2021 CHEVROLET BOLT EV coolant

Chevrolet Bolt EV Owner Manual (GMNA-Localizing-U.S./Canada-
14637856) - 2021 - CRC - 10/2/20
14 Keys, Doors, and Windows
Other conditions can affect the performance
of the transmitter. SeeRemote Keyless Entry
(RKE) System 07.
Remote Starting the Vehicle
To remote start the vehicle:
1. Press and release
Qon the RKE
transmitter.
2. Immediately press and hold
/for at
least four seconds or until the turn
signal lamps flash.
3. After entering the vehicle during a remote start, press POWER
Owith the
brake pedal applied to start the vehicle
and operate as normal.
Remote start will automatically shut off
after 20 minutes unless a time extension
is done.
When the vehicle starts, the parking lamps
will turn on. Remote start run time can be
extended.
Extending Vehicle Run Time
The vehicle run time can also be extended
by another 20 minutes, if after 30 seconds
and during the first 20 minutes Steps 1 and
2 are repeated while the vehicle is running.
This provides a total of 40 minutes. The remote start can only be extended once.
A maximum of two remote starts, or a
single start with an extension, are allowed
between ignition cycles using POWER
O.
For additional remote starts, turn the vehicle
on with the transmitter in the vehicle.
Canceling Remote Start
To cancel a remote start, do any of the
following:
.Press and hold/until the parking lamps
turn off.
.Turn on the hazard warning flashers.
.Press POWEROwith the brake pedal
applied, then press POWER
Oagain to
turn the vehicle off.
Conditions in Which Remote Start Will
Not Work
The remote vehicle start feature will not
operate if:
.The RKE transmitter is in the vehicle.
.The ignition is on.
.The hood is not closed.
.The hazard warning flashers are on.
.The electric drive unit coolant
temperature is too high.
.Two remote vehicle starts, or a single
remote start with an extension, have
already been used.
.The vehicle is not in P (Park).
Door Locks
{Warning
Unlocked doors can be dangerous.
.Passengers, especially children, can
easily open the doors and fall out of a
moving vehicle. The doors can be
unlocked and opened while the vehicle
is moving. The chance of being thrown
out of the vehicle in a crash is
increased if the doors are not locked.
So, all passengers should wear seat
belts properly and the doors should be
locked whenever the vehicle is driven.
.Young children who get into unlocked
vehicles may be unable to get out.
A child can be overcome by extreme
heat and can suffer permanent injuries
or even death from heat stroke.
Always lock the vehicle whenever
leaving it. (Continued)

Chevrolet Bolt EV Owner Manual (GMNA-Localizing-U.S./Canada-
14637856) - 2021 - CRC - 10/2/20
Vehicle Care 201
1. Windshield Washer Fluid Reservoir. SeeWasher Fluid 0202.
2. Cabin Heating Coolant Reservoir. See Cooling System 0201.
3. High Voltage Battery Coolant Reservoir. See Cooling System 0201.
4. HPDM (High Power Distribution Module).
5. APM (Accessory Power Module), OBCM (On-Board Charging Module).
6. Brake Fluid Reservoir. See Brake Fluid
0 203.
7. SPIM, APM, and Charger Module Coolant Reservoir. See Cooling System 0201.
8. Battery. See Battery - North America
0 204.
9. Underhood Compartment Fuse Block. Underhood Compartment Fuse Block
0211.
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 0253.
The coolant reservoirs are in the underhood
compartment. See Underhood Compartment
Overview 0200.

Chevrolet Bolt EV Owner Manual (GMNA-Localizing-U.S./Canada-
14637856) - 2021 - CRC - 10/2/20
202 Vehicle Care
1. Cabin Heating Coolant Reservoir
2. High Voltage Battery Coolant Reservoir
3. SPIM, APM, and Charger ModuleCoolant Reservoir
1. Park on a level surface and turn thevehicle 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 0200
for reservoir location.
Caution
.Do not use washer fluid that contains
any type of water repellent coating.
This can cause the wiper blades to
chatter or skip.
(Continued)
Caution (Continued)
.Do not use engine coolant (antifreeze)
in the windshield washer. It can
damage the windshield washer system
and paint.
.Do not mix water with ready-to-use
washer fluid. Water can cause the
solution to freeze and damage the
washer fluid tank and other parts of
the washer system.
.When using concentrated washer fluid,
follow the manufacturer instructions
for adding water.
.Fill the washer fluid tank only
three-quarters full when it is very cold.
This allows for fluid expansion if
freezing occurs, which could damage
the tank if it is completely full.
Brakes
Disc brake linings have built-in wear
indicators that make a high-pitched warning
sound when the brake linings are worn and
new linings are needed. The sound can come
and go or can be heard all the time when
the vehicle is moving, except when applying
the brake pedal firmly.

