2009 CADILLAC DTS cooling

Fuses Usage
6 Oxygen Sensor
7 Emission Device
8 Transmission, Ignition 1
9Engine Control Module (ECM),
Powertrain Control Module (PCM)
10Climate Control System, Instrument
Panel Cluster Ignition 1
11 Airbag System
12 Horn
13 Windshield Wiper
14 Fog Lamps
15 Right High-Beam Headlamp
16 Left High-Beam Headlamp
17 Left Low-Beam Headlamp
18 Right Low-Beam Headlamp
19 Windshield Washer Pump Motor
20 Left Front Cornering Lamp
21 Right Front Cornering Lamp
22 Air Pump (J-Case)Fuses Usage
23Antilock Brake System (ABS)
(J-Case)
24 Starter (J-Case)
25Antilock Brake System (ABS) Motor
(J-Case)
26 Cooling Fan 2 (J-Case)
27 Cooling Fan 1 (J-Case)
28 Windshield Washer Heater (J-Case)
Relays Usage
29 Powertrain
30 Starter
31 Cooling Fan 2
32 Cooling Fan 3
33 Cooling Fan 1
34 Air Conditioning Clutch
35 Air Injection Reactor (AIR) Solenoid
36 Ignition
37 Air Pump
5-97

Capacities and Specications
The following approximate capacities are given in English and metric conversions. SeeRecommended Fluids and
Lubricants on page 6-11for more information.
ApplicationCapacities
English Metric
Air Conditioning RefrigerantFor the air conditioning system refrigerant charge
amount, see the refrigerant caution label located
under the hood. See your dealer/retailer for more
information.
Cooling System 12.6 qt 12.0 L
Engine Oil with Filter 7.5 qt 7.1 L
Fuel Tank 18.5 gal 70.0 L
Transmission 7.4 qt 7.0 L
Wheel Nut Torque 100 lb ft 140Y
All capacities are approximate. When adding, be sure to ll to the approximate level as recommended in this
manual. Recheck uid level after lling.
Engine Specications
Engine VIN Code Transmission Spark Plug Gap
4.6L DOHC V8 Engine Y Automatic 0.050 in (1.27 mm)
4.6L DOHC V8 Engine 9 Automatic 0.050 in (1.27 mm)
5-103

Scheduled Maintenance
To maintain the ride, handling, and performance of
the vehicle, it is important that the rst tire rotation
service be performed when the vehicle has 5,000 to
8,000 miles (8 000 to 13 000 km). Check tires for
ination pressures and wear. SeeTires on page 5-48.
Rotate tires. SeeTire Inspection and Rotation on
page 5-65and “Tire Wear Inspection” inAt Least Once
a Month on page 6-9.
When the CHANGE ENGINE OIL SOON message
displays in the Driver Information Center (DIC), service
is required for the vehicle. Have the vehicle serviced
as soon as possible within the next 600 miles
(1 000 km). It is possible that, if driving under the best
conditions, the engine oil life system may not indicate
that vehicle service is necessary for over a year.
However, the engine oil and lter must be changed at
least once a year and at this time the system must
be reset. Your dealer/retailer has trained service
technicians who will perform this work using genuine
parts and reset the system.
If the engine oil life system is ever reset accidentally,
service the vehicle within 3,000 miles (5 000 km)
since the last service. Remember to reset the oil life
system whenever the oil is changed. SeeEngine Oil Life
System on page 5-16for information on the Engine
Oil Life System and resetting the system.When the CHANGE ENGINE OIL SOON message
appears, the following services, checks, and inspections
are required:
❑Change engine oil and lter. SeeEngine Oil on
page 5-13. Reset oil life system. SeeEngine Oil Life
System on page 5-16.An Emission Control Service.
❑Visually check for any leaks or damage.
See footnote (k).
❑Inspect engine air cleaner lter. If necessary, replace
lter. SeeEngine Air Cleaner/Filter on page 5-17.
See footnote (m).
❑Rotate tires and check ination pressures and wear.
SeeTire Inspection and Rotation on page 5-65and
“Tire Wear Inspection” inAt Least Once a Month on
page 6-9.
❑Inspect brake system.See footnote (a).
❑Check engine coolant and windshield washer uid
levels and add uid as needed.
❑Perform any needed additional services.
See “Additional Required Services” in this section.
❑Inspect suspension and steering components.
See footnote (b).
❑Inspect engine cooling system.See footnote (c).
❑Inspect wiper blades.See footnote (d).
❑Inspect restraint system components.See footnote (e).
❑Lubricate body components.See footnote (f).
❑Check transmission uid level and add uid
as needed.
6-4

