brake CHEVROLET BOLT EV 2022 Workshop Manual

Chevrolet BOLT EV Owner Manual (GMNA-Localizing-U.S./Canada-
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Vehicle Care 217
General Information
For service and parts needs, visit your
dealer. You will receive genuine GM parts
and GM-trained and supported service
people.
Genuine GM parts have one of these marks:
California Perchlorate Materials
Requirements
Certain types of automotive applications,
such as airbag initiators, seat belt
pretensioners, and lithium batteries
contained in electronic keys, may contain
perchlorate materials. Perchlorate Material–special handling may apply. See
www.dtsc.ca.gov/hazardouswaste/
perchlorate.
Accessories and Modifications
Adding non-dealer accessories or making
modifications to the vehicle can affect
vehicle performance and safety, including
such things as airbags, braking, stability,
ride and handling, emissions systems,
aerodynamics, durability, and electronic
systems like antilock brakes, traction control,
and stability control. These accessories or
modifications could even cause malfunction
or damage not covered by the vehicle
warranty.
Damage to suspension components caused
by modifying vehicle height outside of
factory settings will not be covered by the
vehicle warranty.
Damage to vehicle components resulting
from modifications or the installation or use
of non-GM certified parts, including control
module or software modifications, is not
covered under the terms of the vehicle
warranty and may affect remaining
warranty coverage for affected parts.
GM Accessories are designed to complement
and function with other systems on the
vehicle. See your dealer to accessorize the
vehicle using genuine GM Accessories
installed by a dealer technician.
Also, see
Adding Equipment to the
Airbag-Equipped Vehicle 047.
Vehicle Checks
Doing Your Own Service Work
{Warning
Never try to do your own service on high
voltage battery components. You can be
injured and the vehicle can be damaged if
you try to do your own service work.
Service and repair of these high voltage
battery components should only be
performed by a trained dealer technician
with the proper knowledge and tools.
Exposure to high voltage can cause shock,
burns, and even death. The high voltage
components in the vehicle can only be
serviced by technicians with special
training.
(Continued)

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Vehicle Care 221
1. Windshield Washer Fluid Reservoir. SeeWasher Fluid 0222.
2. Cabin Heating Coolant Reservoir. See Cooling System 0221.
3. High Voltage Battery Coolant Reservoir. See Cooling System 0221.
4. HPDM (High Power Distribution Module).
5. APM (Accessory Power Module), OBCM (On-Board Charging Module).
6. Brake Fluid Reservoir. See Brake Fluid
0 223.
7. SPIM, APM, and Charger Module Coolant Reservoir. See Cooling System 0221.
8. Battery. See Battery - North America
0 224.
9. Underhood Compartment Fuse Block. Underhood Compartment Fuse Block
0233.
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 0276.
The coolant reservoirs are in the underhood
compartment. See Underhood Compartment
Overview 0220.

Chevrolet BOLT EV Owner Manual (GMNA-Localizing-U.S./Canada-
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222 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 0220 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, and may also clog the
washer nozzle.
(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.

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Vehicle Care 223
{Warning
The brake wear warning sound means
that soon the brakes will not work well.
That could lead to a crash. When the
brake wear warning sound is heard, have
the vehicle serviced.
Caution
Continuing to drive with worn-out brake
linings could result in costly brake
repairs.
Some driving conditions or climates can
cause a brake squeal when the brakes are
first applied, clearing up following several
applications. This does not mean something
is wrong with the brakes.
Properly torqued wheel nuts are necessary
to help prevent brake pulsation. When tires
are rotated, inspect brake linings for wear
and evenly tighten wheel nuts in the proper
sequence to torque specifications. See
Capacities and Specifications 0285.
Brake pads should be replaced as complete
axle sets.
Brake Pedal Travel
See your dealer if the brake pedal does not
return to normal height, or if there is a
rapid increase in pedal travel. This could be
a sign that brake service may be required.
Replacing Brake System Parts
Always replace brake system parts with
new, approved replacement parts. If this is
not done, the brakes may not work
properly. The braking performance can
change in many ways if the wrong brake
parts are installed or if parts are improperly
installed.
Brake Fluid
The brake master cylinder reservoir is filled
with GM approved DOT 4 brake fluid as
indicated on the reservoir cap. See
Underhood Compartment Overview 0220 for
the location of the reservoir. Checking Brake Fluid
With the vehicle in P (Park) on a level
surface, the brake fluid level should be
between the minimum and maximum marks
on the brake fluid reservoir.
There are only two reasons why the brake
fluid level in the reservoir may go down:
.Normal brake lining wear. When new
linings are installed, the fluid level goes
back up.
.A fluid leak in the brake hydraulic system.
Have the brake hydraulic system fixed.
With a leak, the brakes will not
work well.
Always clean the brake fluid reservoir cap
and the area around the cap before
removing it.
Do not top off the brake fluid. Adding fluid
does not correct a leak. If fluid is added
when the linings are worn, there will be too
much fluid when new brake linings are
installed. Add or remove fluid, as necessary,
only when work is done on the brake
hydraulic system.
When the brake fluid falls to a low level,
the brake warning light comes on. See Brake
System Warning Light 085.

