2004 CADILLAC XLR cooling

A low coolant level should be indicated by a LOW
COOLANT message on the Driver Information Center. If
it is, you may have a leak at the pressure cap or in
the radiator hoses, heater hoses, radiator, water pump
or somewhere else in the cooling system.
{CAUTION:
Heater and radiator hoses, and other engine
parts, can be very hot. Do not touch them. If
you do, you can be burned.
CAUTION: (Continued)
CAUTION: (Continued)
Do not run the engine if there is a leak. If you
run the engine, it could lose all coolant. That
could cause an engine ®re, and you could be
burned. Get any leak ®xed before you drive the
vehicle.
If there seems to be no leak, with the engine on, check
to see if the electric engine cooling fan is running. If
the engine is overheating, the fan should be running. If
it is not, your vehicle needs service.
Notice:Engine damage from running your engine
without coolant is not covered by your warranty. See
ªOverheated Engine Protection Operating Modeº
in the Index for information on driving to a safe
place in an emergency.
Notice:Using coolant other than DEX-COOLžmay
cause premature engine, heater core or radiator
corrosion. In addition, the engine coolant may
require changing sooner, at 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
ž(silicate-free) coolant in your vehicle.
5-27

How to Add Coolant to the Coolant
Surge Tank
If you have not found a problem yet, check to see if
coolant is visible in the surge tank. If coolant is visible
but the coolant level is not at the proper level, add
a 50/50 of
clean, drinkable waterand DEX-COOLž
coolant at the coolant surge tank, but be sure the cooling
system, including the coolant surge tank pressure
cap, is cool before you do it. See
Engine Coolant on
page 5-20for more information.
If no coolant is visible in the surge tank, add coolant as
follows:
{CAUTION:
Steam and scalding liquids from a hot cooling
system can blow out and burn you badly. They
are under pressure, and if you turn the coolant
surge tank pressure cap Ð even a little Ð they
can come out at high speed. Never turn the
cap when the cooling system, including the
coolant surge tank pressure cap, is hot. Wait
for the cooling system and coolant surge tank
pressure cap to cool if you ever have to turn
the pressure cap.
5-28

{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.
CAUTION: (Continued)
CAUTION: (Continued)
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
ž
coolant.
Notice:In cold weather, water can freeze and crack
the engine, radiator, heater core and other parts.
Use the recommended coolant and the proper
coolant mixture.
{CAUTION:
You can be burned if you spill coolant on hot
engine parts. Coolant contains ethylene glycol
and it will burn if the engine parts are hot
enough. Do not spill coolant on a hot engine.
5-29

1. Park the vehicle on a level surface. You can
remove the coolant surge tank pressure cap
when the cooling system, including the coolant
surge tank pressure cap and upper radiator hose, is
no longer hot. Turn the pressure cap slowly
counterclockwise (left).
If you hear a hiss, wait for that to stop. A hiss
means there is still some pressure left.2. Then keep turning the cap and remove it.
5-30

3. Then ®ll the coolant surge tank with the proper
mixture to the full cold ®ll mark on the front of
the coolant surge tank.4. With the coolant surge tank pressure cap off, start
the engine and let it run until you can feel the upper
radiator hose getting hot. Watch out for the
engine cooling fan.
By this time, the coolant level inside the coolant
surge tank may be lower. If the level is lower, add
more of the proper mixture to the coolant surge tank
until the level reaches the FULL COLD mark
located on the front of the coolant surge tank.
5-31

Wheel Replacement
Replace any wheel that is bent, cracked, or badly rusted
or corroded. If wheel nuts keep coming loose, the
wheel, wheel bolts and wheel nuts should be replaced.
If the wheel leaks air, replace it (except some
aluminum wheels, which can sometimes be repaired).
See your dealer if any of these conditions exist.
Your dealer will know the kind of wheel you need.
Each new wheel should have the same load-carrying
capacity, diameter, width, offset and be mounted
the same way as the one it replaces.
If you need to replace any of your wheels, wheel bolts
or wheel nuts, replace them only with new GM
original equipment parts. This way, you will be sure to
have the right wheel, wheel bolts and wheel nuts
for your vehicle.{CAUTION:
Using the wrong replacement wheels, wheel
bolts or wheel nuts on your vehicle can be
dangerous. It could affect the braking and
handling of your vehicle, make your tires lose
air and make you lose control. You could have
a collision in which you or others could be
injured. Always use the correct wheel, wheel
bolts and wheel nuts for replacement.
Notice:The wrong wheel can also cause problems
with bearing life, brake cooling, speedometer or
odometer calibration, headlamp aim, bumper height,
vehicle ground clearance and tire clearance to the
body and chassis.
5-66

Fuses Usage
5 Stop/Back-Up Lamps
6 Oxygen Sensor
7 Battery 5
8 Parking Lamps
9 Electronic Throttle Control
10 Fuel Pump
11Engine Control Module,
Transmission Control Module
12 Odd Injectors
13 Magnetic Ride Control
14 Emission Controls
15 Air Conditioning Compressor
16 Even Injectors
17 Windshield Washer
18 Headlamp Washer
19 Right Low Beam Headlamp
20 Not Used
21 Left Low Beam Headlamp
22 Fog LampFuses Usage
23 Right High Beam Headlamp
24 Left High Beam Headlamp
25 Not Used
26 Battery 3
27 Anti-Lock Brakes
28 Climate Controls
29 Battery 2
30 Starter
31 Audio Ampli®er
32 Cooling Fan
33 Battery 1
48 Spare
49 Spare
50 Spare
51 Spare
52 Spare
53 Not Used
54 Fuse Puller
5-89

Capacities and Speci®cations
The following approximate capacities are given in English and metric conversions. Please refer toRecommended
Fluids and Lubricants on page 6-11for more information.
ApplicationCapacities
English Metric
Air Conditioning Refrigerant R134a 1.4 lbs 0.64 kg
Cooling System 14.8 quarts 14.0 L
Engine Oil with Filter 8 quarts 7.6 L
Fuel Tank 18 gallons 68 L
Transmission 9.5 quarts 8.5 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 Speci®cations
Engine VIN Code Transaxle Spark Plug Gap Displacement Firing Order
4.6 L PV8 A 5L50 ± E0.040 inches
(1.02 mm)281 cubic inches
(4 563 cc)1-2-7-3-4-5-6-8
5-91