2003 CADILLAC CTS bulb

2-46
Turn Signal/Multifunction Lever
The lever on the left side of the steering column
includes the following:

Turn and Lane
-Change Signals

Headlamps

Headlamp High/Low Beam
-Changer

Flash
-To-Pass Feature

Fog Lamps
For more information on the exterior lamps, see
ªExterior Lampsº later in this section.
Turn and Lane-Change Signals
To signal a turn, move the lever all the way up or down.
The lever returns automatically when the turn is
complete.
Arrows on the instrument
panel cluster flash in the
direction of the turn or
lane change.
Raise or lower the lever until the arrow starts to flash to
signal a lane change. Hold it there until the lane change
is complete. The lever returns to its original position
when it's released.
Arrows that flash rapidly when signaling for a turn or
lane change may be caused by a burned
-out signal bulb.
Other driver's won't see the signal.
Replace burned
-out bulbs to help avoid possible
accidents. Check the fuse and for burned
-out bulbs if the
arrow fails to work when signaling a turn. See ªFuses
and Circuit Breakersº in the Index for more information.

2-91
Engine Coolant Temperature
Warning Light
This light tells you that your
engine has overheated.
This light will come on when you first start the vehicle
as a check to let you know that the light is working. It
will go out after a few seconds. If the light does not
come on, the bulb may be burned out. See your dealer
for assistance in changing the bulb.
If the light does not go out or if the light comes on and
stays on while you are driving, your vehicle may have a
problem with the cooling system. You should stop the
vehicle and turn off the engine as soon as possible to
avoid damage to the engine. A warning chime will
sound when this light is on, also.
See ªEngine Overheatingº in the Index.
Malfunction Indicator Lamp
(Check Engine Light)
Your vehicle is equipped
with a computer which
monitors operation of the
fuel, ignition and emission
control systems.
This system is called OBD II (On
-Board
Diagnostics
-Second Generation) and is intended to
assure that emissions are at acceptable levels for the life
of the vehicle, helping to produce a cleaner
environment. The CHECK ENGINE light comes on to
indicate that there is a problem and service is required.
Malfunctions often will be indicated by the system
before any problem is apparent. This may prevent more
serious damage to your vehicle. This system is also
designed to assist your service technician in correctly
diagnosing any malfunction.

4-39 Making Turns
NOTICE:
Making very sharp turns while trailering could
cause the trailer to come in contact with the
vehicle. Your vehicle could be damaged. Avoid
making very sharp turns while trailering.
When you're turning with a trailer, make wider
turns than normal. Do this so your trailer won't
strike soft shoulders, curbs, road signs, trees or other
objects. Avoid jerky or sudden maneuvers. Signal well
in advance.
Turn Signals When Towing a Trailer
When you tow a trailer, your vehicle may need a
different turn signal flasher and/or extra wiring. Check
with your dealer. The arrows on your instrument panel
will flash whenever you signal a turn or lane change.
Properly hooked up, the trailer lamps will also flash,
telling other drivers you're about to turn, change lanes
or stop.
When towing a trailer, the arrows on your instrument
panel will flash for turns even if the bulbs on the trailer
are burned out. Thus, you may think drivers behind you
are seeing your signal when they are not. It's important
to check occasionally to be sure the trailer bulbs are
still working.
Driving On Grades
Reduce speed and shift to a lower gear before you start
down a long or steep downgrade. If you don't shift
down, you might have to use your brakes so much that
they would get hot and no longer work well.
On a long uphill grade, shift down and reduce your
speed to around 45 mph (70 km/h) to reduce the
possibility of the engine and the transmission
overheating.

