2011 CHEVROLET IMPALA engine coolant

Black plate (7,1)Chevrolet Impala Owner Manual - 2011
Vehicle Care 10-7
A. Windshield Washer FluidReservoir. See “Adding Washer
Fluid” under Washer Fluid on
page 10‑22.
B. Battery. See Battery on
page 10‑25.
C. Underhood Fuse Block. See Engine Compartment Fuse
Block on page 10‑34.
D. Remote Positive (+) Terminal. See Jump Starting on
page 10‑70. E. Coolant Recovery Tank. See
“Checking Coolant” under
Cooling System on page 10‑15.
F. Pressure Cap. See Cooling
System on page 10‑15.
G. Power Steering Fluid Cap. See Power Steering Fluid on
page 10‑21.
H. Engine Oil Fill Cap. See “When to Add Engine Oil”
under Engine Oil on page 10‑8.
I. Engine Oil Dipstick. See “Checking Engine Oil” under
Engine Oil on page 10‑8. J. Automatic Transmission Fluid
Dipstick (Out of View). See
“Checking the Fluid Level”
under Automatic Transmission
Fluid on page 10‑11.
K. Brake Master Cylinder Reservoir. See “Brake Fluid”
under Brakes on page 10‑23.
L. Engine Air Cleaner/Filter. See Engine Air Cleaner/Filter
on page 10‑13.

Black plate (15,1)Chevrolet Impala Owner Manual - 2011
Vehicle Care 10-15
Cooling System
The cooling system allows the
engine to maintain the correct
working temperature.
3.5 L V6 Engine Shown, 3.9 LV6 Engine Similar
A. Coolant Recovery Tank
B. Pressure Cap
C. Electric Engine Cooling Fan (Out of View)
{WARNING
An electric engine cooling fan
under the hood can start up even
when the engine is not running
and can cause injury. Keep
hands, clothing, and tools away
from any underhood electric fan.
{WARNING
Heater and radiator hoses, and
other engine parts, can be very
hot. Do not touch them. If you do,
you can be burned.
(Continued)
WARNING (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 fire, and you
could be burned. Get any leak
fixed before you drive the vehicle.
Notice: Using coolant other
than DEX-COOL
®can cause
premature engine, heater core,
or radiator corrosion. In addition,
the engine coolant could require
changing sooner, at 50 000 km
(30,000 miles) or 24 months,
whichever occurs first. Any
repairs would not be covered by
the vehicle warranty. Always use
DEX-COOL (silicate-free) coolant
in the vehicle.

Black plate (16,1)Chevrolet Impala Owner Manual - 2011
10-16 Vehicle Care
Engine Coolant
The cooling system in the vehicle is
filled with DEX-COOL®engine
coolant. This coolant is designed to
remain in the vehicle for 5 years or
240 000 km (150,000 mi), whichever
occurs first.
The following explains the cooling
system and how to check and add
coolant when it is low. If there is a
problem with engine overheating,
see Engine Overheating on
page 10‑19
What to Use
{WARNING
Adding only plain water or some
other liquid to the cooling system
can be dangerous. Plain water
and other liquids, can boil before
the proper coolant mixture will.
(Continued)
WARNING (Continued)
The vehicle's coolant warning
system is set for the proper
coolant mixture. With plain water
or the wrong mixture, the engine
could get too hot but you would
not get the overheat warning. The
engine could catch fire and you or
others could be burned. Use a
50/50 mixture of clean, drinkable
water and DEX-COOL coolant.
Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
coolant. If using this mixture,
nothing else needs to be added.
This mixture:
.Gives freezing protection down
to −37°C (−47°F), outside
temperature.
.Gives boiling protection up to
129°C (265°F), engine
temperature.
.Protects against rust and
corrosion.
.Will not damage aluminum parts.
.Helps keep the proper engine
temperature.
Notice: If an improper coolant
mixture is used, the engine could
overheat and be badly damaged.
The repair cost would not be
covered by the vehicle warranty.
Too much water in the mixture
can freeze and crack the engine,
radiator, heater core, and
other parts.
Notice: If extra inhibitors
and/or additives are used in the
vehicle's cooling system, the
vehicle could be damaged. Use
only the proper mixture of the
engine coolant listed in this
manual for the cooling system.
See Recommended Fluids and
Lubricants on page 11‑6 for more
information.

