2005 CADILLAC CTS open hood

If you get the overheat warning with no sign of steam,
try this for a minute or so:
1. In heavy traffic, let the engine idle in NEUTRAL (N)
while stopped. If it is safe to do so, pull off the
road, shift to PARK (P) or NEUTRAL (N) and let
the engine idle.
2. Set the climate controls to the highest heat
setting and fan speed and open the windows,
as necessary.
If you no longer have the overheat warning, you can
drive. Just to be safe, drive slower for about 10 minutes.
If the warning does not come back on, you can drive
normally.
If the warning continues and you have not stopped, pull
over, stop, and park your vehicle right away.
If there is still no sign of steam, you can idle the engine
for three minutes while you are parked. If you still
have the warning,turn off the engine and get everyone
out of the vehicleuntil it cools down.
You may decide not to lift the hood but to get service
help right away.Overheated Engine Protection
Operating Mode
This operating mode allows your vehicle to be driven to
a safe place in an emergency. Should an overheated
engine condition exist, an overheat protection mode
which alternates ring groups of cylinders helps prevent
engine damage. In this mode, you will notice a loss
in power and engine performance. A low coolant and/or
engine overheat warning will indicate that an overheat
condition exists. Driving extended miles (km) and/or
towing a trailer in the overheat protection mode should
be avoided.
Notice:After driving in the overheated engine
protection operating mode, to avoid engine damage,
allow the engine to cool before attempting any
repair. The engine oil will be severely degraded.
Repair the cause of coolant loss and change the oil.
SeeEngine Oil on page 5-16.
5-30

Notice:If you leave your radio or other accessories
on during the jump starting procedure, they could
be damaged. The repairs would not be covered
by your warranty. Always turn off your radio and
other accessories when jump starting your vehicle.
3. Turn off the ignition on both vehicles. Unplug
unnecessary accessories plugged into the cigarette
lighter or the accessory power outlets. Turn off
the radio and all lamps that are not needed. This
will avoid sparks and help save both batteries.
And it could save the radio!
4. Open the hoods and locate the positive (+) and
negative (−) terminal locations of the other vehicle,
as well as the positive (+) terminal location on
your vehicle’s battery. SeeEngine Compartment
Overview on page 5-12for more information on
the location of the battery.
5-43

Power Windows and Other Power
Options
Circuit breakers protect the power windows and power
seats. When the current load is too heavy, the circuit
breaker opens and closes, protecting the circuit until the
problem is xed or goes away.
Fuses and Circuit Breakers
The wiring circuits in your vehicle are protected from
short circuits by a combination of fuses and circuit
breakers. This greatly reduces the chance of res
caused by electrical problems.
Look at the silver-colored band inside the fuse. If the
band is broken or melted, replace the fuse. Be sure you
replace a bad fuse with a new one of the identical
size and rating. If a fuse blows, see your dealer
for service immediately.
If you ever have a problem on the road and don’t have
a spare fuse, you can “borrow” one that has the
same amperage. Pick some feature of your vehicle that
you can get along without — like the radio or cigarette
lighter — and use its fuse, if it is the correct amperage.
Replace it as soon as you can.
The fuses are located in three fuse blocks, one located
in the engine compartment on the passenger’s side
and the other two under the rear seat.
Underhood Fuse Block
The underhood fuse block is located in the engine
compartment on the passenger’s side of the vehicle.
SeeEngine Compartment Overview on page 5-12
for more information on location.
5-96

(e)Make sure the safety belt reminder light and all your
belts, buckles, latch plates, retractors, and anchorages
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 look for any opened or broken airbag
coverings, and have them repaired or replaced.
The airbag system does not need regular maintenance.
(f)Lubricate all key lock cylinders. Lubricate all body
door hinges. Lubricate all hinges and latches, including
those for the hood, rear compartment, console door,
and any folding seat hardware. 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 you drive regularly under dusty conditions, the
lter may require replacement more often.
(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 5-25 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 3-51andTransmission Fluid Hot Message
on page 3-55.
(n)If you drive regularly under dusty conditions, inspect
the lter at each engine oil change.
6-8

Fuses
Fuses and Circuit Breakers...........................5-96
Rear Underseat Fuse Block.........................5-101
Underhood Fuse Block.................................5-96
Windshield Wiper.........................................5-95
G
Gage
Engine Coolant Temperature.........................3-44
Fuel..........................................................3-50
Speedometer..............................................3-37
Tachometer.................................................3-37
Garage Door Opener.......................................2-46
Gasoline
Octane........................................................ 5-5
Specications............................................... 5-5
Glove Box.....................................................2-50
GM Mobility Reimbursement Program.................. 7-5
H
Hazard Warning Flashers................................... 3-6
Head Restraints............................................... 1-6
Headlamps....................................................3-19
Bulb Replacement.......................................5-49
Daytime Running Lamps...............................3-21
Flash-to-Pass..............................................3-10
Front Turn Signal and Fog Lamps..................5-50Headlamps (cont.)
Halogen Bulbs............................................5-49
High Intensity Discharge (HID) Lighting...........5-49
High/Low Beam Changer................................ 3-9
On Reminder..............................................3-21
Washer......................................................3-12
Wiper Activated...........................................3-20
Heated Seats................................................... 1-3
Heater...........................................................3-27
Highbeam On Light.........................................3-50
Highway Hypnosis...........................................4-25
Hill and Mountain Roads..................................4-26
HomeLink
®Wireless Control System.................2-46
HomeLink®Wireless Control System Operation . . . 2-46
Hood
Checking Things Under................................5-10
Release.....................................................5-11
Horn............................................................... 3-6
Hot Coolant Temperature Warning Message........3-55
How to Use This Manual...................................... ii
How to Wear Safety Belts Properly...................1-14
Hydraulic Clutch.............................................5-25
I
Ignition Positions.............................................2-22
Immobilizer....................................................2-19
Immobilizer Operation......................................2-20
Infants and Young Children, Restraints...............1-32
6