2021 CHEVROLET BOLT EV engine

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
256 Service and Maintenance
services may be required. It is recommended
that your dealer perform these services—
their trained dealer technicians know your
vehicle best. Your dealer can also perform a
thorough assessment with a multi-point
inspection to recommend when your vehicle
may need attention. The following list is
intended to explain the services and
conditions to look for that may indicate
services are required.
Battery
The battery supplies power to operate any
additional electrical accessories.
.To avoid break-down or failure, maintain
a battery with full power.
.Trained dealer technicians have the
diagnostic equipment to test the battery
and ensure that the connections and
cables are corrosion-free.
Brakes
Brakes stop the vehicle and are crucial to
safe driving.
.Signs of brake wear may include chirping,
grinding, or squealing noises, or difficulty
stopping.
.Trained dealer technicians have access to
tools and equipment to inspect the brakes
and recommend quality parts engineered
for the vehicle.
Fluids
Proper fluid levels and approved fluids
protect the vehicle’s systems and
components. See Recommended Fluids and
Lubricants 0258 for GM approved fluids.
.Keep the windshield washer fluid reservoir
filled.
.Instrument cluster lights may come on to
indicate that fluids may be low and need
to be filled.
Hoses
Hoses transport fluids and should be
regularly inspected to ensure that there are
no cracks or leaks. With a multi-point
inspection, your dealer can inspect the hoses
and advise if replacement is needed. Lamps
Properly working headlamps, taillamps, and
brake lamps are important to see and be
seen on the road.
.Signs that the headlamps need attention
include dimming, failure to light, cracking,
or damage. The brake lamps need to be
checked periodically to ensure that they
light when braking.
.With a multi-point inspection, your dealer
can check the lamps and note any
concerns.
Shocks and Struts
Shocks and struts help aid in control for a
smoother ride.
.Signs of wear may include steering wheel
vibration, bounce/sway while braking,
longer stopping distance, or uneven
tire wear.
.As part of the multi-point inspection,
trained dealer technicians can visually
inspect the shocks and struts for signs of
leaking, blown seals, or damage, and can
advise when service is needed.

Chevrolet Bolt EV Owner Manual (GMNA-Localizing-U.S./Canada-
14637856) - 2021 - CRC - 10/2/20
Technical Data 261
Technical Data
Vehicle Identification
Vehicle Identification Number (VIN) . . . 261
Service Parts Identification . . . . . . . . . . . . . 261
Vehicle Data
Capacities and Specifications . . . . . . . . . . 262
Vehicle Identification
Vehicle Identification
Number (VIN)
This legal identifier is in the front corner of
the instrument panel, on the driver side of
the vehicle. It can be seen through the
windshield from outside. The Vehicle
Identification Number (VIN) also appears on
the Vehicle Certification label and certificates
of title and registration.
Engine Identification
The eighth character in the VIN is the
engine code. This code identifies the
vehicle's engine, specifications, and
replacement parts. See“Engine
Specifications” underCapacities and
Specifications 0262 for the vehicle's
engine code.
Service Parts Identification
There may be a large barcode on the
certification label on the center pillar that
you can scan for the following information:
.Vehicle Identification Number (VIN)
.Model designation
.Paint information
.Production options
If there is not a large barcode on this label,
then you will find this same information on
a label inside of the trunk.

