2020 CHEVROLET IMPALA cooling

Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-13688912) -
2020 - CRC - 6/5/19
130 Lighting
Lighting Features
Entry Lighting
Some exterior lamps and most of
the interior lamps turn on briefly at
night or in areas with limited lighting
when the Remote Keyless Entry
(RKE) transmitter
Kbutton is
pressed. See Remote Keyless Entry
(RKE) System Operation 08. After
about 30 seconds the exterior lamps
turn off, then the dome lamps and
remaining interior lamps dim to off.
Entry lighting can be disabled
manually by turning the ignition on
or to ACC/ACCESSORY, or by
pressing
Qon the RKE transmitter.
This feature can be changed. See
Vehicle Personalization 0113.
Exit Lighting
Some exterior lamps and interior
lights come on at night, or in areas
with limited lighting, when the driver
door is opened after the ignition is
turned off. The dome lamp comes
on after the ignition is turned off. The exterior lamps and dome lamp
remain on for a set amount of time,
then automatically turn off.
The exterior lamps turn off
immediately by turning the exterior
lamp control off.
This feature can be changed. See
Vehicle Personalization
0113.
Battery Load
Management
The vehicle has Electric Power
Management (EPM) that estimates
the battery's temperature and state
of charge. It then adjusts the voltage
for best performance and extended
life of the battery.
When the battery's state of charge
is low, the voltage is raised slightly
to quickly bring the charge back up.
When the state of charge is high,
the voltage is lowered slightly to
prevent overcharging. If the vehicle
has a voltmeter gauge or a voltage
display on the Driver Information
Center (DIC), you may see the voltage move up or down. This is
normal. If there is a problem, an
alert will be displayed.
The battery can be discharged at
idle if the electrical loads are very
high. This is true for all vehicles.
This is because the generator
(alternator) may not be spinning fast
enough at idle to produce all of the
power needed for very high
electrical loads.
A high electrical load occurs when
several of the following are on, such
as: headlamps, high beams, rear
window defogger, climate control fan
at high speed, heated seats, engine
cooling fans, trailer loads, and loads
plugged into accessory power
outlets.
EPM works to prevent excessive
discharge of the battery. It does this
by balancing the generator's output
and the vehicle's electrical needs.
It can increase engine idle speed to
generate more power whenever
needed. It can temporarily reduce
the power demands of some
accessories.

Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-13688912) -
2020 - CRC - 6/5/19
Climate Controls 133
Climate Controls
Climate Control Systems
Dual Automatic ClimateControl System . . . . . . . . . . . . . 133
Air Vents
Air Vents . . . . . . . . . . . . . . . . . . . . . 137
Maintenance
Passenger Compartment AirFilter . . . . . . . . . . . . . . . . . . . . . . . . 138
Service . . . . . . . . . . . . . . . . . . . . . . . 138
Climate Control Systems
Dual Automatic Climate Control System
The heating, cooling, and ventilation for the vehicle can be controlled with
this system.
1. Driver and Passenger
Temperature Controls
2. Air Conditioning or Comfort/ Eco Air Conditioning
3. Fan Control
4. Defrost
5. SYNC 6. Rear Window Defogger
7. Air Delivery Modes
8.
O(Fan On/Off)
9. Recirculation
10. AUTO (Automatic Operation)

Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-13688912) -
2020 - CRC - 6/11/19
Driving and Operating 145
There is no hard and fast rule about
hydroplaning. The best advice is to
slow down when the road is wet.
Other Rainy Weather Tips
Besides slowing down, other wet
weather driving tips include:
.Allow extra following distance.
. Pass with caution.
. Keep windshield wiping
equipment in good shape.
. Keep the windshield washer fluid
reservoir filled.
. Have good tires with proper
tread depth. See Tires0231.
. Turn off cruise control.
Hill and Mountain Roads
Driving on steep hills or through
mountains is different than driving
on flat or rolling terrain. Tips include:
.
Keep the vehicle serviced and in
good shape.
. Check all fluid levels and brakes,
tires, cooling system, and
transmission. .
Shift to a lower gear when going
down steep or long hills.
{Warning
Using the brakes to slow the
vehicle on a long downhill slope
can cause brake overheating, can
reduce brake performance, and
could result in a loss of braking.
Shift the transmission to a lower
gear to let the engine assist the
brakes on a steep downhill slope.
{Warning
Coasting downhill in N (Neutral)
or with the ignition off is
dangerous. This can cause
overheating of the brakes and
loss of steering assist. Always
have the engine running and the
vehicle in gear. .
Drive at speeds that keep the
vehicle in its own lane. Do not
swing wide or cross the
center line.
. Be alert on top of hills;
something could be in your lane
(e.g., stalled car, crash).
. Pay attention to special road
signs (e.g., falling rocks area,
winding roads, long grades,
passing or no-passing zones)
and take appropriate action.
Winter Driving
Driving on Snow or Ice
Snow or ice between the tires and
the road creates less traction or
grip, so drive carefully. Wet ice can
occur at about 0 °C (32 °F) when
freezing rain begins to fall. Avoid
driving on wet ice or in freezing rain
until roads can be treated.
For Slippery Road Driving:
.Accelerate gently. Accelerating
too quickly causes the wheels to
spin and makes the surface
under the tires slick.

Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-13688912) -
2020 - CRC - 6/11/19
Driving and Operating 193
When parking your vehicle and your
trailer on a hill:1. Press the brake pedal, but do not shift into P (Park) yet. Turn
the wheels into the curb if
facing downhill or into traffic if
facing uphill.
2. Have someone place chocks under the trailer wheels.
3. When the wheel chocks are in place, gradually release the
brake pedal to allow the chocks
to absorb the load of the trailer.
4. Reapply the brake pedal. Then apply the parking brake and
shift into P (Park).
5. Release the brake pedal.
Leaving After Parking on a Hill
1. Apply and hold the brake pedal.
.Start the engine.
. Shift into a gear.
. Release the parking brake.
2. Let up on the brake pedal. 3. Drive slowly until the trailer is
clear of the chocks.
4. Stop and have someone pick up and store the chocks.
Maintenance when Trailer
Towing
The vehicle needs service more
often when used to tow trailers. See
Maintenance Schedule 0276. It is
especially important to check the
automatic transmission fluid, engine
oil, axle lubricant, belts, cooling
system, and brake system before
and during each trip.
Check periodically that all nuts and
bolts on the trailer hitch are tight.
Engine Cooling when Trailer
Towing
The cooling system may temporarily
overheat during severe operating
conditions. See Engine Overheating
0 212.
Trailer Towing
Caution
Towing a trailer improperly can
damage the vehicle and result in
costly repairs not covered by the
vehicle warranty. To tow a trailer
correctly, follow the directions in
this section and see your dealer
for important information about
towing a trailer with the vehicle.
Trailer Weight
{Warning
Never exceed the towing capacity
for your vehicle.
Safe trailering requires monitoring
the weight, speed, altitude, road
grades, outside temperature,
dimensions of the front of the trailer,
and how frequently the vehicle is
used to tow a trailer.
Before towing a trailer, always
separately weigh:

Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-13688912) -
2020 - CRC - 6/5/19
198 Vehicle Care
Vehicle Care
General Information
General Information . . . . . . . . . . 199
California Proposition65 Warning . . . . . . . . . . . . . . . . . 199
California Perchlorate Materials Requirements . . . . . 200
Accessories and Modifications . . . . . . . . . . . . . . . . 200
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . 200
Hood . . . . . . . . . . . . . . . . . . . . . . . . . 201
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . . 203
Engine Oil . . . . . . . . . . . . . . . . . . . . 204
Engine Oil Life System . . . . . . . 206
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . . . 207
Engine Air Cleaner/Filter . . . . . . 208
Cooling System . . . . . . . . . . . . . . 209
Engine Overheating . . . . . . . . . . 212
Overheated Engine Protection Operating Mode . . . . . . . . . . . . . 213
Washer Fluid . . . . . . . . . . . . . . . . . 214
Brakes . . . . . . . . . . . . . . . . . . . . . . . 214
Brake Fluid . . . . . . . . . . . . . . . . . . . 215 Battery - North America . . . . . . 216
Starter Switch Check . . . . . . . . . 217
Automatic Transmission Shift
Lock Control Function
Check . . . . . . . . . . . . . . . . . . . . . . . 217
Park Brake and P (Park) Mechanism Check . . . . . . . . . . 218
Wiper Blade Replacement . . . . 218
Windshield Replacement . . . . . 219
Gas Strut(s) . . . . . . . . . . . . . . . . . . 219
Headlamp Aiming
Front Headlamp Aiming . . . . . . 220
Bulb Replacement
Bulb Replacement . . . . . . . . . . . . 221
Halogen Bulbs . . . . . . . . . . . . . . . . 221
High Intensity Discharge (HID) Lighting . . . . . . . . . . . . . . . . . . . . . 221
LED Lighting . . . . . . . . . . . . . . . . . 221
Headlamps, Front Turn Signal, Sidemarker, and Parking
Lamps . . . . . . . . . . . . . . . . . . . . . . 221
Taillamps, Turn Signal, Stoplamps, and Back-Up
Lamps . . . . . . . . . . . . . . . . . . . . . . 223
License Plate Lamp . . . . . . . . . . 224
Electrical System
High Voltage Devices and Wiring . . . . . . . . . . . . . . . . . . . . . . . 225 Electrical System Overload . . . 225
Fuses and Circuit Breakers . . . 226
Engine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 226
Instrument Panel Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 229
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 231
All-Season Tires . . . . . . . . . . . . . . 232
Winter Tires . . . . . . . . . . . . . . . . . . 233
Low-Profile Tires . . . . . . . . . . . . . 233
Summer Tires . . . . . . . . . . . . . . . . 233
Tire Sidewall Labeling . . . . . . . . 234
Tire Designations . . . . . . . . . . . . . 236
Tire Terminology andDefinitions . . . . . . . . . . . . . . . . . . 237
Tire Pressure . . . . . . . . . . . . . . . . . 239
Tire Pressure for High-Speed Operation . . . . . . . . . . . . . . . . . . . 240
Tire Pressure Monitor System . . . . . . . . . . . . . . . . . . . . . . 241
Tire Pressure Monitor Operation . . . . . . . . . . . . . . . . . . . 242
Tire Inspection . . . . . . . . . . . . . . . . 245
Tire Rotation . . . . . . . . . . . . . . . . . 245
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . 246
Buying New Tires . . . . . . . . . . . . . 247
Different Size Tires and Wheels . . . . . . . . . . . . . . . . . . . . . . 249

Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-13688912) -
2020 - CRC - 6/5/19
204 Vehicle Care
1.Engine Air Cleaner/Filter 0208.
2. Engine Oil Fill Cap. See Engine Oil 0204.
3. Engine Oil Dipstick. See Engine Oil 0204.
4. Engine Cooling Fans (Out of View). See Cooling System
0 209.
5. Engine Cover.
6. Transmission Fluid Cap and Dipstick (Out of View). See
Automatic Transmission Fluid
0207.
7. Brake Fluid Reservoir. See Brake Fluid 0215.
8. Coolant Surge Tank and Pressure Cap. See Cooling
System 0209.
9. Battery - North America 0216.
10. Windshield Washer Fluid Reservoir. See Washer Fluid
0 214.
11. Engine Compartment Fuse
Block 0226.Engine Oil
To ensure proper engine
performance and long life, careful
attention must be paid to engine oil.
Following these simple, but
important steps will help protect
your investment:
.
Use engine oil approved to the
proper specification and of the
proper viscosity grade. See
“Selecting the Right Engine Oil”
in this section.
. Check the engine oil level
regularly and maintain the
proper oil level. See “Checking
Engine Oil” and“When to Add
Engine Oil” in this section.
. Change the engine oil at the
appropriate time. See Engine Oil
Life System 0206.
. Always dispose of engine oil
properly. See “What to Do with
Used Oil” in this section.
Checking Engine Oil
Check the engine oil level regularly,
every 650 km (400 mi), especially
prior to a long trip. The engine oil
dipstick handle is a loop. See
Engine Compartment Overview
0203 for the location.
{Warning
The engine oil dipstick handle
may be hot; it could burn you.
Use a towel or glove to touch the
dipstick handle.
If a low oil Driver Information Center
(DIC) message displays, check the
oil level.
Follow these guidelines:
. To get an accurate reading, park
the vehicle on level ground.
Check the engine oil level after
the engine has been off for at
least two hours. Checking the
engine oil level on steep grades
or too soon after engine shutoff
can result in incorrect readings.
Accuracy improves when

Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-13688912) -
2020 - CRC - 6/5/19
Vehicle Care 209
4. Disconnect the electricalconnector (3).
5. Disconnect the outlet duct by loosening the air duct
clamp (4).
6. Lift the filter cover housing away from the engine air
cleaner/filter housing.
7. Pull out the filter.
8. Inspect or replace the engine air cleaner/filter.
9. Reverse Steps 2–5 to reinstall the filter cover housing.
{Warning
Operating the engine with the air
cleaner/filter off can cause you or
others to be burned. Use caution
when working on the engine. Do
not start the engine or drive the
vehicle with the air cleaner/filter
off, as flames may be present if
the engine backfires.
Caution
If the air cleaner/filter is off, dirt
can easily get into the engine,
which could damage it. Always
have the air cleaner/filter in place
when driving.
Cooling System
The cooling system allows the
engine to maintain the correct
working temperature.
1. Engine Cooling Fans (Out
of View) 2. Coolant Surge Tank and
Pressure Cap
{Warning
An underhood electric fan 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
Do not touch heater or radiator
hoses, or other engine parts.
They can be very hot and can
burn you. Do not run the engine if
there is a leak; all coolant could
leak out. That could cause an
engine fire and can burn you. Fix
any leak before driving the
vehicle.

Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-13688912) -
2020 - CRC - 6/5/19
210 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,
seeEngine Overheating 0212.
What to Use
{Warning
Plain water, or other liquids such
as alcohol, can boil before the
proper coolant mixture will. With
plain water or the wrong mixture,
the engine could get too hot but
there would not be an 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. If using this mixture,
nothing else needs to be added.
This mixture:
.
Gives freezing protection down
to−37 °C (−34 °F), outside
temperature.
. Gives boiling protection up to
129 °C (265 °F), engine
temperature.
. Protects against rust and
corrosion.
. Will not damage aluminum parts.
. Help keep the proper engine
temperature.
Caution
Do not use anything other than a
mix of DEX-COOL coolant that
meets GM Standard
GMW3420 and clean, drinkable
water. Anything else can cause
damage to the engine cooling
(Continued)
Caution (Continued)
system and the vehicle, which
would not be covered by the
vehicle warranty.
Never dispose of engine coolant by
putting it in the trash, pouring it on
the ground, or into sewers, streams,
or bodies of water. Have the coolant
changed by an authorized service
center, familiar with legal
requirements regarding used
coolant disposal. This will help
protect the environment and your
health.
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 surge tank. If the coolant
inside the coolant surge tank is
boiling, do not do anything else until
it cools down.