2020 CHEVROLET VOLT heating

Chevrolet BOLT EV Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13556250) - 2020 - CRC - 2/11/20
Driving and Operating 171
Driving Information
Driving for Better Energy
Efficiency
Use the following tips to help
maximize energy efficiency and
range.
In colder temperatures, while these
efficiency tips will help, the electric
vehicle driving range will be lower
due to higher energy usage
including energy spent heating the
cabin.
The Range Impacts screen
estimates the influence of the main
factors impacting vehicle range.
After charging is complete, this
information is reset. See“Range
Impacts” underEnergy Information
0 115.
Acceleration/Braking/Coasting
Avoid rapid accelerations and
decelerations.
Electric range is maximized at
89 km/h (55 mph) and less. Use cruise control when
appropriate.
Plan ahead for decelerations and
coast whenever possible. Do not
rush to traffic signals, and do not
shift to N (Neutral) to coast.
The vehicle recovers more energy
while coasting and braking in
L (Low) than in D (Drive) mode.
Using the steering wheel paddle
during deceleration recovers more
energy. See
Regenerative Braking
0 194.
Terrain and Vehicle Speed
Higher speeds and grade changes
use more energy and can
significantly reduce electric range.
Climate Setting
Using the heat and air conditioning
systems decreases the energy
available for electric driving.
Optimal energy efficiency is
achieved when the heat, air
conditioning, and fan are turned off. Use the heated seat feature instead
of climate control system. Heating
the seat uses less energy than
heating the vehicle interior.
Use remote start to heat or cool the
interior when the vehicle is plugged
in to maximize the electric range by
utilizing electricity from the electrical
outlet.
In hot weather, avoid parking in
direct sunlight or use sunshades
inside the vehicle.
Keep the inside of the windows
clean to reduce fogging, and turn off
the front defroster and rear defogger
when they are not needed.
Avoid driving with the windows open
at highway speeds.
Use the Enhanced Battery Gauge
on the Instrument Cluster to view
the effect of climate control settings
on your estimated range. See
Battery Gauge (High Voltage)
098.
Outside Temperature
On colder days, it is best to plug in
the vehicle overnight, and then
remote start the vehicle.

Chevrolet BOLT EV Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13556250) - 2020 - CRC - 2/11/20
238 Vehicle Care
1. Windshield Washer FluidReservoir. See Washer Fluid
0 239.
2. Cabin Heating Coolant Reservoir. See Cooling System
0 238.
3. High Voltage Battery Coolant Reservoir. See Cooling System
0 238.
4. HPDM (High Power Distribution Module).
5. APM (Accessory Power Module), OBCM (On-Board
Charging Module).
6. Brake Fluid Reservoir. See Brake Fluid 0241.
7. SPIM, APM, and Charger Module Coolant Reservoir. See
Cooling System 0238.
8. Battery. See Battery - North
America 0242.
9. Underhood Compartment Fuse Block. Underhood
Compartment Fuse Block
0 251.Cooling System
It is not necessary to regularly
check coolant unless a leak is
suspected or an unusual noise is
heard. A coolant loss could indicate
a problem. Have it inspected and
repaired by your dealer.
The following explains the cooling
systems and how to check coolant
levels.
.
High Voltage Battery
. Single Power Inverter Module
(SPIM), Accessory Power
Module (APM), and Charger
Module
. Cabin Heating
High Voltage Battery
During vehicle operation and also
during charging, the high voltage
battery cells in the vehicle are kept
within a normal operating
temperature range. If the
temperature rises above this
temperature, the battery cooling
system turns on the air conditioning
compressor and cools the coolant
until the correct temperature is reached. If the temperature falls
below this temperature, a high
voltage heater, located outside the
battery on a cradle, heats the
coolant until the correct temperature
is reached.
Single Power Inverter Module
(SPIM), Accessory Power
Module (APM), and Charger
Module
The SPIM, APM, and charger
module are cooled using a separate
coolant loop. These modules are
kept below a maximum temperature.
If the temperature rises above this
temperature, the electric cooling fan
will turn on to cool the coolant.
Cabin Heating
Cabin heating is maintained by
coolant heated by the Coolant
Heater Control Module (CHCM),
separate from the power electronics
and battery coolant loops. This
module heats the coolant based on
temperature inputs from the cabin
climate control systems.