Chevrolet BOLT EV Owner Manual (GMNA-Localizing-U.S./Canada-
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224 Vehicle Care
Brake fluid absorbs water over time which
degrades the effectiveness of the brake fluid.
Replace brake fluid at the specified intervals
to prevent increased stopping distance. See
Maintenance Schedule0276.
What to Add
Use only GM approved DOT 4 brake fluid
from a clean, sealed container. See
Recommended Fluids and Lubricants 0281.
{Warning
The wrong or contaminated brake fluid
could result in damage to the brake
system. This could result in the loss of
braking leading to a possible injury.
Always use the proper GM approved
brake fluid.
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 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. See Customer
Assistance Offices 0287. 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” underCollision
Damage Repair 0291 for additional
information. If an airbag has inflated, see
What Will You See after an Airbag Inflates?
0 42.
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 https://
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.

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Vehicle Care 225
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.
A vehicle cover, which can reduce sun
loading on the vehicle and improve high
voltage battery life, is available from your
dealer.
Refer to the replacement number shown on
the original battery label when a new 12-volt
battery is needed. The vehicle has an
Absorbed Glass Mat (AGM) 12-volt battery.
Installation of a standard 12-volt battery will
result in reduced 12-volt battery life.
When using a 12-volt battery charger on the
12-volt AGM battery, some chargers have an
AGM battery setting on the charger.
If available, use the AGM setting on the
charger, to limit charge voltage to 14.8 volts.
{Warning
WARNING:Battery posts, terminals and
related accessories can expose you to
chemicals including lead and lead
compounds, which are known to the
State of California to cause cancer and
birth defects or other reproductive harm.
(Continued)
Warning (Continued)
Wash hands after handling. For more
information go to
www.P65Warnings.ca.gov.
See the warning on the back cover.
Vehicle Storage
{Warning
Batteries have acid that can burn you and
gas that can explode. You can be badly
hurt if you are not careful. See Jump
Starting - North America 0260 for tips
on working around a battery without
getting hurt.
Up to a Month
.Plug in the charge cord.
Planned Storage for more than a Month
.Do not plug in the charge cord.
.Remove the black negative (−) cable from
the 12-volt battery and attach a trickle
charger to the battery terminals or keep
the 12-volt battery cables connected and
trickle charge from the underhood remote positive (+) and negative (−) terminals.
See
Jump Starting - North America 0260
for the location of these terminals.
Caution
The vehicle is equipped with an AGM/
VRLA 12-volt battery, which can be
damaged by using the incorrect type of
trickle charger. An AGM/VRLA-compatible
charger must be used, with the
appropriate setting selected. Follow the
trickle charger manufacturer instructions.
After the battery cable is reconnected, it is
possible that the vehicle may not operate.
If this happens, the high voltage battery
may need to be charged.
Park Brake and P (Park)
Mechanism Check
{Warning
When you are doing this check, the
vehicle could begin to move. You or
others could be injured and property
could be damaged. Make sure there is
room in front of the vehicle in case it (Continued)

