
Chevrolet BOLT EV Owner Manual (GMNA-Localizing-U.S./Canada-
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174 Driving and Operating
The speedometer reading can be displayed
in either English or metric units. See
Instrument Cluster079. The increment
value used depends on the units displayed.
Passing Another Vehicle While Using Cruise
Control
Use the accelerator pedal to increase the
vehicle speed. When you take your foot off
the pedal, the vehicle will slow down to the
previous set cruise speed. While pressing the
accelerator pedal or shortly following the
release to override cruise control, briefly
pressing −SET will result in cruise control set
to the current vehicle speed.
Using Cruise Control on Hills
How well the cruise control works on hills
depends upon the vehicle speed, load, and
the steepness of the hills. When going up
steep hills, you might have to step on the
accelerator pedal to maintain the vehicle
speed. When going downhill, you might
have to brake or shift to a lower gear to
keep your speed down. If the brake pedal is
applied, cruise control will disengage.
Ending Cruise Control
There are five ways to end cruise control:
.Step lightly on the brake pedal.
.Press*.
.Shift the electric drive unit to N (Neutral).
.Press5to turn the cruise control system
off completely.
.Activate Regen on Demand. See “Regen
on Demand” underRegenerative Braking
0 170.
Erasing Speed Memory
The cruise control set speed is erased from
memory if
5is pressed or if the vehicle is
turned off.
Adaptive Cruise Control (Camera)
If equipped, Adaptive Cruise Control (ACC)
allows the cruise control set speed and
following gap to be selected. Read this
entire section before using this system. The
following gap is the following time between
your vehicle and a vehicle detected directly
ahead in your path, moving in the same
direction. If no vehicle is detected in your
path, ACC works like regular cruise control.
ACC uses a windshield mounted front
camera sensor.
If a vehicle is detected in your path, ACC can
apply acceleration or limited, moderate
braking to maintain the selected following
gap. To disengage ACC, apply the brake. If ACC is controlling the vehicle speed when
the Traction Control System (TCS) or
StabiliTrak/Electronic Stability Control (ESC)
system activates, ACC may automatically
disengage. See
Traction Control/Electronic
Stability Control 0171. When road conditions
allow ACC to be safely used, ACC can be
turned back on.
When ACC is braking, a momentary motor
or clicking noise may be heard from the
Antilock Brake System (ABS). This is normal.
Disabling the TCS or StabiliTrak/ESC system
will disengage and prevent engagement
of ACC.
ACC can reduce the need for you to
frequently brake and accelerate, especially
when used on expressways, freeways, and
interstate highways. When used on other
roads, you may need to take over the
control of braking or acceleration more
often.
ACC automatically slows the vehicle down
while navigating the curve and may increase
speed out of the curve, but will not exceed
the set speed.

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Driving and Operating 179
Passing a Vehicle While Using ACC
If the set speed is high enough, and the left
turn signal is used to pass a vehicle ahead
in the selected following gap, ACC may
assist by gradually accelerating the vehicle
prior to the lane change.
{Warning
When using ACC to pass a vehicle or
perform a lane change, the following
distance to the vehicle being passed may
be reduced. ACC may not apply sufficient
acceleration or braking when passing a
vehicle or performing a lane change.
Always be ready to manually accelerate
or brake to complete the pass or lane
change.
Stationary or Very Slow-Moving Objects
{Warning
ACC may not detect and react to stopped
or slow-moving vehicles ahead of you. For
example, the system may not brake for a
vehicle it has never detected moving. This
can occur in stop-and-go traffic or when a
vehicle suddenly appears due to a vehicle (Continued)
Warning (Continued)
ahead changing lanes. Your vehicle may
not stop and could cause a crash. Use
caution when using ACC. Your complete
attention is always required while driving
and you should be ready to take action
and apply the brakes.
Irregular Objects Affecting ACC
ACC may have difficulty detecting the
following objects:
.Vehicles with cargo extending from the
back end.
.Non-standard shaped vehicles, such as
vehicle transport, vehicles with a side car
fitted, or horse carriages.
.Objects that are close to the front of your
vehicle.
.Vehicles in front of your vehicle that have
a rear aspect that is low, small,
or irregular.