Chevrolet Bolt EV Owner Manual (GMNA-Localizing-U.S./Canada-
14637856) - 2021 - CRC - 10/2/20
214 Vehicle Care
FusesUsage
51 Electric brake boost
52 –
54 A/C control module
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 Fuses
Usage
71 –
72 Transmission range control
module
73 Single power inverter
module
74 –
Relays Usage
6 Pedestrian friendly alert
function
21 HID lamp
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-
14637856) - 2021 - CRC - 10/2/20
Vehicle Care 219
(1) Passenger (P-Metric) Tire:The
United States version of a metric tire
sizing system. The letter "P" as the first
character in the tire size means a
passenger vehicle tire engineered to
standards set by the U.S. Tire and Rim
Association.
(2) Tire Width
:The 3-digit number
indicates the tire section width in
millimeters from sidewall to sidewall.
(3) Aspect Ratio
:A 2-digit number that
indicates the tire height-to-width
measurements. For example, if the tire
size aspect ratio is 75, as shown in
item (3) of the illustration, it would
mean that the tire's sidewall is
75 percent as high as it is wide.
(4) Construction Code
:A letter code is
used to indicate the type of ply
construction in the tire. The letter "R"
means radial ply construction; the letter
"D" means diagonal or bias ply
construction.
(5) Rim Diameter
:Diameter of the
wheel in inches. (6) Service Description
:These
characters represent the load index and
speed rating of the tire. The load index
represents the load carrying capacity a
tire is certified to carry. The speed
rating is the maximum speed a tire is
certified to carry a load.
Tire Terminology and Definitions
Air Pressure:The amount of air inside
the tire pressing outward on each
square inch of the tire. Air pressure is
expressed in kPa (kilopascal) or psi
(pounds per square inch).
Accessory Weight
:The combined
weight of optional accessories. Some
examples of optional accessories are
automatic transmission, power
windows, power seats, and air
conditioning.
Aspect Ratio
:The relationship of a
tire's height to its width.
Belt
:A rubber coated layer of cords
between the plies and the tread. Cords
may be made from steel or other
reinforcing materials. Bead
:The tire bead contains steel
wires wrapped by steel cords that hold
the tire onto the rim.
Bias Ply Tire
:A pneumatic tire in which
the plies are laid at alternate angles
less than 90 degrees to the centerline
of the tread.
Cold Tire Pressure
:The amount of air
pressure in a tire, measured in kPa
(kilopascal) or psi (pounds per square
inch) before a tire has built up heat
from driving. See Tire Pressure0221.
Curb Weight
:The weight of a motor
vehicle with standard and optional
equipment including the maximum
capacity of fuel, oil, and coolant, but
without passengers and cargo.
DOT Markings
:A code molded into the
sidewall of a tire signifying that the tire
is in compliance with the U.S.
Department of Transportation (DOT)
Motor Vehicle Safety Standards. The
DOT code includes the Tire Identification
Number (TIN), an alphanumeric