Additional Required Services (cont’d)
Service and Miles (Kilometers)25,000
(40 000)50,000
(80 000)75,000
(120 000)100,000
(160 000)125,000
(200 000)150,000
(240 000)
Replace spark plugs.An Emission
Control Service.•
Except Professional Vehicle: Engine
cooling system service (or every
ve years, whichever occurs rst).
An Emission Control Service.
See footnote (j).•
Professional Vehicle Only: Engine
cooling system service (or every
ve years, whichever occurs rst).
An Emission Control Service.
See footnote (j).••
Inspect engine accessory drive belt.
An Emission Control Service.
See footnote (l).•
6-6

Maintenance Footnotes
(a)Visually inspect brake lines and hoses for proper
hook-up, binding, leaks, cracks, chafing, etc. Inspect disc
brake pads for wear and rotors for surface condition.
Inspect other brake parts, including calipers, parking
brake, etc.
(b)Visually inspect front and rear suspension and
steering system for damaged, loose, or missing parts or
signs of wear. Inspect power steering lines and hoses
for proper hook-up, binding, leaks, cracks, chafing, etc.
(c)Visually inspect hoses and have them replaced if they
are cracked, swollen, or deteriorated. Inspect all pipes,
fittings and clamps; replace with genuine parts as
needed. To help ensure proper operation, a pressure test
of the cooling system and pressure cap and cleaning the
outside of the radiator and air conditioning condenser is
recommended at least once a year.
(d)Inspect wiper blades for wear, cracking, or
contamination. Clean the windshield and wiper blades,
if contaminated. Replace wiper blades that are worn
or damaged. See Windshield Wiper Blade Replacement
on page 5-46 and Windshield and Wiper Blades on
page 5-91 for more information.
(e)Make sure the safety belt reminder light and safety
belt assemblies are working properly. Look for any
other loose or damaged safety belt system parts.If you see anything that might keep a safety belt system
from doing its job, have it repaired. Have any torn or
frayed safety belts replaced. Also see Checking the
Restraint Systems on page 1-70.
(f)Lubricate all key lock cylinders. Lubricate all hinges
and latches, including those for the hood, rear
compartment, glove box door, and console door.
More frequent lubrication may be required when exposed
to a corrosive environment. Applying silicone grease on
weatherstrips with a clean cloth will make them last
longer, seal better, and not stick or squeak.
(g)If driving regularly under dusty conditions, the filter
may require replacement more often.
(h)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.
Professional vehicle uses, such as limousine
service.
Uses such as high performance operation.
6-7

(j)Drain, flush, and refill cooling system. This service
can be complex; you should have your dealer/retailer
perform this service. See Engine Coolant on page 5-23
for what to use. Inspect hoses. Clean radiator,
condenser, pressure cap, and filler neck. Pressure test
the cooling system and pressure cap.
(k)A fluid loss in any vehicle system could indicate a
problem. Have the system inspected and repaired
and the fluid level checked. Add fluid if needed.
(l)Visually inspect belt for fraying, excessive cracks, or
obvious damage. Replace belt if necessary.
(m)If driving regularly under dusty conditions, inspect
the filter at each engine oil change.
Owner Checks and Services
These owner checks and services should be performed
at the intervals specied to help ensure vehicle
safety, dependability, and emission control performance.
Your dealer/retailer can assist with these checks and
services.
Be sure any necessary repairs are completed at once.
Whenever any uids or lubricants are added to the
vehicle, make sure they are the proper ones, as shown
inRecommended Fluids and Lubricants on page 6-11.
At Each Fuel Fill
It is important to perform these underhood checks at
each fuel fill.
Engine Oil Level Check
Notice:It is important to check the engine oil
regularly and keep it at the proper level. Failure to
keep the engine oil at the proper level can cause
damage to the engine not covered by the vehicle
warranty.
Check the engine oil level and add the proper oil
if necessary. SeeEngine Oil on page 5-13.
Engine Coolant Level Check
Check the engine coolant level and add DEX-COOL®
coolant mixture if necessary. SeeEngine Coolant
on page 5-23.
Windshield Washer Fluid Level Check
Check the windshield washer uid level in the windshield
washer uid reservoir and add the proper uid if
necessary.
6-8