.An empty truck or trailer that has no
cargo in the cargo bed
.Vehicles that are low to the road surface
.Vehicles on which extremely heavy cargo
is loaded in the cargo area or rear seat
ACC Automatically Disengages
ACC may automatically disengage and the
driver will need to manually apply the
brakes to slow the vehicle if:
.The front camera is blocked or visibility is
reduced.
.The Traction Control System (TCS) or
StabiliTrak/ESC system has activated or
been disabled.
.There is a fault in the system.
.A DIC message displays to indicate that
ACC is temporarily unavailable.
The ACC indicator will turn white when ACC
is no longer active.
In some cases, when ACC is temporarily
unavailable, regular cruise control may be
used. See “Switching Between ACC and

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Vehicle Care 213
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, Driver Assistance
Systems, 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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246 Vehicle Care
Buying New Tires
GM has developed and matched specific
tires for the vehicle. The original
equipment tires installed were designed
to meet General Motors Tire
Performance Criteria Specification (TPC
Spec) system rating. When replacement
tires are needed, GM strongly
recommends buying tires with the same
TPC Spec rating.
GM's exclusive TPC Spec system
considers over a dozen critical
specifications that impact the overall
performance of the vehicle, including
brake system performance, ride and
handling, traction control, and tire
pressure monitoring performance. GM's
TPC Spec number is molded onto the
tire's sidewall near the tire size. If the
tires have an all-season tread design,
the TPC Spec number will be followed
by MS for mud and snow. SeeTire
Sidewall Labeling 0236 for additional
information. GM recommends replacing worn tires in
complete sets of four. Uniform tread
depth on all tires will help to maintain
the performance of the vehicle. Braking
and handling performance may be
adversely affected if all the tires are not
replaced at the same time. If proper
rotation and maintenance have been
done, all four tires should wear out at
about the same time. However, if it is
necessary to replace only one axle set
of worn tires, place the new tires on
the rear axle. See
Tire Rotation0244.
{Warning
Tires could explode during improper
service. Attempting to mount or
dismount a tire could cause injury or
death. Only your dealer or authorized
tire service center should mount or
dismount the tires.
{Warning
Mixing tires of different sizes (other
than those originally installed on the
vehicle), brands, tread patterns,
or types may cause loss of vehicle
control, resulting in a crash or other
vehicle damage. Use the correct size,
brand, and type of tire on all wheels.
{Warning
Using bias-ply tires on the vehicle
may cause the wheel rim flanges to
develop cracks after many miles of
driving. A tire and/or wheel could fail
suddenly and cause a crash. Use only
radial-ply tires with the wheels on
the vehicle.
Winter tires with the same speed rating
as the original equipment tires may not
be available for H, V, W, Y and ZR
speed rated tires. Never exceed the
winter tires’ maximum speed capability
when using winter tires with a lower
speed rating.

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Vehicle Care 247
If the vehicle tires must be replaced
with a tire that does not have a TPC
Spec number, make sure they are the
same size, load range, speed rating, and
construction (radial) as the original
tires.
The Tire and Loading Information label
indicates the original equipment tires
on the vehicle. SeeVehicle Load Limits
0 158.
Different Size Tires and Wheels
If wheels or tires are installed that are a
different size than the original equipment
wheels and tires, vehicle performance,
including its braking, ride and handling
characteristics, stability, and resistance to
rollover may be affected. If the vehicle has
electronic systems such as antilock brakes,
rollover airbags, traction control, electronic
stability control, or All-Wheel Drive, the
performance of these systems can also be
affected.
{Warning
If different sized wheels are used, there
may not be an acceptable level of
performance and safety if tires not
recommended for those wheels are
selected. This increases the chance of a
crash and serious injury. Only use GM
specific wheel and tire systems developed
for the vehicle, and have them properly
installed by a GM certified technician.
See Buying New Tires 0246 and
Accessories and Modifications 0213.
Uniform Tire Quality Grading
The following information relates to the
system developed by the United States
National Highway Traffic Safety
Administration (NHTSA), which grades
tires by treadwear, traction, and
temperature performance. This applies
only to vehicles sold in the United
States. The grades are molded on the
sidewalls of most passenger car tires.
