2023 CHEVROLET BOLT EV heater

Chevrolet BOLT EV Owner Manual (GMNA-Localizing-U.S./Canada-
16404388) - 2023 - CRC - 3/7/22
146 Climate Controls
return to automatic operation. PressON/OFF
to turn off the fan and the climate control
system.
Q/R: Press to increase or decrease the
temperature.Press and hold to rapidly
increase or decrease the temperature.
The temperatures can also be adjusted by
touching the buttons on the climate control
display.
Air Delivery Mode Control : When the
climate information is displayed, touch the
desired air delivery mode on the climate
control display to change the direction of
the airflow. The selected air delivery mode
button is lit. Touching any of the air
delivery buttons cancels automatic air
delivery control and the direction of the
airflow can be controlled manually. Press
AUTO to return to automatic operation.
To change the current mode, select one of
the following:
Y: Air is directed to the instrument panel
outlets.
\: Air is divided between the instrument
panel outlets and the floor outlets.
[: Air is directed to the floor outlets.
-:Clears the windows of fog or moisture.
Air is directed to the windshield and floor
outlets.
1MAX : Air is directed to the windshield
and the fan runs at a higher speed. Fog or
frost is cleared from the windshield more
quickly. When the button is pressed again,
the system returns to the previous mode
setting. For best results, clear all snow and
ice from the windshield before defrosting.
A/C : Press A/C Mode on the climate control
display to turn the automatic air
conditioning on or off. If the fan is turned
off or the outside temperature falls below
freezing, the air conditioner will not run.
Press AUTO to return to automatic operation
and the air conditioner runs as needed.
Automatic Air Recirculation : When the
AUTO indicator light is on, the air is
automatically recirculated as needed to help
quickly cool the inside of the vehicle.
L: Press to turn on recirculation. Using
air conditioning and recirculation together
for long periods of time may cause the air
inside the vehicle to become too dry. To
prevent this from happening, after the air in
the vehicle has cooled, turn the recirculation
mode off. Pressing this button cancels automatic
recirculation. Press AUTO to return to
automatic operation; recirculation runs
automatically as needed. Manual
recirculation mode is not recommended
when in Defrost or Defog modes.
HEAT :
Press to turn the heater on when the
fan is on.
A/C : Press to turn the air conditioning on
when the fan is on.
Auto Defog : The system will monitor high
humidity inside the vehicle. When high
humidity is detected, the climate control
system may adjust to outside air supply and
turn on the air conditioner or the heater.
The fan speed may slightly increase to help
prevent fogging. When high humidity is no
longer detected, the system will return to
its prior operation. To turn Auto Defog off
or on, select Settings > Climate and Air
Quality > Auto Defog > Select ON or OFF.Rear Window Defogger
K: Press to turn the rear window defogger
on or off. An indicator light on the button
comes on to show that the rear window
defogger is on.

Chevrolet BOLT EV Owner Manual (GMNA-Localizing-U.S./Canada-
16404388) - 2023 - CRC - 3/7/22
Vehicle Care 217
1. Windshield Washer Fluid Reservoir. SeeWasher Fluid 0218.
2. Cabin Heating Coolant Reservoir. See Cooling System 0217.
3. High Voltage Battery Coolant Reservoir. See Cooling System 0217.
4. HPDM (High Power Distribution Module).
5. APM (Accessory Power Module), OBCM (On-Board Charging Module).
6. Brake Fluid Reservoir. See Brake Fluid
0 219.
7. SPIM, APM, and Charger Module Coolant Reservoir. See Cooling System 0217.
8. Battery. See Battery - North America
0 220.
9. Underhood Compartment Fuse Block. Underhood Compartment Fuse Block
0229.
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.
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
Schedule 0271.
The coolant reservoirs are in the underhood
compartment. See Underhood Compartment
Overview 0216.

Chevrolet BOLT EV Owner Manual (GMNA-Localizing-U.S./Canada-
16404388) - 2023 - CRC - 3/7/22
232 Vehicle Care
FusesUsage
55 Rechargeable Energy
Storage System
Coolant Pump
56 –
57 Power Electronics
Coolant Pump
58 Engine Control Module
59 –
60 HVAC Electric Heater 61 On-board Charging Module
62 Transmission Range Control
Module 1
63 Electric Cooling Fan
64 Engine Control Module 65 Auxiliary Heater Pump
66 Powertrain 67 Drive Unit Controller
70 A/C Control Module 71 –
72 Transmission Range Control
Module Fuses
Usage
73 Single Power Inverter
Module
74 –
Relays Usage
6 Pedestrian Friendly Alert
Function
14 Liftgate 21 –
25 Powertrain
53 Run/Crank
68 Rear Window Defogger
69 Second Run/CrankInstrument Panel Fuse Block

Chevrolet BOLT EV Owner Manual (GMNA-Localizing-U.S./Canada-
16404388) - 2023 - CRC - 3/7/22
Technical Data 277
Vehicle Data
Capacities and Specifications
The following approximate capacities are given in metric and English conversions.
Refer toRecommended Fluids and Lubricants 0273 for more information.
Application Capacities Metric English
Air Conditioning Refrigerant For the air conditioning system refrigerant charge type and
amount, see the refrigerant label under the hood. See your dealer for more information.
Cooling Systems*
IHigh Voltage Battery 7.0 L 7.4 qt
IPower Electronics 3.8 L 4.0 qt
IHeater 2.0 L
2.1 qt
Wheel Nut Torque 140Y 100 lb ft
All capacities are approximate. When adding, be sure to fill to the approximate level, as recommended in this manual. Recheck fluid level
after filling.
*Cooling systems capacity values are based on the individual cooling system and its components.