6-
6-1
Section 6 Service and Appearance Care
Here you will find information about the care of your vehicle. This section begins with service and fuel information,
and then it shows how to check important fluid and lubricant levels. There is also technical information about your
vehicle, and a part devoted to its appearance care.
6
-2 Service
6
-3 Fuel
6
-5 Fuels in Foreign Countries
6
-6 Filling Your Tank
6
-8 Filling a Portable Fuel Container
6
-8 Checking Things Under the Hood
6
-11 Engine Oil
6
-17 Engine Air Cleaner/Filter
6
-19 Passenger Compartment Air Filter
6
-20 Automatic Transmission Fluid
6
-21 Manual Transmission Fluid
6
-23 Hydraulic Clutch
6
-24 Rear Axle
6
-25 Engine Coolant
6
-28 Surge Tank Pressure Cap
6
-29 Power Steering Fluid
6
-30 Windshield Washer Fluid6
-31 Brakes
6
-34 Battery
6
-35 Bulb Replacement
6
-39 Windshield Wiper Blade Replacement
6
-41 Tires
6
-49 Appearance Care
6
-50 Cleaning the Inside of Your Vehicle
6
-53 Cleaning the Outside of Your Vehicle
6
-57 GM Vehicle Care/Appearance Materials
6
-58 Vehicle Identification Number (VIN)
6
-58 Service Parts Identification Label
6
-59 Electrical System
6
-65 Removing the Rear Seat Cushion
6
-72 Replacement Bulbs
6
-72 Capacities and Specifications
6
-73 Normal Maintenance Replacement Parts

6-35
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.
High Intensity Discharge (HID) Lighting
(If Equipped)
CAUTION:
The low beam high intensity discharge lighting
system operates at a very high voltage. If you try
to service any of the system components, you
could be seriously injured. Have your dealer or a
qualified technician service them.
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
It is recommended that this component be replaced as a
unit. See your dealer.

6-36 Front Turn Signal and Fog Lamps
A. Turn Signal Lamp
B. Fog Lamp
To replace the front turn signal or fog lamps, use the
following procedure:
1. Remove the protection shield located on the
underside of the front of the vehicle by pulling out
the push
-pins located on the underside of the
protection shield.2. Reach up behind the front bumper area from under
the vehicle to access the lamp housing.
3. Remove the bulb socket from the housing by turning
the bulb socket one
-quarter turn counterclockwise.
4. Remove the electrical connector from the bulb by
lifting the two plastic clips.
5. Pull the old bulb from the bulb socket keeping the
bulb straight as you pull it out.
6. Install a new bulb.
7. Reverse the steps to reinstall the lamp assembly.
Center High-Mounted Stop
Lamp (CHMSL)
It is recommended that this component be replaced as a
unit. See your dealer.

6-37 Rear Tail/Stop/Turn Signal and
Side-Marker Lamps
A. Tail and Stop Lamps
B. Turn Signal Lamp
C. Side
-Marker Lamp
To replace the tail, stop, turn signal or side
-marker
lamps use the following procedure:
1. Open the trunk using the trunk button on the remote
keyless entry transmitter or the trunk release button
located on the lower part of the driver's door.2. Remove the compact spare tire cover by turning the
wing nut counterclockwise.
3. Remove the four convenience net wing nuts.
4. Pull the carpet back away from the body of the
vehicle on the side with the burned out bulb.
5. Remove the two mounting screws from the
lamp assembly.
6. Pull out the lamp assembly to expose the
bulb sockets.
7. Turn the bulb socket one
-quarter turn
counterclockwise and pull the bulb and socket out
of the lamp reflector.
8. Pull the old bulb from the bulb socket keeping the
bulb straight as you pull it out.
9. Install a new bulb.
10. Reverse the steps to reinstall the lamp assembly.

6-38 Back-Up and License Plate Lamps
A. Back-Up Lamps
B. License Plate Lamps
To replace the back
-up or license plate lamps, use the
following procedure:
1. Open the trunk using the trunk button on the remote
keyless entry transmitter or the trunk release button
located on the lower part of the driver's door.2. Remove the cloth cover on the trunk lid by pulling
out the three push
-pins located on the underside of
the trunk lid.
3. Remove the eight mounting nuts from the underside
of the trunk lid by turning the nuts counterclockwise.
4. Pull the lamp assembly away from the vehicle to
expose the bulb sockets.
5. Turn the bulb socket one
-quarter turn
counterclockwise and pull the bulb and socket out of
the lamp reflector.
6. Pull the old bulb from the bulb socket keeping the
bulb straight as you pull it out.
7. Install a new bulb.
8. Reverse the steps to reinstall the lamp assembly.