Chevrolet BOLT EV Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13556250) - 2020 - CRC - 2/11/20
Vehicle Care 239
Hybrid Cooling System
Pressure Caps
The hybrid cooling system
reservoirs have tamper resistant
pressure caps. The coolant should
only be serviced by a qualified
technician.
Checking Coolant
The coolant needs to be replaced at
the appropriate interval. See
Maintenance Schedule0301.
The coolant reservoirs are in the
underhood compartment. See
Underhood Compartment Overview
0 237.
1. Cabin Heating Coolant
Reservoir
2. High Voltage Battery Coolant Reservoir
3. SPIM, APM, and Charger Module Coolant Reservoir
1. Park on a level surface and turn the vehicle off.
2. After the system has completely cooled, check that
the coolant level is at the cold
fill mark on the reservoirs.
3. If the coolant level is not visible or needs to be adjusted within
the reservoirs, contact your
dealer.
Washer Fluid
What to Use
When windshield washer fluid is
needed, be sure to read the
manufacturer's instructions before
use. If operating the vehicle in an
area where the temperature may fall
below freezing, use a fluid that has
sufficient protection against
freezing.
Adding Washer Fluid
Open the cap with the washer
symbol on it. Add washer fluid until
the tank is full. See Underhood
Compartment Overview 0237 for
reservoir location.

Chevrolet BOLT EV Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13556250) - 2020 - CRC - 2/11/20
242 Vehicle Care
Caution
If brake fluid is spilled on the
vehicle's painted surfaces, the
paint finish can be damaged.
Immediately wash off any painted
surface.
Battery - North America
The original equipment battery is
maintenance free. Do not remove
the cap and do not add fluid.
This vehicle has a high voltage
battery and a standard 12-volt
battery.
{Warning
Damage to the high voltage
battery or high voltage system
can create a risk of electric shock,
overheating, or fire.
If the vehicle is damaged from a
moderate to severe crash, flood,
fire, or other event, the vehicle(Continued)
Warning (Continued)
should be inspected as soon as
possible. Until the vehicle has
been inspected, store it outside at
least 15 m (50 ft) from any
structure or anything that can
burn. Ventilate the vehicle by
opening a window or a door.
Contact Customer Assistance as
soon as possible to determine
whether an inspection is needed.
SeeCustomer Assistance Offices
0 314.
If the vehicle is in a crash, the
sensing system may shut down the
high voltage system. When this
occurs, the high voltage battery is
disconnected and the vehicle will
not start. The SERVICE VEHICLE
SOON message in the Driver
Information Center (DIC) will be
displayed. Before the vehicle can be
operated again, it must be serviced
at your dealer. See
“If a Crash Occurs” under
Collision Damage Repair 0319 for
additional information. If an airbag
has inflated, see What Will You See
after an Airbag Inflates? 051.
Only a trained service technician
with the proper knowledge and tools
should inspect, test, or replace the
high voltage battery. See your
dealer if either the 12-volt or high
voltage battery needs service. The
dealer has information on how to
recycle the high voltage battery.
There is also information available
at http://www.recyclemybattery.com.
Keep the vehicle plugged in, even
when fully charged, to keep the high
voltage battery temperature ready
for the next drive. This is important
when outside temperatures are
extremely hot or cold.
Propulsion power may be reduced
in extremely cold temperatures, or if
the high voltage battery is too cold.
BATTERY TOO COLD, PLUG IN
TO WARM will display.