The Uniform Tire Quality Grading
(UTQG) system does not apply to deep
tread, winter tires, compact spare tires, tires with nominal rim diameters of
10 to 12 inches (25 to 30 cm), or to some
limited-production tires.
While the tires available on General
Motors passenger cars and light trucks
may vary with respect to these grades,
they must also conform to federal
safety requirements and additional
General Motors Tire Performance
Criteria (TPC) standards.
Quality grades can be found where
applicable on the tire sidewall between
tread shoulder and maximum section
width. For example:Treadwear 200 Traction AA Temperature A
All Passenger Car Tires Must Conform to
Federal Safety Requirements In Addition
To These Grades.
Treadwear
The treadwear grade is a comparative
rating based on the wear rate of the
tire when tested under controlled
conditions on a specified government
test course. For example, a tire graded
150 would wear one and one-half (1½)

Chevrolet BOLT EV Owner Manual (GMNA-Localizing-U.S./Canada-
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248 Vehicle Care
times as well on the government course
as a tire graded 100. The relative
performance of tires depends upon the
actual conditions of their use, however,
and may depart significantly from the
norm due to variations in driving habits,
service practices and differences in road
characteristics and climate.
Traction
The traction grades, from highest to
lowest, are AA, A, B, and C. Those
grades represent the tire's ability to
stop on wet pavement as measured
under controlled conditions on specified
government test surfaces of asphalt and
concrete. A tire marked C may have
poor traction performance. Warning:
The traction grade assigned to this tire
is based on straight-ahead braking
traction tests, and does not include
acceleration, cornering, hydroplaning,
or peak traction characteristics.Temperature
The temperature grades are A (the
highest), B, and C, representing the
tire's resistance to the generation of
heat and its ability to dissipate heat
when tested under controlled conditions
on a specified indoor laboratory test
wheel. Sustained high temperature can
cause the material of the tire to
degenerate and reduce tire life, and
excessive temperature can lead to
sudden tire failure. The grade C
corresponds to a level of performance
which all passenger car tires must meet
under the Federal Motor Safety
Standard No. 109. Grades B and A
represent higher levels of performance
on the laboratory test wheel than the
minimum required by law. Warning:
The temperature grade for this tire is
established for a tire that is properly
inflated and not overloaded. Excessive
speed, underinflation, or excessive
loading, either separately or in
combination, can cause heat buildup
and possible tire failure.Wheel Alignment and Tire
Balance
The tires and wheels were aligned and
balanced at the factory to provide the
longest tire life and best overall
performance. Adjustments to wheel
alignment and tire balancing are not
necessary on a regular basis. Consider an
alignment check if there is unusual tire wear
or the vehicle is significantly pulling to one
side or the other. Some slight pull to the
left or right, depending on the crown of the
road and/or other road surface variations
such as troughs or ruts, is normal. If the
vehicle is vibrating when driving on a
smooth road, the tires and wheels may
need to be rebalanced. See your dealer for
proper diagnosis.
Wheel Replacement
Replace any wheel that is bent, cracked,
or badly rusted or corroded. If wheel nuts
keep coming loose, the wheel, wheel bolts,
and wheel nuts should be replaced. If the
wheel leaks air, replace it. Some aluminum
wheels can be repaired. See your dealer if
any of these conditions exist.

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Vehicle Care 249
Your dealer will know the kind of wheel that
is needed.
Each new wheel should have the same
load-carrying capacity, diameter, width,
offset, and be mounted the same way as
the one it replaces.
Replace wheels, wheel bolts, wheel nuts,
or Tire Pressure Monitor System (TPMS)
sensors with new GM original equipment
parts.
{Warning
Using the wrong replacement wheels,
wheel bolts, or wheel nuts can be
dangerous. It could affect the braking and
handling of the vehicle. Tires can lose air
and cause loss of control, resulting in a
crash. Always use the correct wheel,
wheel bolts, and wheel nuts for
replacement.
{Warning
Replacing a wheel with a used one is
dangerous. How it has been used or how
far it has been driven may be unknown.(Continued)
Warning (Continued)
It could fail suddenly and cause a crash.
When replacing wheels, use a new GM
original equipment wheel.
