fuses CHEVROLET BLAZER 2021 Owner's Manual

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14608203) - 2021 - CRC - 10/29/20
2 Introduction
Using this Manual
To quickly locate information about the
vehicle, use the Index in the back of the
manual. It is an alphabetical list of what is
in the manual and the page number where
it can be found.
Danger, Warning, and Caution
Warning messages found on vehicle labels
and in this manual describe hazards and
what to do to avoid or reduce them.
{Danger
Danger indicates a hazard with a high
level of risk which will result in serious
injury or death.
{Warning
Warning indicates a hazard that could
result in injury or death.
Caution
Caution indicates a hazard that could
result in property or vehicle damage.
A circle with a slash through it is a safety
symbol which means“Do not,” “Do not do
this,” or“Do not let this happen.”
Symbols
The vehicle has components and labels that
use symbols instead of text. Symbols are
shown along with the text describing the
operation or information relating to a
specific component, control, message, gauge,
or indicator.
M:Shown when the owner’s manual has
additional instructions or information.
*: Shown when the service manual has
additional instructions or information.
0: Shown when there is more information
on another page — “see page.” Vehicle Symbol Chart
Here are some additional symbols that may
be found on the vehicle and what they
mean. See the features in this manual for
information.
u:
Air Conditioning System
G:Air Conditioning Refrigerant Oil
9:Airbag Readiness Light
!:Antilock Brake System (ABS)
$:Brake System Warning Light
9:Dispose of Used Components Properly
P:Do Not Apply High Pressure Water
B:Engine Coolant Temperature
_:Flame/Fire Prohibited
H: Flammable
[:Forward Collision Alert
R:Fuse Block Cover Lock Location
+:Fuses
j:ISOFIX/LATCH System Child Restraints

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14608203) - 2021 - CRC - 10/29/20
86 Instruments and Controls
signal. The compass system will
automatically determine when a GPS signal
is restored and provide a heading again.
Clock
Set the time and date using the
infotainment system. See "Time / Date"
underSettings 0164.
Power Outlets
Power Outlets 12-Volt Direct Current
The vehicle is equipped with 12-volt outlets
that can be used to plug in electrical
equipment, such as a cell phone or MP3
player.
The power outlets are located:
.Inside the center console storage
compartment.
.In the rear cargo area.
Lift the cover to access the outlet and
replace when not in use.
There are also charging only USB ports on
the rear of the center console.
{Warning
Power is always supplied to the rear
cargo power outlet. Do not leave
electrical equipment plugged in when the
vehicle is not in use because the vehicle
could catch fire and cause injury or
death.
Caution
Leaving electrical equipment plugged in
for an extended period of time while the
ignition is off will drain the battery.
Always unplug electrical equipment when
not in use and do not plug in equipment
that exceeds the maximum 15 amp
rating.
Certain accessory plugs may not be
compatible with the accessory power outlet
and could overload vehicle and adapter
fuses. If a problem is experienced, see your
dealer.
When adding electrical equipment, be sure
to follow the proper installation instructions
included with the equipment. See Add-On
Electrical Equipment 0252.
Caution
Hanging heavy equipment from the
power outlet can cause damage not
covered by the vehicle warranty. The
power outlets are designed for accessory
power plugs only, such as cell phone
charge cords.
Power Outlet 110-V/120-V Alternating
Current
If equipped, this power outlet it can be used
to plug in electrical equipment that uses a
maximum limit of 150 watts.
The power outlet is on the rear of the
center console.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14608203) - 2021 - CRC - 10/29/20
Infotainment System 179
allow certain liability exclusions or damages
limitations, so to that extent the above may
not apply to you.
Export Control
You agree not to export from anywhere any
part of the Data provided to you or any
direct product thereof except in compliance
with, and with all licenses and approvals
required under, applicable export laws, rules
and regulations. Entire Agreement: These
terms and conditions constitute the entire
agreement between HERE (and its licensors,
including their licensors and suppliers) and
you pertaining to the subject matter hereof,
and supersedes in their entirety any and all
written or oral agreements previously
existing between us with respect to such
subject matter.
Governing Law
The above terms and conditions shall be
governed by the laws of the State of Illinois,
without giving effect to (i) its conflict of
laws provisions, or (ii) the United Nations
Convention for Contracts for the
International Sale of Goods, which is
explicitly excluded. You agree to submit to
the jurisdiction of the State of Illinois forany and all disputes, claims, and actions
arising from or in connection with the Data
provided to you hereunder.
