2005 CADILLAC CTS V engine coolant

Speedometer Display
This display will show information relating to vehicle
speed, odometer, and transmission status. The
information displayed can be changed by pressing (C).
Pressing this button cycles the displayed information
as follows: digital speedometer only, odometer
only, speedometer and odometer, or blank display.
When the transmission is shifted into REVERSE (R), an
R will appear in the upper right corner.
During slow speed maneuvers, the engine’s computer
may command the transmission to engage the Skip Shift
feature. For more information seeManual Transmission
Operation on page 2-31.
Tachometer Display
Press (B) to cycle through the following displays:
coolant temperature, oil pressure, oil temperature,
transmission temperature, tire pressure, and lateral
acceleration. Press (A) to cycle through the displays in
reverse order. If you press (A) for about one second
the display will become blank.
Coolant Temperature
When the coolant
temperature is displayed
you will see the coolant
temperature symbol.
The temperature will be displayed in degrees Fahrenheit
or Celsius and there will be a graph at the bottom of
the display. If the graph shows the temperature in
the shaded area all the way on the right, then the
coolant temperature is hot. SeeEngine Overheating on
page 5-28for more information.
3-52

Transmission Fluid Hot Message
When you see this ashing
symbol, the transmission
uid temperature is
high (290°F (143°C)).
To acknowledge this warning, press either button on the
outboard switch on the left spoke of the steering
wheel. After you press this button, the warning will
redisplay every 10 minutes until the temperature returns
to the normal operating range. If this message
appears, you may continue to drive at a slower speed
while monitoring the transmission uid temperature.
Ideally, the transmission oil temperature should not rise
above 265°F (129°C). If you regularly experience
temperatures above this limit due to high performance
operation, it is recommended to use an auxiliary
uid cooler for the transmission and differential. See
your GM dealer for details. If this warning is displayed
during normal vehicle operation on at roads, your
vehicle may need service. See your dealer for an
inspection. SeeDIC Warnings and Messages on
page 3-65andManual Transmission Fluid on page 5-24
for more information.
Hot Coolant Temperature Warning
Message
When you see this ashing
symbol, the engine coolant
temperature is high
(257°F (125°C)).
To acknowledge this warning, press either button on the
outboard switch on the left spoke of the steering
wheel. After you press a button, this warning will
redisplay every 10 minutes until the temperature returns
to the normal operating range. Driving aggressively
or driving on long hills can cause the engine coolant
temperature to be higher than normal. Display of
this warning should correspond with the Engine Coolant
Temperature Warning Light. SeeEngine Coolant
Temperature Warning Light (CTS) on page 3-43for
more information. If this warning is displayed during
normal vehicle operation on at roads, your vehicle may
need service. See your dealer for an inspection.
3-55

Change Trans (Transmission) Fluid
(Automatic Transmission)
This message indicates that the life of the transmission
uid has expired and it should be changed within
200 miles (320 km). SeeScheduled Maintenance on
page 6-4andRecommended Fluids and Lubricants on
page 6-12for the proper uid and change intervals.
When you reset the Change Trans Fluid message by
clearing it from the display, you still must reset the
transmission uid life monitor separately. For more
information on resetting the transmission uid life
monitor, seeAutomatic Transmission Fluid on
page 5-22.
Check Brake Fluid
This message will display if the ignition is in ON to
inform the driver that the brake uid level is low. Have
the brake system serviced by your GM dealer as
soon as possible. SeeBrake System Warning Light on
page 3-41for more information.
Check Coolant Level
This message will appear when there is a low level of
engine coolant. Have the cooling system serviced
by your GM dealer as soon as possible. SeeEngine
Coolant on page 5-25for more information.
Check Gas Cap
When this message appears on the display, the gas cap
has not been fully tightened. You should recheck the
gas cap to ensure that it is on and tightened properly.
See “If the Light Is On Steady” underMalfunction
Indicator Lamp on page 3-45for more information.
Check Washer Fluid
When this message appears on the display, it means
that your vehicle is low on windshield washer uid. You
should rell the tank as soon as possible. See
Windshield Washer Fluid on page 5-37for more
information.
Competitive Driving (CTS-V)
When competitive driving mode is turned on with the
traction control button, this message will be displayed on
the DIC. The TC light will be on when the competitive
driving mode is on. The traction control system will
not operate while in competitive driving mode.
You should adjust your driving accordingly. See the
CTS-V portion ofTraction Control System (TCS) (CTS)
on page 4-8orTraction Control System (TCS)
(CTS-V) on page 4-9for more information.
3-68

Driver Door Ajar
When this message appears on the display, it means
that the driver’s door was not closed completely.
You should make sure that the driver’s door is closed
completely.
Engine Coolant Hot – Idle Engine
This message will appear when the engine coolant
temperature is too hot. Stop and allow the vehicle to idle
until it cools down.
Notice:If you drive your vehicle while the engine is
overheating, severe engine damage may occur. If
an overheat warning appears on the instrument
panel cluster and/or DIC, stop the vehicle as soon
as possible. Do not increase the engine speed above
normal idling speed. SeeEngine Overheating on
page 5-28for more information.
Engine Coolant Hot – AC
(Air Conditioning) Off
This message displays when the engine coolant
becomes hotter than the normal operating temperature.
To avoid added strain on a hot engine, the air
conditioning compressor is automatically turned off.
When the coolant temperature returns to normal, the air
conditioning compressor will turn back on. You can
continue to drive your vehicle.
If this message continues to appear, have the system
repaired by your GM dealer as soon as possible to avoid
damage to the engine or transmission.
Engine Overheated – Stop Engine
This message will appear when the engine has
overheated. Stop the vehicle and turn the engine off
immediately to avoid severe engine damage. See
Engine Overheating on page 5-28. A chime will also
sound when this message is displayed.
Notice:If you drive your vehicle while the engine is
overheating, severe engine damage may occur. If
an overheat warning appears on the instrument
panel cluster and/or DIC, stop the vehicle as soon
as possible. Do not increase the engine speed above
normal idling speed. SeeEngine Overheating on
page 5-28for more information.
3-69

