cooling CADILLAC DEVILLE 1997 7.G User Guide

Downloaded from www.Manualslib.com manuals search engine If it isn’t, the coolant level should be indicated by a
CHECK COOLANT LEVEL message on the Driver
Information Center. If it is, you may have a leak in the
radiator hoses, heater hoses, radiator, water pump or
somewhere else in the cooling system. Heater and radiator
hoses, and other engine
parts, can be very hot. Don’t touch them.
If you
do, you can be burned.
Don’t run the engine if there
is a leak. If you run
the engine, it could lose all coolant. That could
cause an engine fire, and you could be burned.
Get any leak fixed before you drive the vehicle.
ICE:
Engine damage if you keep running your engine
without coolant isn’t covered by your warranty.
See “Overheated Engine Protection Operating
Mode” in the Index.
If there
seems to be no leak, with the engine on, check to
see if the electric engine fans are running.
If the engine
is overheating, both fans should be running. If they
aren’t, your vehicle needs service.
5-19

Downloaded from www.Manualslib.com manuals search engine How to Add Coolant to the Coolant
Surge
lank
If you haven’t found a problem yet, but the coolant level
isn’t at the proper level
(2.5 inches (6.4 cm) below the
base of the fill neck), add
a 50/50 mixture of clean
water (preferably distilled) and DEX-COOL@ 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” in the Index for
more information.)
A 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
-- even a little -- 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.
5-20

Downloaded from www.Manualslib.com manuals search engine ‘I, .b : .H
I A CAUTION:
Adding only plain water to your cooling system
can be dangerous. Plain water,
or some other
liquid like alcohol, can boil before the proper
coolant mix will. Your vehicle’s coolant warning
system
is set for the proper coolant mix. With
plain water or the wrong mix, your engine could
get too hot but you wouldn’t get the overheat
warning. Your engine could catch fire and you or
others could be burned. Use a
50/50 mix of clean
water and DEX-COOL@coolant.

Downloaded from www.Manualslib.com manuals search engine NOTICE:
In cold weather, water can freeze and crack the
engine, radiator, heater core and other parts.
So
use the recommended coolant.
I
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. Don’t spill coolant on
a hot engine.
1. 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
until it first stops. (Don’t press
down while turning the pressure cap.)
If you hear a hiss, wait for that to ston A hiss means
there is still some pressure left.
5-22

Downloaded from www.Manualslib.com manuals search engine How to Reset Transaxle Fluid
Change Indicator
Your vehicle is equipped with a transaxle fluid change
indicator.
A CHANGE TRANS FLUID message will
display
on the Driver Information Center (DIC) when
the powertrain computer determines
that the transaxle
fluid needs to be changed or at each
100,000 miles
(160 000 km) interval, whichever occurs first. When
this message appears, change the transaxle fluid and
reset
the transaxle fluid life indicator as follows:
1. Turn the ignition on but do not start the engine.
2. Press and hold the OFF and rear defog buttons on the
climate control at the same time until the
TRANS
FLUID RESET message appears on the DIC.
Engine Coolant
The cooling s stem in your vehicle is filled with
DEX-COOL engine coolant. This coolant is designed
to remain
in your vehicle for 5 years or 150,000 miles
(240 000 km) whichever occurs first, 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, see “Engine Overheating” in
the Index.
J
A 50/50 mixture of 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: ~ ~~ ~ -
When adding coolant, it is important that you
use only
DEX-COOL@ (silicate-free) coolant.
If coolant other than DEX-COOL@ is added to
the system, premature engine, heater core or
radiator corrosion may result. In addition, the
engine coolant will require change sooner
-- at
30,000 miles (50 000 km) or 24 months,
whichever occurs first. Damage caused by the use
of coolant other than DEX-COOL@ is not
covered by your new vehicle warranty.

Downloaded from www.Manualslib.com manuals search engine What to Use
Use a mixture of one-half clean water (preferably
distilled) and one-half
DEX-COOL@ coolant which
won’t damage aluminum
parts. If you use this mixture,
you don’t need to add anything else.
Adding only plain water to your cooling system
can be dangerous. Plain water, or some other
liquid like alcohol, can boil before the proper coolant
mix will. Your vehicle’s coolant warning
system is set for the proper coolant mix. With
plain water or the wrong mix, your engine could
get too hot but you wouldn’t get the overheat
warning. Your engine could catch fire and you or
others could be burned. Use a
50/50 mix of clean
water and
DEX-COOL@ coolant.
I NOTICE:
If you use an improper coolant mix, your engine
could overheat and be badly damaged. The
repair cost wouldn’t be covered by your
warranty.
Too much water in the mix can freeze
and crack the engine, radiator, heater core and
other parts.
If you have to add coolant more than four times a year,
have your dealer check your cooling system.
I NOTICE:
If you use the proper coolant, you don’t have to
add extra inhibitors or additives which claim to
improve the system. These can be harmful.
6-22

