2006 CADILLAC CTS coolant temperature

Tire Pressure Warning Message
When you see this ashing
symbol, one or more of the
vehicle’s tires is either
under or over-inated.
To acknowledge this warning, press either button on the
outboard switch on the left spoke of the steering
wheel. There are three levels of warning for this display:
1. High Tire Pressure (above 42 psi (290 kPa))
2. Low Tire Pressure (below 25 psi (170 kPa))
3. Flat Tire (below 5 psi (35 kPa))
For conditions 1 and 2, this warning will ash ve times
and the display will then show the tire pressure gage. For
condition 3, this warning will ash continuously until the
driver acknowledges it. In any of the three cases, the
warning will redisplay every 10 minutes until the situation
is corrected. Conditions 2 and 3 will also display a
warning light elsewhere on the cluster that will stay on
after this warning is acknowledged. SeeTire Pressure
Light (CTS-V Only) on page 3-41for more information.
Also seeTire Pressure Monitor System on page 5-68for
more information on tire pressure specications.
One-to-Four Shift Message
If equipped, this message
indicates that you can only
shift from FIRST (1) to
FOURTH (4) instead
of FIRST (1) to
SECOND (2).
You must complete the shift into FOURTH (4) to turn off
this feature. This helps you get the best possible fuel
economy.
After shifting to FOURTH (4), you may downshift to a
lower gear if you prefer.
Notice:Forcing the shift lever into any gear except
FOURTH (4) when the 1 TO 4 SHIFT light comes
on may damage the transmission. Shift only from
FIRST (1) to FOURTH (4) when the light comes on.
This message will come on when:
The engine coolant temperature is higher than
169°F (76°C),
you are going 15 to 19 mph (24 to 31 km/h) and
you are 21 percent throttle or less.
3-52

Check Tire Pressure
If your vehicle has a Tire Pressure Monitor (TPM)
system, this message indicates that one or more of the
vehicle’s tires are low. SeeStatus of Vehicle Systems
on page 3-54for information on checking your vehicle’s
tire pressures. Also, seeTire Pressure Monitor
System on page 5-68andInation - Tire Pressure on
page 5-65for 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 windshield washer uid reservoir as
soon as possible. SeeWindshield Washer Fluid
on page 5-37for more information.
Competitive Driving (CTS-V)
When competitive driving mode is turned on with the
TC (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 4-9orTraction Control System (TCS)
(CTS-V) on page 4-10for more information.
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 – 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.
3-64

Engine Coolant Hot – Idle Engine
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.
This message will appear when the engine coolant
temperature is too hot. Stop and allow the vehicle to idle
until it cools down.
Engine Overheated – Stop Engine
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.
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.
Engine Power Reduced
This message informs you that the vehicle is reducing
engine power to try to protect the engine or transmission
from damage due to extreme operating conditions.
Reduced engine power can affect the vehicle’s ability to
accelerate. If this message is on, but there is no
reduction in performance, proceed to your destination.
The performance may be reduced the next time the
vehicle is driven. The vehicle may be driven at a
reduced speed while this message is on, but
acceleration and speed may be reduced. Anytime this
message stays on, the vehicle should be taken to
your GM dealer for service as soon as possible.
Fuel Level Low
When this message appears on the display, it means
that your vehicle is low on fuel. You should rell the fuel
tank as soon as possible. A single chime will sound
when this message is displayed.
Headlamps Suggested
This message will appear when the amount of available
light outside the vehicle is low and the exterior lamp
control is off. This message informs the driver that
turning on the exterior lamps is recommended even
though the daytime running lamps (DRL) are still
illuminated and it has become dark enough outside to
require the headlamps and/or other exterior lamps.
3-65