Chevrolet Bolt EV Owner Manual (GMNA-Localizing-U.S./Canada-
14637856) - 2021 - CRC - 10/2/20
270 Customer Information
Choose a reputable repair facility that uses
quality replacement parts. See“Collision
Parts” earlier in this section.
In a crash, the sensing system may shut
down the high voltage system. See Battery -
North America 0204 for important safety
information. If an airbag has inflated, see
What Will You See after an Airbag Inflates?
0 42.
If the vehicle is damaged from a crash,
flood, fire, or other event it may be
necessary to have the vehicle inspected.
SeeBattery - North America 0204 for
important safety information.
Managing the Vehicle Damage Repair
Process
In the event that the vehicle requires
damage repairs, GM recommends that you
take an active role in its repair. If you have
a pre-determined repair facility of choice,
take the vehicle there, or have it towed
there. Specify to the facility that any
required replacement collision parts be
original equipment parts, either new
Genuine GM parts or recycled original GM
parts. Remember, recycled parts will not be
covered by the GM vehicle warranty. Insurance pays the bill for the repair, but
you must live with the repair. Depending on
your policy limits, your insurance company
may initially value the repair using
aftermarket parts. Discuss this with the
repair professional, and insist on Genuine
GM parts. Remember, if the vehicle is
leased, you may be obligated to have the
vehicle repaired with Genuine GM parts,
even if your insurance coverage does not
pay the full cost.
If another party's insurance company is
paying for the repairs, you are not obligated
to accept a repair valuation based on that
insurance company's collision policy repair
limits, as you have no contractual limits
with that company. In such cases, you can
have control of the repair and parts choices
as long as the cost stays within reasonable
limits.
Publication Ordering Information
Service Manuals
Service manuals have the diagnosis and
repair information on the engine,
transmission, axle, suspension, brakes,
electrical system, steering system, body, etc.
Customer Literature
Owner’s manuals are written specifically for
owners and are intended to provide basic
operational information about the vehicle.
The owner’s manual includes the
Maintenance Schedule for all models.
Customer literature publications available for
purchase include owner’s manuals, warranty
manuals, and portfolios. Portfolios include an
owner’s manual, warranty manual,
if applicable, and zip lock bag or pouch.
Current and Past Models
Service manuals and customer literature are
available for many current and past model
year GM vehicles.
To order, call 1-800-551-4123 Monday–Friday,
8:00 a.m.–6:00 p.m. eastern time
For credit card orders only (VISA,
MasterCard, or Discover), see Helm, Inc. at:
www.helminc.com.
To order by mail, write to:
Helm, Incorporated
Attention: Customer Service
47911 Halyard Drive
Plymouth, MI 48170
Make checks payable in U.S. funds.

Chevrolet Bolt EV Owner Manual (GMNA-Localizing-U.S./Canada-
14637856) - 2021 - CRC - 10/2/20
Index 285
E
Electric Drive Unit . . . . . . . . . . . . . . . . . . . . . . . 160
Electric Parking Brake . . . . . . . . . . . . . . . . . . . . 164
Electric Parking Brake Light . . . . . . . . . . . . . . . 86
Electrical Equipment, Add-On . . . . . . . . . . . . 195
Electrical Requirements for BatteryCharging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
Electrical System Fuses and Circuit Breakers . . . . . . . . . . . . . . 211
Instrument Panel Fuse Block . . . . . . . . . . . 214
Overload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
Emergency OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275
Energy Efficiency
Driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Energy Information . . . . . . . . . . . . . . . . . . . . . . . 97
Engine Cooling System . . . . . . . . . . . . . . . . . . . . . . . . 201
Entry Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Event Data Recorders . . . . . . . . . . . . . . . . . . . . 272
Exit Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Extended Parking . . . . . . . . . . . . . . . . . . . . . . . . 159
Extender, Seat Belt . . . . . . . . . . . . . . . . . . . . . . . .37
Exterior Lamp Controls . . . . . . . . . . . . . . . . . . . 107
Exterior Lamps Off Reminder . . . . . . . . . . . . 108
Exterior Lighting Battery Saver . . . . . . . . . . . 112
F
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Flashers, Hazard Warning . . . . . . . . . . . . . . . . .110
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250
Fluid
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
Folding Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Forward Collision Alert (FCA) System . . . . .174
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271
Front Pedestrian Braking (FPB) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
Front Seats Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Heated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Fuses Fuses and Circuit Breakers . . . . . . . . . . . . . . 211
Instrument Panel Fuse Block . . . . . . . . . . . 214
Underhood Compartment . . . . . . . . . . . . . . . 211
G
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Gauges
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Driver Efficiency . . . . . . . . . . . . . . . . . . . . . . . . 82
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 Gauges (cont'd)
Power Indicator . . . . . . . . . . . . . . . . . . . . . . . . . 83
Speedometer . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Trip Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Warning Lights and Indicators . . . . . . . . . . 79
General Information Service and Maintenance . . . . . . . . . . . . . . 252
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
Vehicle Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
GM Mobility Reimbursement Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265
H
Halogen Bulbs . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
Hands-Free Phone . . . . . . . . . . . . . . . . . . . . . . . . 130
Hazard Warning Flashers . . . . . . . . . . . . . . . . .110
Head Restraints . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
HeadlampsAiming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
Automatic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Bulb Replacement . . . . . . . . . . . . . . . . . . . . . . 208
Daytime Running Lamps (DRL) . . . . . . . . . 109
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
High Intensity Discharge (HID)Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
High-Beam On Light . . . . . . . . . . . . . . . . . . . . 89
High/Low Beam Changer . . . . . . . . . . . . . . 108
Lamps On Reminder . . . . . . . . . . . . . . . . . . . . 89