2006 CHEVROLET IMPALA coolant level

ENGINE HOT A/C (Air
Conditioning) OFF
This message will display when the engine coolant
becomes hotter than the normal operating temperature.
To avoid added strain on a hot engine, the air
conditioning compressor is automatically turned off.
When the coolant temperature returns to normal,
the A/C operation will automatically resume. You can
continue to drive your vehicle. If this message continues
to appear, have the system repaired by your GM dealer
as soon as possible to avoid compressor damage.
ENGINE OIL LOW ADD OIL
This message will display when the vehicle’s engine
oil is low. Fill the oil to the proper level as soon as
possible. SeeEngine Compartment Overview on
page 5-12for the engine oil ll location. Also, see
Engine Oil on page 5-17for information on the kind of
oil to use and the proper oil level.
ENGINE OVERHEATED IDLE ENGINE
Notice:If you drive your vehicle while the engine
is overheating, severe engine damage may occur.
If an overheat warning appears on the instrument
panel cluster and/or DIC, stop the vehicle as soon as
possible. Do not increase the engine speed above
normal idling speed. SeeEngine Overheating
on page 5-29for more information.This message will display when the engine coolant
temperature is too hot. Stop and allow the vehicle to idle
until it cools down.
ENGINE OVERHEATED STOP ENGINE
Notice:If you drive your vehicle while the engine
is overheating, severe engine damage may occur.
If an overheat warning appears on the instrument
panel cluster and/or DIC, stop the vehicle as soon as
possible. Do not increase the engine speed above
normal idling speed. SeeEngine Overheating
on page 5-29for more information.
This message will display along with a continuous
chime when the engine has overheated. Stop and turn
the engine off immediately to avoid severe engine
damage. SeeEngine Overheating on page 5-29.
ENGINE POWER IS REDUCED
This message will display when the vehicle’s engine
power is reduced. Reduced engine power can affect the
vehicle’s ability to accelerate. If this message is on,
but there is no reduction in performance, proceed
to your destination. The performance may be reduced
the next time the vehicle is driven. The vehicle may
be driven at a reduced speed while this message is on,
but acceleration and speed may be reduced. Anytime
this message stays on, the vehicle should be taken
to your GM dealer for service as soon as possible.
3-47

A. Windshield Washer Fluid Reservoir. See “Adding
Washer Fluid” underWindshield Washer Fluid
on page 5-39.
B. Battery. SeeBattery on page 5-43.
C. Underhood Fuse Block. SeeUnderhood Fuse Block
on page 5-96.
D. Remote Positive (+) Terminal. SeeJump Starting
on page 5-44.
E. Coolant Recovery Tank. See “Checking Coolant”
underCooling System on page 5-31.
F. Pressure Cap. SeePressure Cap on page 5-28.
G. Power Steering Fluid Cap. SeePower Steering Fluid
on page 5-38.H. Engine Oil Fill Cap. See “When to Add Engine Oil”
underEngine Oil on page 5-17.
I. Engine Oil Dipstick. See “Checking Engine Oil”
underEngine Oil on page 5-17.
J. Automatic Transaxle Fluid Dipstick (Out of View).
See “Checking the Fluid Level” underAutomatic
Transaxle Fluid on page 5-23.
K. Brake Master Cylinder Reservoir. See “Brake Fluid”
underBrakes on page 5-40.
L. Engine Air Cleaner/Filter. SeeEngine Air
Cleaner/Filter on page 5-22.
5-13

A. Windshield Washer Fluid Reservoir. See “Adding
Washer Fluid” underWindshield Washer Fluid
on page 5-39.
B. Battery. SeeBattery on page 5-43.
C. Underhood Fuse Block. SeeUnderhood Fuse Block
on page 5-96.
D. Remote Positive (+) Terminal. SeeJump Starting
on page 5-44.
E. Coolant Recovery Tank. See “Checking Coolant”
underCooling System on page 5-31.
F. Pressure Cap. SeePressure Cap on page 5-28.
G. Power Steering Fluid Cap. SeePower Steering Fluid
on page 5-38.H. Engine Oil Fill Cap. See “When to Add Engine Oil”
underEngine Oil on page 5-17.
I. Engine Oil Dipstick. See “Checking Engine Oil”
underEngine Oil on page 5-17.
J. Automatic Transaxle Fluid Dipstick (Out of View).
See “Checking the Fluid Level” underAutomatic
Transaxle Fluid on page 5-23.
K. Brake Master Cylinder Reservoir. See “Brake Fluid”
underBrakes on page 5-40.
L. Engine Air Cleaner/Filter. SeeEngine Air
Cleaner/Filter on page 5-22.
5-15