Chevrolet BOLT EV Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13556250) - 2020 - CRC - 2/11/20
256 Vehicle Care
FusesUsage
F29 Trailer interface
module 2
F30 Headlamp leveling
device
F31 OnStar
F32 Virtual keypass
sensor
F33 Heating, ventilation,
and air conditioning
module
F34 Virtual keypass
module
F35 Instrument cluster 1
F36 Radio
F37 –
F38 –
F39 –
F40 – Fuses
Usage
F41 –
F42 –
F43 Body control module 7
F44 Sensing and
diagnostic module
F45 Front camera module
F46 Vehicle integration
control module
F47 Single power inverter
module 2
F48 Electric steering
column lock
F49 Auxiliary jack
F50 Steering wheel
controls
F51 Steering wheel
controls backlighting
F52 Smartphone remote
function module Fuses
Usage
F53 Auxiliary power outlet
F54 –
F55 Logistic
F56 –
F57 –
F59 –
Relays Usage
F58 Logistics relay
F60 Accessory/Retained
accessory power relay

Chevrolet BOLT EV Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13556250) - 2020 - CRC - 2/11/20
Vehicle Care 257
Wheels and Tires
Tires
Every new GM vehicle has
high-quality tires made by a
leading tire manufacturer. See
the warranty manual for
information regarding the tire
warranty and where to get
service. For additional
information refer to the tire
manufacturer.
{Warning
.Poorly maintained and
improperly used tires are
dangerous.
.Overloading the tires can
cause overheating as a
result of too much
flexing. There could be a
blowout and a serious
crash. SeeVehicle Load
Limits 0178.
(Continued)
Warning (Continued)
.Underinflated tires pose
the same danger as
overloaded tires. The
resulting crash could
cause serious injury.
Check all tires frequently
to maintain the
recommended pressure.
Tire pressure should be
checked when the tires
are cold.
.Overinflated tires are
more likely to be cut,
punctured, or broken by
a sudden impact —such
as when hitting a pothole.
Keep tires at the
recommended pressure.
.Worn or old tires can
cause a crash. If the
tread is badly worn,
replace them.
(Continued)
Warning (Continued)
.Replace any tires that
have been damaged by
impacts with potholes,
curbs, etc.
.Improperly repaired tires
can cause a crash. Only
the dealer or an
authorized tire service
center should repair,
replace, dismount, and
mount the tires.
.Do not spin the tires in
excess of 56 km/h
(35 mph) on slippery
surfaces such as snow,
mud, ice, etc. Excessive
spinning may cause the
tires to explode.
All-Season Tires
This vehicle may come with
all-season tires. These tires are
designed to provide good overall
performance on most road surfaces

Chevrolet BOLT EV Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13556250) - 2020 - CRC - 2/11/20
Vehicle Care 263
government testing procedures.
The ratings are molded into the
sidewall of the tire. SeeUniform
Tire Quality Grading 0273.
Vehicle Capacity Weight
:The
number of designated seating
positions multiplied by
68 kg (150 lbs) plus the rated
cargo load. See Vehicle Load
Limits 0178.
Vehicle Maximum Load on the
Tire
:Load on an individual tire
due to curb weight, accessory
weight, occupant weight, and
cargo weight.
Vehicle Placard
:A label
permanently attached to a
vehicle showing the vehicle's
capacity weight and the original
equipment tire size and
recommended inflation pressure.
See “Tire and Loading
Information Label” underVehicle
Load Limits 0178.
Tire Pressure
Tires need the correct amount of
air pressure to operate
effectively.
{Warning
Neither tire underinflation nor
overinflation is good.
Underinflated tires, or tires
that do not have enough air,
can result in:
.Tire overloading and
overheating which could
lead to a blowout.
.Premature or
irregular wear.
.Poor handling.
.Reduced battery-electric
range.
Overinflated tires, or tires that
have too much air, can
result in:
(Continued)
Warning (Continued)
.Unusual wear.
.Poor handling.
.Rough ride.
.Needless damage from
road hazards.
The Tire and Loading
Information label on the vehicle
indicates the original equipment
tires and the correct cold tire
inflation pressures. The
recommended pressure is the
minimum air pressure needed to
support the vehicle's maximum
load carrying capacity. See
Vehicle Load Limits 0178.
How the vehicle is loaded
affects vehicle handling and ride
comfort. Never load the vehicle
with more weight than it was
designed to carry.