Engine Coolant
The cooling system in your vehicle is lled with
DEX-COOL®engine coolant. This coolant is designed
to remain in your vehicle for ve years or 150,000 miles
(240 000 km), whichever occurs rst, if you add only
DEX-COOL
®extended life coolant.
The following explains your cooling system and
how to add coolant when it is low. If you have a problem
with engine overheating, seeEngine Overheating
on page 5-28.
A 50/50 mixture of clean, drinkable water and
DEX-COOL
®coolant will:
Give freezing protection down to−34°F (−37°C).
Give boiling protection up to 265°F (129°C).
Protect against rust and corrosion.
Help keep the proper engine temperature.
Let the warning lights and gages work as they should.
Notice:Using coolant other than DEX-COOL
®may
cause premature engine, heater core, or radiator
corrosion. In addition, the engine coolant may
require changing sooner, at the rst maintenance
service after each 30,000 miles (50 000 km) or
24 months, whichever occurs rst. Any repairs
would not be covered by your warranty. Always use
DEX-COOL
®(silicate-free) coolant in your vehicle.
What to Use
Use a mixture of one-half clean, drinkable water and
one-half DEX-COOL®coolant which will not damage
aluminum parts. If you use this coolant mixture, you
do not need to add anything else.
{CAUTION:
Adding only plain water to your cooling
system can be dangerous. Plain water, or
some other liquid such as alcohol, can boil
before the proper coolant mixture will. Your
vehicle’s coolant warning system is set for the
proper coolant mixture. With plain water or the
wrong mixture, your engine could get too hot
but you would not get the overheat warning.
Your engine could catch re and you or others
could be burned. Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
®coolant.
Notice:If you use an improper coolant mixture, your
engine could overheat and be badly damaged. The
repair cost would not be covered by your warranty.
Too much water in the mixture can freeze and crack
the engine, radiator, heater core, and other parts.
5-26

Windshield Washer Fluid
What to Use
When you need windshield washer uid, be sure to
read the manufacturer’s instructions before use. If you
will be operating your vehicle in an area where the
temperature may fall below freezing, use a uid that
has sufficient protection against freezing.
Adding Washer Fluid
The CHECK WASHER FLUID message will appear
on the Driver Information Center (DIC) when the uid
level is low. SeeDIC Warnings and Messages on
page 3-61for more information.
Open the cap with the
washer symbol on it.
Add washer uid until the
tank is full. SeeEngine
Compartment Overview
on page 5-12for reservoir
location.Notice:
When using concentrated washer uid, follow the
manufacturer’s instructions for adding water.
Do not mix water with ready-to-use washer uid.
Water can cause the solution to freeze and
damage your washer uid tank and other parts of
the washer system. Also, water does not clean as
well as washer uid.
Fill your washer uid tank only three-quarters full
when it is very cold. This allows for expansion if
freezing occurs, which could damage the tank if
it is completely full.
Do not use engine coolant (antifreeze) in your
windshield washer. It can damage your washer
system and paint.
5-37

(h)Change automatic transmission uid and lter 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 uid and lter do not require changing.
(i)Drain, ush, and rell cooling system. This service
can be complex; you should have your dealer perform
this service. See Engine Coolant on page 5-26 for
what to use. Inspect hoses. Clean radiator, condenser,
pressure cap, and ller neck. Pressure test the
cooling system and pressure cap.
(k)A uid loss in any vehicle system could indicate
a problem. Have the system inspected and repaired and
the uid level checked. Add uid if needed.
(l)Change uid if the vehicle is used for high
performance operation.(m)Change uid whenever the vehicle has been
driven for 3,000 miles (5 000 km) with the transmission
temperature at 290°F (143°C) or higher without using
an auxiliary uid cooler. See Message Center (CTS-V)
on page 3-47andTransmission Fluid Hot Message
on page 3-50.
(n)If you drive regularly under dusty conditions, inspect
the lter at each engine oil change.
(p)Visually inspect belt for fraying, excessive cracks,
or obvious damage. Replace belt if necessary.
Owner Checks and Services
These owner checks and services should be performed
at the intervals specied to help ensure the safety,
dependability, and emission control performance of
your vehicle. Your GM Goodwrench
®dealer can assist
you with these checks and services.
Be sure any necessary repairs are completed at once.
Whenever any uids or lubricants are added to your
vehicle, make sure they are the proper ones, as shown
inRecommended Fluids and Lubricants on page 6-13.
6-9