A. Windshield Washer Fluid Reservoir. See “Adding
Washer Fluid” underWindshield Washer Fluid
on page 5-39.
B. Battery. SeeBattery on page 5-43.
C. Underhood Fuse Block. SeeUnderhood Fuse Block
on page 5-96.
D. Remote Positive (+) Terminal. SeeJump Starting
on page 5-44.
E. Pressure Cap. SeePressure Cap on page 5-28.
F. Power Steering Fluid Reservoir. SeePower Steering
Fluid on page 5-38.
G. Engine Oil Dipstick. See “Checking Engine Oil”
underEngine Oil on page 5-17.
H. Engine Oil Fill Cap. See “When to Add Engine Oil”
underEngine Oil on page 5-17.
I. Automatic Transaxle Fluid Dipstick. See “Checking
the Fluid Level” underAutomatic Transaxle Fluid
on page 5-23.
J. Brake Master Cylinder Reservoir. See “Brake Fluid”
underBrakes on page 5-40.
K. Engine Air Cleaner/Filter. SeeEngine Air
Cleaner/Filter on page 5-22.
L. Coolant Recovery Tank. See “Checking Coolant”
underCooling System on page 5-31.Engine Oil
If the ENGINE OIL LOW ADD OIL message appears
in the Driver Information Center (DIC), it means
you need to check the engine oil level right away.
For more information, seeDIC Warnings and Messages
on page 3-45. You should check the engine oil level
regularly; this is an added reminder.
Checking Engine Oil
It is a good idea to check the engine oil every time you
get fuel. In order to get an accurate reading, the oil
must be warm and the vehicle must be on level ground.
The engine oil dipstick handle is a yellow loop. See
Engine Compartment Overview on page 5-12for
the location of the engine oil dipstick.
1. Turn off the engine and give the oil several minutes
to drain back into the oil pan. If you do not do this,
the oil dipstick might not show the actual level.
2. Pull out the dipstick and clean it with a paper towel
or cloth, then push it back in all the way. Remove it
again, keeping the tip down, and check the level.
5-17

Notice:If you use an improper coolant mixture,
your engine could overheat and be badly damaged.
The repair cost would not be covered by your
warranty. Too much water in the mixture can freeze
and crack the engine, radiator, heater core, and
other parts.
If coolant needs to be added more than four times a
year, have your dealer check the cooling system.
Notice:If you use extra inhibitors and/or additives
in your vehicle’s cooling system, you could
damage your vehicle. Use only the proper mixture
of the engine coolant listed in this manual for
the cooling system. SeeRecommended Fluids and
Lubricants on page 6-12for more information.Checking Coolant
The coolant recovery tank
cap has this symbol on it.
SeeEngine Compartment Overview on page 5-12
for more information on the location of the coolant
recovery tank.
The vehicle must be on a level surface when checking
the coolant level.
When the engine is cold, the coolant level should be
at the cold ll line or a little higher. The cold ll line
is marked with the same symbol as the coolant recovery
tank cap.
5-27

Adding Coolant
If more coolant is needed, add the proper DEX-COOL®
coolant mixture at the coolant recovery tank, but be
careful not to spill it.
If the coolant recovery tank is completely empty, add
coolant to the radiator. SeeEngine Overheating
on page 5-29.
{CAUTION:
Turning the radiator pressure cap when the
engine and radiator are hot can allow steam
and scalding liquids to blow out and burn
you badly. With the coolant recovery tank, you
will almost never have to add coolant at the
radiator. Never turn the radiator pressure
cap — even a little — when the engine and
radiator are hot.
{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.
Occasionally check the coolant level in the radiator.
For information on how to add coolant to the radiator,
seeCooling System on page 5-31.
Pressure Cap
Notice:If the pressure cap is not tightly installed,
coolant loss and possible engine damage may
occur. Be sure the cap is properly and tightly
secured.
SeeEngine Compartment Overview on page 5-12for
more information on location.
5-28

A. Pressure Cap
B. Electric Engine Cooling Fans
C. Coolant Recovery Tank
{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, do not do anything else until it cools down.
The vehicle should be parked on a level surface.
If your vehicle has one of the V6 engines, the coolant
recovery tank is located in the rear of the engine
compartment on the passenger’s side of the vehicle.
If your vehicle has the 5.3L V8 engine, the coolant
recovery tank is located in the rear of the engine
compartment on the driver’s side of the vehicle.
SeeEngine Compartment Overview on page 5-12. 5.3L V8 Engine
5-32

When the engine is cold, the coolant level should be
at or above the cold ll line on the coolant recovery tank.
To check the coolant level, look for the cold ll line on
the side of the coolant recovery tank that faces the
engine. If the level is not correct, there may be 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, the fans should be running.
If the fans are not running, your vehicle needs service.
Notice:Engine damage from running your
engine without coolant is not covered by your
warranty. SeeOverheated Engine Protection
Operating Mode on page 5-31for 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 could
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.
5-33