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226 Vehicle Care
Warning (Continued)
begins to roll. Be ready to apply the
regular brake at once should the vehicle
begin to move.
Park on a fairly steep hill, with the vehicle
facing downhill. Keeping your foot on the
regular brake, set the Electric Parking
Brake (EPB).
.To check the EPB's holding ability: With
the propulsion system active and the
electric drive unit in N (Neutral), slowly
remove foot pressure from the regular
brake pedal. Do this until the vehicle is
held by the EPB only.
.To check the P (Park) mechanism's holding
ability: With the propulsion system
active, shift to P (Park). Then release the
EPB and slowly remove foot pressure
from the regular brake pedal.
Contact your dealer if service is required.
Wiper Blade Replacement
Front Wiper Blade Replacement
Windshield wiper blades should be replaced
periodically. See the Maintenance Schedule
0 276. Replacement blades come in different types
and are removed in different ways. For
proper type and length, see
Maintenance
Replacement Parts 0281.
Caution
Allowing the wiper arm to touch the
windshield when no wiper blade is
installed could damage the windshield.
Any damage that occurs would not be
covered by the vehicle warranty. Do not
allow the wiper arm to touch the
windshield.
To replace the windshield wiper blade: 1. Pull the windshield wiper assembly away from the windshield.
2. Press the button in the middle of thewiper arm connector, and pull the wiper
blade away from the arm connector.
3. Remove the wiper blade.
4. Reverse Steps 1–3 for wiper blade replacement.
Rear Wiper Blade Replacement
The rear wiper blade and wiper arm have a
cover for protection. The cover must be
removed before the wiper blade can be
replaced.

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Vehicle Care 235
A fuse puller is in the underhood
compartment fuse block.
The vehicle may not be equipped with all of
the fuses, relays, and features shown.Fuses Usage
1 –
2 Power Window Rear
3 Cargo Lamp
4 Rechargeable Energy
Storage System 1
5 Power Seat Driver
7 –
8 –
9 –
10 –
11 Horn
12 –
13 Front Wiper Motor Driver
15 Front Wiper Motor
Co-driver
16 Electronic Brake Control
Module Supply Electronics
17 Rear Wiper Fuses
Usage
18 Liftgate
19 Seat Module Front
20 Washer 22 Linear Power Module
23 Electronic Brake Control
Module Supply Motor
24 Power Seat Lumbar
26 Transmission Range Control
Module
27 Aeroshutter
28 Auxiliary Oil Pump
29 Electric Brake Boost Motor
Source
30 Front Power Windows
31 In-panel Bussed Electrical
Center
32 Rear Window Defogger
33 Heated Exterior Rearview
Mirror
34 Pedestrian Friendly Alert
Function
35 – Fuses
Usage
36 –
37 Current Sensor
38 –/Humidity Sensor
39 –
40 Electric Brake Boost (ECU)
41 Power Line Communication
Module
42 Infant Only Supression
43 Window Switch
44 Rechargeable Energy
Storage System
45 Vehicle Integration Control
Module
46 Shifter Interface Board 47 Humidity Sensor
48 Shifter Interface Board
49 Interior Rearview Mirror 50 –
51 Electric Brake Boost
52 –
54 A/C Control Module