Chevrolet BOLT EV Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13556250) - 2020 - CRC - 2/11/20
Index 339
Gauges (cont'd)Driver Efficiency . . . . . . . . . . . . . . . . 98
Odometer . . . . . . . . . . . . . . . . . . . . . . . 97
Power Indicator . . . . . . . . . . . . . . . . . 99
Speedometer . . . . . . . . . . . . . . . . . . . 97
Trip Odometer . . . . . . . . . . . . . . . . . . 97
Warning Lights and
Indicators . . . . . . . . . . . . . . . . . . . . . 94
General Information Service and Maintenance . . . . . 300
Towing . . . . . . . . . . . . . . . . . . . . . . . . 230
Vehicle Care . . . . . . . . . . . . . . . . . . 233
GM Mobility Reimbursement Program . . . . . . . . . . . . . . . . . . . . . . . 316
H
Halogen Bulbs . . . . . . . . . . . . . . . . . . 247
Hands-Free Phone . . . . . . . . . . . . . 155
Hazard Warning Flashers . . . . . . . 131
Head Restraints . . . . . . . . . . . . . . . . . 32
HeadlampsAiming . . . . . . . . . . . . . . . . . . . . . . . . 247
Automatic . . . . . . . . . . . . . . . . . . . . . 131
Bulb Replacement . . . . . . . . . . . . 247
Daytime RunningLamps (DRL) . . . . . . . . . . . . . . . . 130
Flash-to-Pass . . . . . . . . . . . . . . . . . 130 Headlamps (cont'd)
High Intensity Discharge
(HID) Lighting . . . . . . . . . . . . . . . 248
High-Beam On Light . . . . . . . . . . 106
High/Low Beam Changer . . . . . 130
Lamps On Reminder . . . . . . . . . 106
Heated
Rear Seats . . . . . . . . . . . . . . . . . . . . . 39
Steering Wheel . . . . . . . . . . . . . . . . . 86
Heated Front Seats . . . . . . . . . . . . . . 35
Heated Mirrors . . . . . . . . . . . . . . . . . . . 25
Heating . . . . . . . . . . . . . . . . . . . . . . . . . 163
High Voltage Battery Gauge . . . . . 98
High Voltage Devices and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . 249
High-Beam On Light . . . . . . . . . . . . 106
Hill and Mountain Roads . . . . . . . . 176
Hill Start Assist (HSA) . . . . . . . . . . 193
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . 235
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
How to Wear Seat Belts
Properly . . . . . . . . . . . . . . . . . . . . . . . . 40
HVAC . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
I
Immobilizer . . . . . . . . . . . . . . . . . . . . . . 22
Indicator Pedestrian Ahead . . . . . . . . . . . . 104 Indicator (cont'd)
Vehicle Ahead . . . . . . . . . . . . . . . . 104
Infants and Young Children, Restraints . . . . . . . . . . . . . . . . . . . . . . 61
Information Energy . . . . . . . . . . . . . . . . . . . . . . . .115
Publication Ordering . . . . . . . . . . 321
Instrument Cluster . . . . . . . . . . . . . . . 94
Instrument Panel Storage Area . . . . . . . . . . . . . . . . . . . 81
Instrument Panel Overview . . . . . . . 5
Interior Rearview Mirrors . . . . . . . . . 25
Introduction . . . . . . . . . . . . . . . . . . 2, 135
J
Jump Starting - North America . . . . . . . . . . . . . . . . . . . . . . . 284
K
Keyless Entry
Remote (RKE) System . . . . . . . . . . 8
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
L
Labeling, Tire Sidewall . . . . . . . . . . 259
Lamps
Courtesy . . . . . . . . . . . . . . . . . . . . . . 132
Daytime Running (DRL) . . . . . . 130
Dome . . . . . . . . . . . . . . . . . . . . . . . . . 133