2019 CHEVROLET IMPALA cooling

Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-12146115) -
2019 - crc - 8/27/18
18 In Brief
Climate Controls
The heating, cooling, and ventilation for the vehicle can be controlled with
these systems.
Climate Control System
1. Fan Control
2. Air Conditioning or Comfort/ Eco Air Conditioning (Stop/
Start Only)
3. Air Delivery Modes 4. Defrost
5. TEMP (Temperature Control)
6. Rear Window Defogger
7. Recirculation

Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-12146115) -
2019 - crc - 8/27/18
Lighting 149
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 028. 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 0132.
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
0132.
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-12146115) -
2019 - crc - 8/27/18
152 Climate Controls
Climate Controls
Climate Control Systems
Climate Control Systems . . . . . 152
Dual Automatic ClimateControl System . . . . . . . . . . . . . 155
Air Vents
Air Vents . . . . . . . . . . . . . . . . . . . . . 159
Maintenance
Passenger Compartment AirFilter . . . . . . . . . . . . . . . . . . . . . . . . 160
Service . . . . . . . . . . . . . . . . . . . . . . . 160
Climate Control Systems
The heating, cooling, and ventilation for the vehicle can be controlled with
this system.
1. Fan Control
2. Air Conditioning or Comfort/
Eco Air Conditioning (Stop/
Start Only)
3. Air Delivery Modes
4. Defrost
5. TEMP (Temperature Control)
6. Rear Window Defogger
7. Recirculation Climate Control Influence on Stop/
Start Operation and Fuel Economy
(If Equipped)
The climate control system is
dependent upon other vehicle
systems for heat and power input.
Certain climate control settings can
lead to higher fuel usage and/or
fewer Auto Stops.

Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-12146115) -
2019 - crc - 8/27/18
Climate Controls 155
Dual Automatic Climate Control System
The heating, cooling, and ventilation for the vehicle can be controlled with
this system.
1. Driver and PassengerTemperature Controls
2. Air Conditioning or Comfort/ Eco Air Conditioning (Stop/
Start Only)
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) Climate Control Influence on Stop/
Start Operation and Fuel Economy
(If Equipped)
The climate control system is
dependent upon other vehicle
systems for heat and power input.
Certain climate control settings can
lead to higher fuel usage and/or
fewer Auto Stops.
The following climate control
settings use more fuel:
.
Comfort air conditioning mode
. Defrost mode
. Extreme temperature settings,
such as 15 °C (60 °F) or 32 °C
(90 °F)
. High fan speed settings
To help reduce fuel usage:
. Use the full automatic control as
described under “Automatic
Operation.”
. Use eco air conditioning, instead
of the comfort air conditioning.
. Select a temperature setting that
is higher in hot weather and
lower in cold weather.

Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-12146115) -
2019 - crc - 8/27/18
166 Driving and Operating
Warning (Continued)
Flowing or rushing water creates
strong forces. Driving through
flowing water could cause the
vehicle to be carried away. If this
happens, you and other vehicle
occupants could drown. Do not
ignore police warnings and be
very cautious about trying to drive
through flowing water.
Hydroplaning
Hydroplaning is dangerous. Water
can build up under the vehicle's
tires so they actually ride on the
water. This can happen if the road is
wet enough and you are going fast
enough. When the vehicle is
hydroplaning, it has little or no
contact with the road.
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 Tires0256.
. 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.

Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-12146115) -
2019 - crc - 8/27/18
216 Driving and Operating
3. Drive slowly until the trailer isclear 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 0301. 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
0 237.
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:
.
fully loaded vehicle and trailer
combination
. the trailer
. the trailer tongue
{Warning
You and others could be seriously
injured or killed if the trailer is too
heavy or the trailer brakes are
inadequate for the load. The
vehicle may be damaged, and the
repairs would not be covered by
the vehicle warranty.
Only tow a trailer if all the steps in
this section have been followed.
Ask your dealer for advice and
information about towing a trailer.
Gross Vehicle Weight
Rating (GVWR)
For information about the vehicle's
maximum load capacity, see Vehicle
Load Limits 0168. When calculating
the GVWR with a trailer attached,

Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-12146115) -
2019 - crc - 8/27/18
Vehicle Care 221
Vehicle Care
General Information
General Information . . . . . . . . . . 222
California Proposition65 Warning . . . . . . . . . . . . . . . . . 222
California Perchlorate Materials Requirements . . . . . 223
Accessories and Modifications . . . . . . . . . . . . . . . . 223
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . 223
Hood . . . . . . . . . . . . . . . . . . . . . . . . . 224
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . . 225
Engine Oil . . . . . . . . . . . . . . . . . . . . 228
Engine Oil Life System . . . . . . . 230
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . . . 231
Engine Air Cleaner/Filter . . . . . . 232
Cooling System . . . . . . . . . . . . . . 233
Engine Overheating . . . . . . . . . . 237
Overheated Engine Protection Operating Mode . . . . . . . . . . . . . 238
Washer Fluid . . . . . . . . . . . . . . . . . 238
Brakes . . . . . . . . . . . . . . . . . . . . . . . 239
Brake Fluid . . . . . . . . . . . . . . . . . . . 240 Battery - North America . . . . . . 241
Starter Switch Check . . . . . . . . . 242
Automatic Transmission Shift
Lock Control Function
Check . . . . . . . . . . . . . . . . . . . . . . . 243
Park Brake and P (Park) Mechanism Check . . . . . . . . . . 243
Wiper Blade Replacement . . . . 243
Windshield Replacement . . . . . 244
Gas Strut(s) . . . . . . . . . . . . . . . . . . 244
Headlamp Aiming
Headlamp Aiming . . . . . . . . . . . . 246
Bulb Replacement
Bulb Replacement . . . . . . . . . . . . 246
Halogen Bulbs . . . . . . . . . . . . . . . . 246
High Intensity Discharge (HID) Lighting . . . . . . . . . . . . . . . . . . . . . 246
LED Lighting . . . . . . . . . . . . . . . . . 246
Headlamps, Front Turn Signal, Sidemarker, and Parking
Lamps . . . . . . . . . . . . . . . . . . . . . . 247
Taillamps, Turn Signal, Stoplamps, and Back-Up
Lamps . . . . . . . . . . . . . . . . . . . . . . 248
License Plate Lamp . . . . . . . . . . 249
Electrical System
High Voltage Devices and Wiring . . . . . . . . . . . . . . . . . . . . . . . 250 Electrical System Overload . . . 250
Fuses and Circuit Breakers . . . 251
Engine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 251
Instrument Panel Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 254
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 256
All-Season Tires . . . . . . . . . . . . . . 257
Winter Tires . . . . . . . . . . . . . . . . . . 258
Low-Profile Tires . . . . . . . . . . . . . 258
Summer Tires . . . . . . . . . . . . . . . . 258
Tire Sidewall Labeling . . . . . . . . 259
Tire Designations . . . . . . . . . . . . . 261
Tire Terminology andDefinitions . . . . . . . . . . . . . . . . . . 262
Tire Pressure . . . . . . . . . . . . . . . . . 264
Tire Pressure for High-Speed Operation . . . . . . . . . . . . . . . . . . . 266
Tire Pressure Monitor System . . . . . . . . . . . . . . . . . . . . . . 266
Tire Pressure Monitor Operation . . . . . . . . . . . . . . . . . . . 267
Tire Inspection . . . . . . . . . . . . . . . . 270
Tire Rotation . . . . . . . . . . . . . . . . . 270
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . 271
Buying New Tires . . . . . . . . . . . . . 272
Different Size Tires and Wheels . . . . . . . . . . . . . . . . . . . . . . 273

Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-12146115) -
2019 - crc - 8/27/18
226 Vehicle Care
1.Engine Air Cleaner/Filter 0232.
2. Engine Cover.
3. Engine Oil Fill Cap. See Engine Oil 0228.
4. Engine Oil Dipstick. See Engine Oil 0228.
5. Engine Cooling Fans (Out of View). See Cooling System
0 233.
6. Transmission Fluid Cap. See Automatic Transmission Fluid
0231.
7. Brake Fluid Reservoir. See Brake Fluid 0240.
8. Coolant Surge Tank and Pressure Cap. See Cooling
System 0233.
9. Battery (Under Cover). See Battery - North America 0241.
10. Windshield Washer Fluid Reservoir. See Washer Fluid
0 238.
11. Engine Compartment Fuse
Block 0251.