Government End Users
If the Data is being acquired by or on behalf
of the United States government or any
other entity seeking or applying rights
similar to those customarily claimed by the
United States government, this Data is a
“commercial item”
as that term is defined at
48 C.F.R. (“FAR”) 2.101, is licensed in
accordance with this End User License
Agreement, and each copy of Data delivered
or otherwise furnished shall be marked and
embedded as appropriate with the following
“Notice of Use,” and be treated in
accordance with such Notice:
NOTICE OF USE
CONTRACTOR (MANUFACTURER/ SUPPLIER) NAME:
HERE North America, LLC
CONTRACTOR (MANUFACTURER/SUPPLIER)
ADDRESS:
425 West Randolph Street, Chicago, IL
60606.
This Data is a commercial item as defined in
FAR 2.101 and is subject to the End User
License Agreement under which this Data
was provided.
© 2014 HERE North America, LLC. All rights
reserved.
If the Contracting Officer, federal
government agency, or any federal official
refuses to use the legend provided herein,
the Contracting Officer, federal government
agency, or any federal official must notify
HERE prior to seeking additional or
alternative rights in the Data.
Unicode
Copyright © 1991-2010 Unicode, Inc. All
rights reserved. Distributed under the Terms
of Use in http://www.unicode.org/
copyright.html.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Vehicle Care 253
Vehicle Care
General Information
General Information . . . . . . . . . . . . . . . . . . . 254
California Proposition 65 Warning . . . . . 254
California Perchlorate MaterialsRequirements . . . . . . . . . . . . . . . . . . . . . . . . 254
Accessories and Modifications . . . . . . . . . 254
Vehicle Checks
Doing Your Own Service Work . . . . . . . . . 255
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255
Engine Compartment Overview . . . . . . . . 257
Engine Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262
Engine Oil Life System . . . . . . . . . . . . . . . . 264
Automatic Transmission Fluid . . . . . . . . . 265
Engine Air Filter Life System . . . . . . . . . . 265
Engine Air Cleaner/Filter . . . . . . . . . . . . . . 265
Cooling System . . . . . . . . . . . . . . . . . . . . . . . . 267
Engine Overheating . . . . . . . . . . . . . . . . . . . . 271
Washer Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273
Brake Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273
Battery - North America . . . . . . . . . . . . . . . 274
All-Wheel Drive . . . . . . . . . . . . . . . . . . . . . . . . 275
Automatic Transmission Shift Lock Control Function Check . . . . . . . . . . . . . . 275
Park Brake and P (Park) Mechanism Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275
Wiper Blade Replacement . . . . . . . . . . . . . 276 Windshield Replacement . . . . . . . . . . . . . . . 277
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277
Headlamp Aiming
Front Headlamp Aiming . . . . . . . . . . . . . . . 278
Bulb Replacement
Bulb Replacement . . . . . . . . . . . . . . . . . . . . . 278
High Intensity Discharge (HID)
Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
LED Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
Back-Up Lamps . . . . . . . . . . . . . . . . . . . . . . . . 278
Electrical System
High Voltage Devices and Wiring . . . . . . 279
Electrical System Overload . . . . . . . . . . . . 279
Fuses and Circuit Breakers . . . . . . . . . . . . 280
Engine Compartment Fuse Block . . . . . . 280
Instrument Panel Fuse Block . . . . . . . . . . 284
Rear Compartment Fuse Block . . . . . . . . . 285
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287
All-Season Tires . . . . . . . . . . . . . . . . . . . . . . . 288
Winter Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . 288
Summer Tires . . . . . . . . . . . . . . . . . . . . . . . . . 289
Tire Sidewall Labeling . . . . . . . . . . . . . . . . . 289
Tire Designations . . . . . . . . . . . . . . . . . . . . . . 291
Tire Terminology and Definitions . . . . . . 292
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . 294
Tire Pressure for High-Speed Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 295 Tire Pressure Monitor System . . . . . . . . . 296
Tire Pressure Monitor Operation . . . . . . 297
Tire Inspection . . . . . . . . . . . . . . . . . . . . . . . . 300
Tire Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . 300
When It Is Time for New Tires . . . . . . . . 301
Buying New Tires . . . . . . . . . . . . . . . . . . . . . 302
Different Size Tires and Wheels . . . . . . . 303
Uniform Tire Quality Grading . . . . . . . . . 303
Wheel Alignment and Tire Balance . . . . 305
Wheel Replacement . . . . . . . . . . . . . . . . . . . 305
Tire Chains . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305
If a Tire Goes Flat . . . . . . . . . . . . . . . . . . . . . 306
Tire Sealant and Compressor Kit . . . . . . . 307
Storing the Tire Sealant and
Compressor Kit . . . . . . . . . . . . . . . . . . . . . . . 313
Tire Changing . . . . . . . . . . . . . . . . . . . . . . . . . . 313
Compact Spare Tire . . . . . . . . . . . . . . . . . . . . 317
Jump Starting
Jump Starting - North America . . . . . . . . 318
Towing the Vehicle
Towing the Vehicle . . . . . . . . . . . . . . . . . . . . 320
Recreational Vehicle Towing . . . . . . . . . . . 321
Appearance Care
Exterior Care . . . . . . . . . . . . . . . . . . . . . . . . . . 323
Interior Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 327
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . . . . . 329

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14608203) - 2021 - CRC - 10/29/20
