Cooling System - Chevrolet Bolt EUV 2023 Owner's Manual

Chevrolet Bolt EUV Owner Manual (GMK-Localizing-MidEast-16409246) -
2023 - CRC - 4/7/22
1. Windshield Washer Fluid Reservoir. See
Washer Fluid 0 214.
2. Cabin Heating Coolant Reservoir. See

Cooling System 0 213.

3. High Voltage Battery Coolant Reservoir.
See Cooling System 0 213.
4. HPDM (High Power Distribution Module).
5. APM (Accessory Power Module), OBCM
(On-Board Charging Module).
6. Brake Fluid Reservoir. See Brake Fluid
0 215.
7. SPIM, APM, and Charger Module Coolant
Reservoir. See Cooling System 0 213.
8. Battery. SeeBattery 0 216.
9. Underhood Compartment Fuse Block.
Underhood Compartment Fuse Block
0 224.
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 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.
Vehicle Care
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 your dealer.
The coolant reservoirs are in the underhood
compartment. See Underhood Compartment
Overview.
213