Service............................................................5-3
Doing Your Own Service Work.........................5-4
Adding Equipment to the Outside
of Your Vehicle...........................................5-5
Fuel................................................................5-5
Gasoline Octane............................................5-5
Gasoline Specications....................................5-5
California Fuel...............................................5-6
Additives.......................................................5-6
Fuels in Foreign Countries...............................5-7
Filling the Tank..............................................5-8
Filling a Portable Fuel Container.....................5-10
Checking Things Under the Hood....................5-10
Hood Release..............................................5-11
Engine Compartment Overview.......................5-12
Engine Oil...................................................5-16
Engine Oil Life System..................................5-19
Engine Air Cleaner/Filter................................5-21
Automatic Transmission Fluid.........................5-22
Manual Transmission Fluid.............................5-24
Hydraulic Clutch...........................................5-25
Engine Coolant.............................................5-25
Coolant Surge Tank Pressure Cap..................5-28
Engine Overheating.......................................5-28Overheated Engine Protection
Operating Mode........................................5-30
Cooling System............................................5-31
Power Steering Fluid.....................................5-36
Windshield Washer Fluid................................5-37
Brakes........................................................5-38
Battery........................................................5-41
Jump Starting...............................................5-42
Rear Axle.......................................................5-48
Bulb Replacement..........................................5-49
High Intensity Discharge (HID) Lighting............5-49
Halogen Bulbs..............................................5-49
Front Turn Signal and Fog Lamps...................5-50
Taillamps, Turn Signal, Stoplamps and
Sidemarker Lamps.....................................5-50
Back-Up and License Plate Lamps..................5-51
Replacement Bulbs.......................................5-52
Windshield Wiper Blade Replacement..............5-52
Tires..............................................................5-54
Tire Sidewall Labelling...................................5-56
Tire Terminology and Denitions.....................5-58
Run-Flat Tires (CTS-V)..................................5-61
Ination - Tire Pressure.................................5-62
Section 5 Service and Appearance Care
5-1

Filling a Portable Fuel Container
{CAUTION:
Never ll a portable fuel container while it is in
your vehicle. Static electricity discharge from
the container can ignite the gasoline vapor.
You can be badly burned and your vehicle
damaged if this occurs. To help avoid injury
to you and others:
Dispense gasoline only into approved
containers.
Do not ll a container while it is inside a
vehicle, in a vehicle’s trunk, pickup bed,
or on any surface other than the ground.
Bring the ll nozzle in contact with the
inside of the ll opening before operating
the nozzle. Contact should be maintained
until the lling is complete.
Do not smoke while pumping gasoline.
Checking Things Under
the Hood
{CAUTION:
An electric fan under the hood can start up
and injure you even when the engine is not
running. Keep hands, clothing and tools
away from any underhood electric fan.
{CAUTION:
Things that burn can get on hot engine parts
and start a re. These include liquids like fuel,
oil, coolant, brake uid, windshield washer
and other uids, and plastic or rubber. You or
others could be burned. Be careful not to drop
or spill things that will burn onto a hot engine.
5-10

A. Underhood Fuse Block. SeeUnderhood Fuse Block
on page 5-96.
B. Windshield Washer Fluid Reservoir. See “Adding
Washer Fluid” underWindshield Washer Fluid
on page 5-37.
C. Battery. SeeBattery on page 5-41.
D. Passenger Compartment Air Filter. SeePassenger
Compartment Air Filter on page 3-32.
E. Power Steering Fluid Reservoir (Under Engine
Cover). SeePower Steering Fluid on page 5-36.
F. Engine Oil Fill Cap. See “When to Add Engine Oil”
underEngine Oil on page 5-16.G. Engine Oil Dipstick (Out of View). See “Checking
Engine Oil” underEngine Oil on page 5-16.
H. Brake Master Cylinder Reservoir. See “Brake Fluid”
underBrakes on page 5-38.
I. Hydraulic Clutch Reservoir (If Equipped) (Not
Shown). See “When to Check and What to Use”
underHydraulic Clutch on page 5-25.
J. Engine Coolant Surge Tank and Pressure Cap. See
Coolant Surge Tank Pressure Cap on page 5-28
andCooling System on page 5-31.
K. Engine Air Cleaner/Filter. SeeEngine Air
Cleaner/Filter on page 5-21.
5-13

A. Underhood Fuse Block. SeeUnderhood Fuse Block
on page 5-96.
B. Windshield Washer Fluid Reservoir. See “Adding
Washer Fluid” underWindshield Washer Fluid
on page 5-37.
C. Battery. SeeBattery on page 5-41.
D. Engine Oil Dipstick. See “Checking Engine Oil”
underEngine Oil on page 5-16.
E. Engine Oil Fill Cap. See “When to Add Engine Oil”
underEngine Oil on page 5-16.
F. Power Steering Fluid Reservoir. SeePower Steering
Fluid on page 5-36.G. Brake Master Cylinder Reservoir. See “Brake Fluid”
underBrakes on page 5-38.
H. Hydraulic Clutch Reservoir. See “When to Check
and What to Use” underHydraulic Clutch on
page 5-25.
I. Engine Coolant Surge Tank and Pressure Cap. See
Coolant Surge Tank Pressure Cap on page 5-28
andCooling System on page 5-31.
J. Engine Air Cleaner/Filter. SeeEngine Air
Cleaner/Filter on page 5-21.
5-15