Caution
The wrong wheel can also cause
problems with bearing life, brake cooling,
speedometer or odometer calibration,
headlamp aim, bumper height, vehicle
ground clearance, and tire or tire chain
clearance to the body and chassis.
Tire Chains
{Warning
Do not use tire chains. There is not
enough clearance. Tire chains used on a
vehicle without the proper amount of
clearance can cause damage to the
brakes, suspension, or other vehicle parts.
The area damaged by the tire chains
could cause loss of control and a crash.(Continued)
Warning (Continued)
Use another type of traction device only
if its manufacturer recommends it for the
vehicle's tire size combination and road
conditions. Follow that manufacturer's
instructions. To avoid vehicle damage,
drive slowly and readjust or remove the
traction device if it contacts the vehicle.
Do not spin the wheels. If traction
devices are used, install them on the tires
of the drive axle only.
If a Tire Goes Flat
It is unusual for a tire to blow out while
driving, especially if the tires are maintained
properly. SeeTires0234. If air goes out of
a tire, it is much more likely to leak out
slowly. But if there is ever a blowout, here
are a few tips about what to expect and
what to do.
If a front tire fails, the flat tire creates a
drag that pulls the vehicle toward that side.
Take your foot off the accelerator pedal and
grip the steering wheel firmly. Steer to
maintain lane position, and then gently
brake to a stop, well off the road,
if possible.

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Index 299
Circuit Breakers . . . . . . . . . . . . . . . . . . . . . . . . . . 229
CleaningExterior Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 262
Interior Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 265
Climate Control Systems Automatic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Cluster, Instrument . . . . . . . . . . . . . . . . . . . . . . . 79
Collision Damage Repair . . . . . . . . . . . . . . . . . 283
Compartment Underhood . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
Compartments Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Compass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Compressor Kit, Tire Sealant . . . . . . . . . . . . . 250
Connected Services Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 294
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296
Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294
Connections Connected Services . . . . . . . . . . . . . . . . . . . . 294
Control Traction and Electronic Stability . . . . . . . . 171
Control of a Vehicle . . . . . . . . . . . . . . . . . . . . . .154
Controls Steering Wheel . . . . . . . . . . . . . . . . . . . . . . . . . 111
Convex Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
Courtesy Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Courtesy Transportation Program . . . . . . . . 282
Cover
Cargo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172 Adaptive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Cupholders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Customer Assistance Offices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279
Text Telephone (TTY) Users . . . . . . . . . . . . 280
Customer Information Publications Ordering Information . . . . . 285
Customer Satisfaction Procedure . . . . . . . . . 278
Cybersecurity . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287
D
Damage Repair, Collision . . . . . . . . . . . . . . . . . 283
Danger, Warning, and Caution . . . . . . . . . . . . . .2
Dashboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Data Collection OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288
Data Recorders, Event . . . . . . . . . . . . . . . . . . . 287
Daytime Running Lamps (DRL) . . . . . . . . . . . 105
Defensive Driving . . . . . . . . . . . . . . . . . . . . . . . . . 153
Delayed Charging Override . . . . . . . . . . . . . . 200
Delayed Locking . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Diagnostics
Connected Services . . . . . . . . . . . . . . . . . . . . 296
Disabled Vehicle Transporting . . . . . . . . . . . . . . . . . . . . . . . . . . . 258
Distracted Driving . . . . . . . . . . . . . . . . . . . . . . . . . 153
Dome Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Door Ajar Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Delayed Locking . . . . . . . . . . . . . . . . . . . . . . . . . 17
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Power Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Drive Unit Electric . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Driver Assistance Systems . . . . . . . . . . . . . . . . . . . . 183
Efficiency Gauge . . . . . . . . . . . . . . . . . . . . . . . . 82
Information Center (DIC) . . . . . . . . . . . . . . . . 99
Selected Operating Modes . . . . . . . . . . . . . 164
Teen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Driving Assistance Systems . . . . . . . . . . . . . . . . . . . . 188
Defensive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Distracted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Hill and Mountain Roads . . . . . . . . . . . . . . 156
If the Vehicle is Stuck . . . . . . . . . . . . . . . . . 158
Impaired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Loss of Control . . . . . . . . . . . . . . . . . . . . . . . . 155
Off-Road Recovery . . . . . . . . . . . . . . . . . . . . . 155