Downloaded from www.Manualslib.com manuals search engine Checking Coolant
The surge tank is located next to the engine block on the
passenger’s side of the engine.
The cooling system
is under a lot of pressure when it is
hot.
If the CHECK COOLANT LEVEL message
appears on the DIC, you will need to add coolant.
”urning the surge tank pressure cap when the
engine and radiator are hot can allow steam and
scalding liquids to blow out and burn you badly.
Never turn the surge tank pressure cap
-- even a
little
-- when the engine and radiator are hot.
When your engine is cold, the coolant level should be at
the FULL COLD mark, which is
2.5 inches (6.4 cm)
below the base
of the fill neck. Use a flashlight as
necessary to see into the tank.
..... ......................... ................. ................... . ... ............ ............. ..I.. ... .................. ..................................... *....I. ...... . .”... ... ”.. ...... ...... .......... ....... ..... ................... ”
If this message comes on, it means you’re low on
engine coolant.
6-23

Downloaded from www.Manualslib.com manuals search engine 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
Cadillac model.
---
~ Using the wrong replacement wheels, wneel 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.
I 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 or
tire chain clearance to the body and chassis.
See “Changing a Flat Tire” in the Index for more
information.
Putting a used wheel on your vehicle is
dangerous. You can’t know how it’s been used or
how far it’s been driven. It could fail suddenly
and cause an accident.
If you have to replace a
wheel, use a new
GM original equipment wheel.
6-47

Downloaded from www.Manualslib.com manuals search engine Fuse
INADVERT LAMPS
IGN
1
WINDOWS
SEATS
Usage
Inadvertent Power Relay, Interior Lamps Fuse, Cigarette Lighter-
1
Fuse, Cigarette Lighter-2 Fuse
Headlamp Wash Relay (Export),
Headlamps Fusemelay, High/Low
Beam Control Relay, Fog
LampDRL Fuse, Hazard Fuse,
Mirror Fuse, Inadvertent Power
Relay, Right and Left High Beam
Fuse, Right and Left Low Beam
Fuse, Stop Fuse, Fog Lamp Relay
(DeVille Concours Only),
DRL Relay
Rear Ignition-
1 Relay, Wiper
Fuse, Relay Ignition-1 Fuse, Supplemental Inflatable Restraint
(SIR) Fuse, Accessory Relay
Delayed Accessory Bus (DAB)
Relay
Horn Relay, Driver and Passenger
Lumbar
In/Out Relays, Driver and
Passenger Upmown Relays
Fuse
Front and Rear Ignition- 1 Relay,
IGN l*
Steering Column Ignition Switch
BATT
2 Steering Column Ignition
Switch
BATT
3
Usage
Oxygen Sensor 1 and 2 Fuse, Fuel
Fuse, Cruise Fuse, DRL Relay,
Front and Rear Fog Lamp Relay,
Control Power Back-up Relay,
Ignition-
1 Fuse
BATT
1 Starter Relay and Solenoid,
ParMRev Fuse, Park Relay, PCM
Fuse, AC Compressor Fuse and
Relay, Fan Relay
BRAKES
* Do not alter OBD I1 related fuses or circuit breakers.
Cooling
Fan Relays
1 and 3 COOL FNS
ABS Brake Modulator
6-61
___~

Downloaded from www.Manualslib.com manuals search engine Fuse
STOP .
MIRROR
DRL
IGN
0 (ENG)*
ABS
Usage
Stoplamp Switch, Turn Hazard
Switch, ABS Controller, Stepper
Motor Cruise Control, Right and Left
Rear Stoplamps (Export)
Inadvertent Power Relay, Left
Outside Rearview Mirror Switch,
ALDL, Memory Mirror Module
Dimmer Switch, Cluster
Daytime Running Lamp (DRL)
Relay, Left and Right Low Beam in
DRL Mode, DRL Switch
Powertrain Control Module (PCM)
Anti-Lock Brake System
(ABS)/Traction Control System
I Fuse I Usage I
IGN- 1 Rear Ignition-1 Relay, Front and
Rear
Fog Lamp Relays, Control
Power Back-up,
DRL Relay
~
I WIPERS I Accessory Relay, Wiper Switch I
A/C COMP AC Compressor Relay, Cooling Fan
Relays
1,2,3, Compressor Clutch I
I A/C COMP I A/C Compressor I
I PCM (BAT)* I PCM
- I