Child Restraints
Child Restraint Systems...............................1-36
Infants and Young Children...........................1-32
Lower Anchors and Tethers for Children..........1-41
Older Children.............................................1-30
Securing a Child Restraint in a
Rear Seat Position...................................1-48
Securing a Child Restraint in the
Right Front Seat Position..........................1-50
Where to Put the Restraint...........................1-40
Cigarette Lighter.............................................3-22
Cleaning
Aluminum or Chrome-Plated Wheels..............5-99
Exterior Lamps/Lenses.................................5-98
Fabric/Carpet..............................................5-96
Finish Care.................................................5-98
Inside of Your Vehicle..................................5-94
Instrument Panel, Vinyl, and Other Plastic
Surfaces.................................................5-97
Leather......................................................5-96
Speaker Covers..........................................5-97
Tires........................................................5-100
Underbody Maintenance.............................5-101
Washing Your Vehicle...................................5-98
Weatherstrips..............................................5-98
Windshield and Wiper Blades........................5-99
Wood Panels..............................................5-97
Climate Control System
Air Filter, Passenger Compartment.................3-29
Dual ..........................................................3-23Climate Control System (cont.)
Outlet Adjustment........................................3-28
Steering Wheel Controls...............................3-30
Clutch, Hydraulic.............................................5-25
Collision Damage Repair..................................7-12
Comfort Guides, Rear Safety Belt.....................1-26
Compact Spare Tire........................................5-94
Compass.......................................................2-39
Competitive Driving.........................................4-18
Competitive Driving Mode................................4-12
Control of a Vehicle.......................................... 4-6
Convenience Net............................................2-50
Coolant
Engine Temperature Gage............................3-40
Engine Temperature Warning Light.................3-40
Heater, Engine............................................2-26
Hot Temperature Warning Message................3-50
Surge Tank Pressure Cap.............................5-28
Cooling System..............................................5-31
Cruise Control................................................3-13
Cruise Control Light........................................3-46
Cupholder(s)..................................................2-49
Customer Assistance Information
Courtesy Transportation.................................. 7-9
Customer Assistance for Text
Telephone (TTY) Users............................... 7-5
Customer Assistance Offices........................... 7-5
Customer Satisfaction Procedure..................... 7-2
GM Mobility Reimbursement Program............... 7-7
3

Engine (cont.)
Check Oil Pressure Message........................3-51
Coolant......................................................5-26
Coolant Heater............................................2-26
Coolant Temperature Gage...........................3-40
Coolant Temperature Warning Light................3-40
Drive Belt Routing.......................................6-16
Engine Compartment Overview......................5-12
Exhaust.....................................................2-37
Oil .............................................................5-16
Oil Life System...........................................5-20
Oil Temperature Warning Message.................3-51
Overheated Protection Operating Mode...........5-30
Overheating................................................5-28
Speed Limiter.............................................3-33
Starting......................................................2-25
Entry Lighting.................................................3-21
Event Data Recorders (EDR)............................7-11
Extender, Safety Belt.......................................1-29
Exterior Lighting Battery Saver..........................3-20
F
Filter
Engine Air Cleaner......................................5-21
Finish Damage.............................................5-101
Flashers, Hazard Warning.................................. 3-6Flash-to-Pass.................................................3-10
Flat Tire........................................................5-82
Flat Tire, Changing.........................................5-84
Flat Tire, Storing.............................................5-93
Fluid
Automatic Transmission................................5-23
Manual Transmission....................................5-24
Power Steering...........................................5-36
Windshield Washer......................................5-37
Fog Lamp Light..............................................3-45
Fog Lamps ....................................................3-19
Folding Rear Seat............................................ 1-9
Fuel............................................................... 5-5
Additives...................................................... 5-6
California Fuel.............................................. 5-6
Filling a Portable Fuel Container....................5-10
Filling Your Tank........................................... 5-8
Fuels in Foreign Countries.............................. 5-7
Gage .........................................................3-46
Gasoline Octane........................................... 5-5
Gasoline Specications.................................. 5-6
Fuses
Fuses and Circuit Breakers.........................5-104
Rear Underseat Fuse Block.........................5-109
Underhood Fuse Block...............................5-105
Windshield Wiper.......................................5-104
5