Black plate (17,1)Chevrolet Impala Owner Manual - 2011
Vehicle Care 10-17
Checking Coolant
The vehicle must be on a level
surface when checking the
coolant level.
Check to see if coolant is visible in
the coolant recovery tank. If the
coolant inside the coolant recovery
tank is boiling, do not do anything
else until it cools down. If coolant is
visible but the coolant level is not at
or above the COLD FILL line, add a
50/50 mixture of clean, drinkable
water and DEX-COOL coolant at
the coolant recovery tank, but be
sure the cooling system is cool
before this is done.
The coolant recovery tank
is located in the rear of the
engine compartment on the
passenger side of the vehicle.
SeeEngine Compartment Overview
on page 10‑6. When the engine is cold, the coolant
level should be at or above the
COLD FILL line on the coolant
recovery tank. To check the coolant
level, look for the COLD FILL line on
the side of the coolant recovery tank
that faces the engine. If the level is
not correct, there may be a leak in
the cooling system.
How to Add Coolant to the
Recovery Tank
{WARNING
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.
Notice: This vehicle has a
specific coolant fill procedure.
Failure to follow this procedure
could cause the engine to
overheat and be severely
damaged. If coolant is needed, add the proper
DEX-COOL coolant mixture at the
coolant recovery tank.
When the coolant level in the
coolant recovery tank is at the
COLD FILL line, start the vehicle.
If the overheat warning continues,
there is one more thing you can try.
The proper coolant mixture can be
added directly to the cooling system
through the coolant fill neck on the
engine, but be sure the system is
cool before doing it.

Black plate (18,1)Chevrolet Impala Owner Manual - 2011
10-18 Vehicle Care
How to Add Coolant to the
Radiator
{WARNING
An electric engine cooling fan
under the hood can start up even
when the engine is not running
and can cause injury. Keep
hands, clothing, and tools away
from any underhood electric fan.
{WARNING
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 surge tank pressure
cap—even a little —they can
come out at high speed. Never
turn the cap when the cooling
system, including the surge tank
pressure cap, is hot.
(Continued)
WARNING (Continued)
Wait for the cooling system and
surge tank pressure cap to cool if
you ever have to turn the
pressure cap.
If coolant is needed, add the proper
mixture directly to the radiator, but
be sure the cooling system is cool
before this is done.
1. Remove the pressure cap when the cooling system, including
the pressure cap and upper
radiator hose is no longer hot.
Turn the pressure cap
slowly counterclockwise.
If a hiss is heard, wait for that to
stop. A hiss means that there is
still some pressure left. 2. Keep turning the pressure cap
and remove it.
3. Fill the cooling system with the proper DEX-COOL coolant
mixture, up to the base of the
filler neck. See “What to use”for
more information about the
proper coolant mixture. Rinse or
wipe any spilled coolant from the
engine and the compartment.
4. Then fill the coolant recovery tank to the COLD FILL line.

Black plate (19,1)Chevrolet Impala Owner Manual - 2011
Vehicle Care 10-19
5. Install the coolant recovery tankcap and the pressure cap. After
a day or two of driving, when the
engine is cold, check the coolant
level in the recovery tank. If it is
low, refill it to the COLD
FILL line.
If the coolant in the recovery tank is
constantly low, have a dealer
service department inspect the
vehicle for leaks.
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.Engine Overheating
The vehicle has several indicators
to warn of engine overheating.
There is a coolant temperature
gauge and a warning light on the
instrument panel that indicate an
overheated engine condition. See
Engine Coolant Temperature Gauge
on page 5‑13 andEngine Coolant
Temperature Warning Light on
page 5‑22.
In addition, there is an ENGINE
OVERHEATED IDLE ENGINE and
an ENGINE OVERHEATED STOP
ENGINE message displayed on the
vehicle Driver Information Center
(DIC). See Engine Cooling System
Messages on page 5‑30 for more
information.
If it is decided not to lift the hood
when this warning appears, but
instead get service help right away,
see Roadside Assistance Program
on page 13‑7. If it is decided to lift the hood, make
sure the vehicle is parked on a
level surface.
Then check to see if the engine
cooling fans are running. If the
engine is overheating, both fans
should be running. If they are not,
do not continue to run the engine
and have the vehicle serviced.
Notice:
Engine damage from
running the engine without
coolant is not covered by
the warranty.
Notice: If the engine catches fire
while driving with no coolant, the
vehicle can be badly damaged.
The costly repairs would not be
covered by the vehicle warranty.
See Overheated Engine
Protection Operating Mode on
page 10‑21 for information on
driving to a safe place in an
emergency.