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Vehicle Care 247
If the TPMS is not functioning properly it
cannot detect or signal a low tire condition.
See your dealer for service if the TPMS
malfunction light and DIC message come on
and stay on.
Tire Fill Alert (If Equipped)
This feature provides visual and audible
alerts outside the vehicle to help when
inflating an underinflated tire to the
recommended cold tire pressure.
When the low tire pressure warning light
comes on:1. Park the vehicle in a safe, level place.
2. Set the parking brake firmly.
3. Place the vehicle in P (Park).
4. Add air to the tire that is underinflated. The turn signal lamp will flash.
When the recommended pressure is
reached, the horn sounds once and the
turn signal lamp will stop flashing and
briefly turn solid.
Repeat these steps for all underinflated tires
that have illuminated the low tire pressure
warning light.
{Warning
Overinflating a tire could cause the tire
to rupture and you or others could be
injured. Do not exceed the maximum
pressure listed on the tire sidewall. See
Tire Sidewall Labeling 0240 and
Vehicle Load Limits 0162.
If the tire is overinflated by more than
35 kPa (5 psi), the horn will sound multiple
times and the turn signal lamp will continue
to flash for several seconds after filling
stops. To release and correct the pressure,
while the turn signal lamp is still flashing,
briefly press the center of the valve stem.
When the recommended pressure is reached,
the horn sounds once.
If the turn signal lamp does not flash within
15 seconds after starting to inflate the tire,
the tire fill alert has not been activated or is
not working.
If the hazard warning flashers are on, the
tire fill alert visual feedback will not work
properly. The TPMS will not activate the tire fill alert
properly under the following conditions:.There is interference from an external
device or transmitter.
.The air pressure from the inflation device
is not sufficient to inflate the tire.
.There is a malfunction in the TPMS.
.There is a malfunction in the horn or turn
signal lamps.
.The identification code of the TPMS
sensor is not registered to the system.
.The battery of the TPMS sensor is low.
If the tire fill alert does not operate due to
TPMS interference, move the vehicle about
1 m (3 ft) back or forward and try again.
If the tire fill alert feature is not working,
use a tire pressure gauge.
TPMS Sensor Matching Process
Each TPMS sensor has a unique
identification code. The identification code
needs to be matched to a new tire/wheel
position after rotating the vehicle’s tires or
replacing one or more of the TPMS sensors.
The TPMS sensor matching process should
also be performed after replacing a spare
tire with a road tire containing the TPMS
sensor. The malfunction light and the DIC
message should go off at the next ignition

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248 Vehicle Care
cycle using POWERO. The sensors are
matched to the tire/wheel positions, using a
TPMS relearn tool, in the following order:
driver side front tire, passenger side front
tire, passenger side rear tire, and driver side
rear. See your dealer for service or to
purchase a relearn tool. A TPMS relearn tool
can also be purchased. See Tire Pressure
Monitor Sensor Activation Tool at
www.gmtoolsandequipment.com or call
1-800-GM TOOLS (1-800-468-6657).
There are two minutes to match the first
tire/wheel position, and five minutes overall
to match all four tire/wheel positions. If it
takes longer, the matching process stops
and must be restarted.
The TPMS sensor matching process is:
1. Set the parking brake.
2. Press POWER
Oto start the vehicle. See
Power Button 0165.
3. Make sure the Tire Pressure info page option is turned on. The info pages on
the DIC can be turned on and off
through the Options menu. See Driver
Information Center (DIC) 099.
4. Use the DIC controls on the right side of the steering wheel to scroll to the Tire
Pressure screen under the DIC info page. 5. Press and hold the thumbwheel in the
center of the DIC controls.
A message requesting acceptance of the
process may display.
The horn sounds twice to signal the
receiver is in relearn mode and the TIRE
LEARNING ACTIVE message displays on
the DIC screen.
6. Start with the driver side front tire.
7. Place the relearn tool against the tire sidewall, near the valve stem. Then press
the button to activate the TPMS sensor.
A horn chirp confirms that the sensor
identification code has been matched to
this tire and wheel position.
8. Proceed to the passenger side front tire, and repeat the procedure in Step 7.
9. Proceed to the passenger side rear tire, and repeat the procedure in Step 7.
10. Proceed to the driver side rear tire, and repeat the procedure in Step 7. The horn
sounds two times to indicate the sensor
identification code has been matched to
the driver side rear tire, and the TPMS
sensor matching process is no longer
active. The TIRE LEARNING ACTIVE
message on the DIC display screen
goes off. 11. Turn the vehicle off.
12. Set all four tires to the recommended air
pressure level as indicated on the Tire
and Loading Information label.
Tire Inspection
We recommend that the tires, including
the spare tire, if the vehicle has one, be
inspected for signs of wear or damage
at least once a month.
Replace the tire if:
.The indicators at three or more
places around the tire can be seen.
.There is cord or fabric showing
through the tire's rubber.
.The tread or sidewall is cracked, cut,
or snagged deep enough to show
cord or fabric.
.The tire has a bump, bulge, or split.
.The tire has a puncture, cut, or other
damage that cannot be repaired well
because of the size or location of the
damage.