs.
An Emission Control Service.

Replace timing belt (or every 96 months, whichever occurs first).
An Emission Control Service. (See footnote #.)

Replace fuel filter.
An Emission Control Service.

Change automatic transmission fluid and filter if the vehicle is mainly driven
under one or more of these conditions:
± In heavy city traffic where the outside temperature regularly reaches
90
F (32
C) or higher.
± In hilly or mountainous terrain.
± When doing frequent trailer towing.
± Uses such as high performance operation.
If you do not use your vehicle under any of these conditions, the fluid and
filter do not require changing.
150,000 Miles (240 000 km)
Drain, flush and refill cooling system (or every 60 months since last
service, whichever occurs first). See ªEngine Coolantº in the Index for what
to use. Inspect hoses. Clean radiator, condenser, pressure cap and neck.
Pressure test the cooling system and pressure cap.
An Emission Control Service.
ACTUAL
SERVICED BY:MILEAGE
DATE
ACTUAL
SERVICED BY:MILEAGE
DATE

7-16
Part B: Owner Checks and Services
Listed in this part are owner checks and services which
should be performed at the intervals specified to help
ensure the safety, dependability and emission control
performance of your vehicle.
Be sure any necessary repairs are completed at once.
Whenever any fluids or lubricants are added to your
vehicle, make sure they are the proper ones, as shown
in Part D.
At Each Fuel Fill
It is important for you or a service station attendant to
perform these underhood checks at each fuel fill.
Engine Oil Level Check
Check the engine oil level and add the proper oil
if necessary. See ªEngine Oilº in the Index for
further details.Engine Coolant Level Check
Check the engine coolant level and add DEX
-COOL

coolant mixture if necessary. See ªEngine Coolantº in
the Index for further details.
Windshield Washer Fluid Level Check
Check the windshield washer fluid level in the
windshield washer tank and add the proper fluid if
necessary. See ªWindshield Washer Fluidº in the
Index for further details.
At Least Once a Month
Tire Inflation Check
Make sure tires are inflated to the correct pressures.
Don't forget to check your spare tire. See ªTiresº in the
Index for further details.
Cassette Deck Service
Clean cassette deck. Cleaning should be done every
50 hours of tape play. See ªAudio Systemsº in the
Index for further details.