Control of a Vehicle.......................................... 4-3
Convenience Net............................................2-63
Coolant
Engine.......................................................5-23
Engine Temperature Gage............................3-60
Engine Temperature Warning Light.................3-59
Surge Tank Pressure Cap.............................5-27
Cooled Seats................................................... 1-5
Cooling System..............................................5-22
Cornering Lamps............................................3-34
Courtesy Lamps.............................................3-35
Courtesy Transportation...................................7-10
Cruise Control................................................3-16
Cruise Control, Active......................................3-19
Cruise Control, Forward Collision Alert (FCA)
System........................................................ 3-9
Cruise Control Light........................................3-66
Cupholders....................................................2-62
Customer Assistance......................................... 7-6
Offices......................................................... 7-6
Text Telephone (TTY) Users........................... 7-6
Customer Information
Service Publications Ordering Information........7-16
Customer Satisfaction Procedure........................ 7-2D
Damage Repair, Collision.................................7-12
Data Recorders
Event.........................................................7-18
Daytime Running Lamps (DRL).........................3-33
Defensive Driving............................................. 4-2
Disc, MP3....................................................3-110
Doing Your Own Service Work........................... 5-4
Door
Central Door Unlocking System.....................2-11
Locks........................................................2-10
Power Door Locks.......................................2-11
Programmable Automatic Door Locks.............2-11
Rear Door Security Locks.............................2-12
Driver Information Center (DIC).........................3-67
DIC Operation and Displays..........................3-68
DIC Vehicle Customization............................3-86
DIC Warnings and Messages........................3-73
Driving
At Night.....................................................4-12
Before a Long Trip......................................4-14
Defensive..................................................... 4-2
Drunk.......................................................... 4-3
4

Driving (cont.)
Highway Hypnosis.......................................4-14
Hill and Mountain Roads..............................4-15
In Rain and on Wet Roads...........................4-12
Loss of Control...........................................4-10
Off-Road Recovery......................................4-10
Rocking Your Vehicle to Get it Out.................4-19
Winter........................................................4-16
Driving for Better Fuel Economy......................... 4-2
Dual Climate Control System............................3-40
E
EDR .............................................................7-17
Electrical Equipment
Add-On Equipment......................................5-94
Electrical System
Fuses and Circuit Breakers...........................5-95
Headlamp Wiring.........................................5-95
Power Windows and Other Power Options......5-95
Rear Underseat Fuse Block..........................5-98
Underhood Fuse Block.................................5-95
Windshield Wiper Fuses...............................5-95
Electronic Immobilizer
PASS-Key
®III+...........................................2-22Electronic Immobilizer Operation
PASS-Key
®III+...........................................2-23
Engine
Air Cleaner/Filter.........................................5-17
Check and Service Engine Soon Lamp...........3-61
Compartment Overview................................5-12
Coolant......................................................5-23
Coolant Heater............................................2-28
Coolant Temperature Gage...........................3-60
Coolant Temperature Warning Light................3-59
Cooling System...........................................5-22
Drive Belt Routing.......................................6-14
Exhaust.....................................................2-36
Oil .............................................................5-13
Oil Life System...........................................5-16
Overheated Protection Operating Mode...........5-30
Overheating................................................5-28
Starting......................................................2-26
Entry Lighting.................................................3-35
eporting Safety Defects to the
United States Government............................7-15
Event Data Recorders.....................................7-18
Extender, Safety Belt.......................................1-32
Exterior Lamps...............................................3-29
Exterior Lighting Battery Saver..........................3-34
5