2004 CHEVROLET MONTE CARLO engine overheat

{CAUTION:
An electric engine cooling fan under the hood
can start up even when the engine is not
running and can injure you. Keep hands,
clothing and tools away from any underhood
electric fan.
If the coolant inside the coolant recovery tank is boiling,
don’t do anything else until it cools down. The vehicle
should be parked on a level surface.
The coolant level
should be at or above
the COLD mark on
the coolant recovery tank.
To check the coolant
level, look for the COLD
mark on the side of
the coolant recovery tank
that faces the engine.Check to make sure that the coolant level is up to the
COLD ll level on the side of the coolant recovery tank.
If it isn’t, 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.
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 fans are running.
If the engine is overheating, both fans should be
running. If they aren’t, your vehicle needs service.
5-38

Notice:Engine damage from running your engine
without coolant is not covered by your warranty.
See “Overheated Engine Protection Operating
Mode” in the Index for information on driving to
a safe place in an emergency.
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 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.
How to Add Coolant to the Coolant
Recovery Tank
If you haven’t found a problem yet, but the coolant level
isn’t at the COLD mark, add a 50/50 mixture ofclean,
drinkable waterand DEX-COOL
®engine coolant at
the coolant recovery tank. SeeEngine Coolant on
page 5-31for more information.
{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: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.
5-39

The coolant recovery tank 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.
{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.
When the coolant in the coolant recovery tank is at the
COLD mark, start your vehicle.
If the overheat warning continues, there’s one more
thing you can try. You can add the proper coolant
mixture directly to the radiator, but be sure the cooling
system is cool before you do it.
5-40

How to Add Coolant to the Radiator
Notice:Your engine has a specic radiator ll
procedure. Failure to follow this procedure could
cause your engine to overheat and be severely
damaged.
The radiator pressure cap is located in the front of the
engine compartment on the passenger’s side of the
vehicle, near the diagonal cross brace. SeeEngine
Compartment Overview on page 5-12for more
information on location.1. You can remove the radiator pressure cap when
the cooling system, including the radiator pressure
cap and upper radiator hose, is no longer hot.
Turn the pressure cap slowly counterclockwise until
it rst stops. (Don’t press down while turning the
pressure cap.)
If you hear a hiss, wait for that to stop. A hiss
means there is still some pressure left.
2. Then keep turning the pressure cap, but now push
down as you turn it. Remove the pressure cap.
5-42

Driving Through Deep Standing Water...............4-20
Driving Through Flowing Water.........................4-20
Driving with a Trailer.......................................4-42
Dual Climate Control System............................3-21
E
Easy Entry Seat............................................... 1-7
Electrical System
Add-On Equipment.....................................5-103
Fuses and Circuit Breakers.........................5-104
Headlamp Wiring.......................................5-103
Power Windows and Other Power Options....5-103
Windshield Wiper Fuses.............................5-103
Emergency Trunk Release Handle.....................2-12
Emissions Inspection and
Maintenance Programs.................................3-41
Engine
Air Cleaner/Filter.........................................5-26
Battery.......................................................5-53
Change Oil Message...................................3-47
Check and Service Engine Soon Light............3-39
Coolant......................................................5-31
Coolant Heater............................................2-20
Coolant Temperature Gage...........................3-38
Drive Belt Routing.......................................6-14
Engine Compartment Overview......................5-12Engine (cont.)
Exhaust.....................................................2-29
Low Oil Level Message................................3-46
Oil .............................................................5-18
Overheating................................................5-34
Starting......................................................2-18
Supercharger Oil.........................................5-24
Engine Cooling When Trailer Towing..................4-45
Engine Oil Additives........................................5-22
Entry Lighting.................................................3-17
Erasing HomeLink
®Buttons..............................2-39
Event Data Records (EDR)..............................7-10
EXIT (Exit Feature
Customization Mode)....................................2-50
Express-Down Window....................................2-14
Extender, Safety Belt.......................................1-28
Exterior Lamps...............................................3-14
F
Filter
Engine Air Cleaner......................................5-26
Finding a Program Type (PTY)
Station (RDS and XM™)..............3-60, 3-71, 3-82
Finding a Station............................3-58, 3-69, 3-80
Finish Care....................................................5-98
Finish Damage...............................................5-99
5

N
New Vehicle Break-In......................................2-17
Normal Maintenance Replacement Parts............6-13
O
Odometer......................................................3-32
Off-Road Recovery..........................................4-14
Oil
Engine.......................................................5-18
Pressure Indicator Light................................3-41
Pressure Message.......................................3-46
Supercharger, Engine...................................5-24
OIL LIFE (GM Oil Life System Reset)................2-43
Older Children, Restraints................................1-29
Online Owner Center........................................ 7-4
OnStar
®Personal Calling.................................2-35
OnStar®Services............................................2-35
OnStar®System.............................................2-34
OnStar®Virtual Advisor....................................2-35
ORIG. SET (Return to the Original Settings).......2-49
Other Warning Devices...................................... 3-6
Outlet Adjustment............................................3-26
Outside
Convex Mirror.............................................2-34
Heated Mirrors............................................2-34
Power Mirrors.............................................2-33Overheated Engine Protection Operating Mode . . . 5-34
Overseas – Customer Assistance........................ 7-5
Owner Checks and Services.............................. 6-9
Owners, Canadian............................................... ii
Owner’s Information........................................7-14
P
Parade Dimming.............................................3-18
Park (P)
Shifting Out of............................................2-28
Parking
Brake........................................................2-25
Over Things That Burn.................................2-28
Parking on Hills..............................................4-44
Park(P)
Shifting Into................................................2-26
Passenger Compartment Air Filter.....................3-27
Passing.................................................4-14, 4-42
Passlock
®......................................................2-16
Plan Ahead When Possible................................ 7-8
Playing a Cassette Tape..........................3-64, 3-86
Playing a CD.........................................3-75, 3-89
Playing the Radio...........................3-57, 3-68, 3-79
Power
Accessory Outlets........................................3-19
Door Locks.................................................. 2-9
Electrical System.......................................5-103
10