Chevrolet Bolt EV Owner Manual (GMNA-Localizing-U.S./Canada-
14637856) - 2021 - CRC - 10/2/20
Service and Maintenance 253
The Additional Required Services are for
vehicles that:
.Carry passengers and cargo within
recommended limits on the Tire and
Loading Information label. SeeVehicle
Load Limits 0153.
.Are driven on reasonable road surfaces
within legal driving limits.
Refer to the information in the Maintenance
Schedule Additional Required Services chart.
{Warning
Performing maintenance work can be
dangerous and can cause serious injury.
Perform maintenance work only if the
required information, proper tools, and
equipment are available. If they are not,
see your dealer to have a trained
technician do the work. See Doing Your
Own Service Work 0198.
Maintenance Schedule
Owner Checks and Services
Once a Month
.Check the tire inflation pressures. See Tire
Pressure 0221.
.Inspect the tires for wear. See Tire
Inspection 0226.
.Check the windshield washer fluid level.
See Washer Fluid 0202.
Air Conditioning Desiccant (Replace Every
Seven Years)
The air conditioning system requires
maintenance every seven years. This service
requires replacement of the desiccant to
help the longevity and efficient operation of
the air conditioning system. This service can
be complex. See your dealer.
Tire Rotation and Required Services
Every 12 000 km/7,500 mi
Rotate the tires, if recommended for the
vehicle, and perform the following services.
See Tire Rotation 0226.
.Check coolant level. See Cooling System
0 201.
.Check windshield washer fluid level. See
Washer Fluid 0202.
.Check tire inflation pressures. See Tire
Pressure 0221.
.Inspect tire wear. See Tire Inspection
0 226.
.Visually check for fluid leaks.
.Inspect brake system. See Exterior Care
0 244.
.Visually inspect steering, suspension, and
chassis components for damage, including
cracks or tears in the rubber boots, loose
or missing parts, or signs of wear at least
once a year. See Exterior Care0244.

Chevrolet Bolt EV Owner Manual (GMNA-Localizing-U.S./Canada-
14637856) - 2021 - CRC - 10/2/20
Service and Maintenance 255
Maintenance Schedule Additional
Required Services12 000 km/7,500 mi
24 000 km/15,000 mi
36 000 km/22,500 mi
48 000 km/30,000 mi 60 000 km/37,500 mi
72 000 km/45,000 mi84 000 km/52,500 mi
96 000 km/60,000 mi
108 000 km/67,500 mi 120 000 km/75,000 mi 132 000 km/82,500 mi
144 000 km/90,000 mi 156 000 km/97,500 mi
168 000 km/105,000 mi 180 000 km/112,500 mi
192 000 km/120,000 mi 204 000 km/127,500 mi 216 000 km/135,000 mi
228 000 km/142,500 mi
240 000 km/150,000 mi
Rotate tires and perform Required Services.@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
Replace passenger compartment air filter. (1)@ @@@@@
Drain and fill vehicle coolant circuits. (2)@
Replace brake fluid. (3)
Replace front and rear wiper blades. (4)
@ @ @ @ @ @ @ @ @ @
Replace hood and/or body lift support gas struts. (5)@ @
Replace air conditioning desiccant. (6)
Footnotes—Maintenance Schedule
Additional Required Services
(1) Or every two years, whichever comes
first. More frequent passenger compartment
air filter replacement may be needed if
driving in areas with heavy traffic, poor air
quality, high dust levels, or environmental
allergens. Passenger compartment air filter
replacement may also be needed if there is
reduced airflow, window fogging, or odors.
Your GM dealer can help determine when to
replace the filter. (2)
Or every five years, whichever comes
first. See Cooling System 0201.
(3) Replace brake fluid every five years. See
Brake Fluid 0203.
(4) Or every 12 months, whichever comes
first. See Wiper Blade Replacement 0206.
(5) Or every 10 years, whichever comes first.
See Gas Strut(s) 0207.
(6) Replace air conditioning desiccant every
seven years.Owner Checks and Services
.At least twice a year, have underbody
flushing service performed. See
"Underbody Maintenance" in Exterior Care
0 244.
Additional Maintenance
and Care
Your vehicle is an important investment and
caring for it properly may help to avoid
future costly repairs. To maintain vehicle
performance, additional maintenance

Chevrolet Bolt EV Owner Manual (GMNA-Localizing-U.S./Canada-
14637856) - 2021 - CRC - 10/2/20
258 Service and Maintenance
Recommended Fluids, Lubricants, and Parts
Recommended Fluids and Lubricants
Fluids and lubricants identified below by name or specification, including fluids or lubricants not listed here, can be obtained from your dealer.Usage Fluid/Lubricant
Electric Drive Unit See your dealer.
Hydraulic Brake System GM approved DOT 4 Hydraulic Brake Fluid.
Key Lock Cylinders, Hood and Liftgate Hinges Multi-Purpose Lubricant, Superlube. See your dealer.
Vehicle Coolant Circuits Use only ACDelco Premix (50/50 mixture of de-ionized water and DEX-COOL Coolant). See your dealer.
Windshield Washer Automotive windshield washer fluid that meets regional freeze protection requirements.