Black plate (20,1)Chevrolet Impala Owner Manual - 2011
10-20 Vehicle Care
If Steam is Coming from the
Engine Compartment
{WARNING
Steam from an overheated engine
can burn you badly, even if you
just open the hood. Stay away
from the engine if you see or hear
steam coming from it. Turn it off
and get everyone away from the
vehicle until it cools down. Wait
until there is no sign of steam or
coolant before you open
the hood.
If you keep driving when the
vehicles engine is overheated,
the liquids in it can catch fire. You
or others could be badly burned.
Stop the engine if it overheats,
and get out of the vehicle until the
engine is cool.(Continued)
WARNING (Continued)
SeeOverheated Engine
Protection Operating Mode on
page 10‑21 for information on
driving to a safe place in an
emergency.
If No Steam is Coming from
the Engine Compartment
If an engine overheat warning is
displayed but no steam can be seen
or heard, the problem may not be
too serious. Sometimes the engine
can get a little too hot when the
vehicle:
.Climbs a long hill on a hot day
.Stops after high-speed driving
.Idles for long periods in traffic
.Tows a trailer If the overheat warning is displayed
with no sign of steam:
1. Turn the air off.
2. Turn the heater on to the highest
temperature and to the highest
fan speed. Open the windows as
necessary.
3. In heavy traffic, let the engine idle in N (Neutral) while stopped.
If it is safe to do so, pull off
the road, shift to P (Park) or
N (Neutral) and let the
engine idle.
If the temperature overheat gauge
is no longer in the overheat zone or
an overheat warning no longer
displays, the vehicle can be driven.
Continue to drive the vehicle slowly
for about 10 minutes. Keep a safe
vehicle distance from the vehicle in
front. If the warning does not come
back on, continue to drive normally.
If the warning continues, pull over,
stop, and park the vehicle
right away.

Black plate (21,1)Chevrolet Impala Owner Manual - 2011
Vehicle Care 10-21
If there is no sign of steam, idle the
engine for three minutes while
parked. If the warning is still
displayed, turn off the engine until it
cools down. Also, see "Overheated
Engine Protection Operating Mode"
in this section.
Overheated Engine
Protection
Operating Mode
This emergency operating mode
allows the vehicle to be driven
to a safe place in an emergency
situation. If an overheated engine
condition exists, an overheat
protection mode which alternates
firing groups of cylinders helps
prevent engine damage. In this
mode, a significant loss in power
and engine performance will be
noticed. The coolant temperature
gauge will indicate an overheat
condition exists. Driving
extended km (mi) 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, change the oil and
reset the oil life system. See
Engine Oil on page 10‑8.
Power Steering Fluid
The power steering fluid reservoir
is located toward the rear of the
engine compartment on the
passenger side of the vehicle.
See Engine Compartment Overview
on page 10‑6 for reservoir location.
When to Check Power
Steering Fluid
It is not necessary to regularly
check power steering fluid unless
there is a leak suspected in the
system or an unusual noise is
heard. A fluid loss in this system
could indicate a problem. Have the
system inspected and repaired.
How to Check Power
Steering Fluid
To check the power steering fluid,
do the following:
1. Turn the key off and let the
engine compartment cool down.
2. Wipe the cap and the top of the reservoir clean.
3. Unscrew the cap and wipe the dipstick with a clean rag.
4. Replace the cap and completely tighten it.
5. Remove the cap again and look at the fluid level on the dipstick.