Vehicle Care 279
2. Remove the access cover.
3. Turn the bulb socket counterclockwiseand pull the bulb straight out of the
socket. 4. Replace the bulb and reverse Steps 1–3 to
reinstall.
Electrical System
High Voltage Devices and Wiring
{Warning
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.
High voltage components are identified
by labels. Do not remove, open, take
apart, or modify these components. High
voltage cable or wiring has orange
covering or labels. Do not probe, tamper
with, cut, or modify high voltage cable or
wiring.
Electrical System Overload
The vehicle has fuses and circuit breakers to
protect against an electrical system
overload. When the current electrical load is too
heavy, the circuit breaker opens and closes,
protecting the circuit until the current load
returns to normal or the problem is fixed.
This greatly reduces the chance of circuit
overload and fire caused by electrical
problems.
Fuses and circuit breakers protect power
devices in the vehicle.
Replace a bad fuse with a new one of the
identical size and rating.
If there is a problem on the road and a fuse
needs to be replaced, the same amperage
fuse can be borrowed. Choose some feature
of the vehicle that is not needed to use and
replace it as soon as possible.
Headlamp Wiring
An electrical overload may cause the lamps
to go on and off, or in some cases to
remain off. Have the headlamp wiring
checked right away if the lamps go on and
off or remain off.
Windshield Wipers
If the wiper motor overheats due to heavy
snow or ice, the windshield wipers will stop
until the motor cools and will then restart.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14608203) - 2021 - CRC - 10/29/20
280 Vehicle Care
Although the circuit is protected from
electrical overload, overload due to heavy
snow or ice may cause wiper linkage
damage. Always clear ice and heavy snow
from the windshield before using the
windshield wipers.
If the overload is caused by an electrical
problem and not snow or ice, be sure to get
it fixed.
Fuses and Circuit Breakers
The wiring circuits in the vehicle are
protected from short circuits by a
combination of fuses and circuit breakers.
This greatly reduces the chance of damage
caused by electrical problems.
{Danger
Fuses and circuit breakers are marked
with their ampere rating. Do not exceed
the specified amperage rating when
replacing fuses and circuit breakers. Use
of an oversized fuse or circuit breaker can
result in a vehicle fire. You and others
could be seriously injured or killed.
{Warning
Installation or use of fuses that do not
meet GM’s original fuse specifications is
dangerous. The fuses could fail, and result
in a fire. You or others could be injured
or killed, and the vehicle could be
damaged.
See Accessories and Modifications 0254 and
General Information 0254.
To check a fuse, look at the silver-colored
band inside the fuse. If the band is broken
or melted, replace the fuse. Be sure to
replace a bad fuse with a new one of the
identical size and rating. Fuses of the same amperage can be
temporarily borrowed from another fuse
location, if a fuse goes out. Replace the fuse
as soon as possible.
Engine Compartment Fuse Block
The underhood fuse block is in the engine
compartment, on the driver side of the
vehicle.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Vehicle Care 281
Caution
Do not pull the engine compartment fuse
block lever, since it is intended only for
service purposes. If pulled, vehicle
malfunction may occur.
To remove the fuse block cover, press the
clips on the cover and lift it straight up.
Caution
Spilling liquid on any electrical
component on the vehicle may damage
it. Always keep the covers on any
electrical component.
To remove fuses, use the fuse puller and
pull straight out.
The vehicle may not be equipped with all of
the fuses, relays, and features shown. Fuses Usage
F1 Antilock brake system pump

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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282 Vehicle Care
FusesUsage
F2 Starter 1
F3 DC DC transformer 1
F4 –
F5 DC DC transformer 2
F6 –
F7 Front blower
F8 Starter 3
F9 –
F10 –
F11 –
F12 Front wiper
F13 Starter 2
F14 –
F15 Rear wiper
F16 –
F17 –
F18 –
F19 –
F20 –
F21 – Fuses
Usage
F22 Electronic brake control module
F23 Parking/Trailer lamps
F24 Right trailer stoplamp/ Turnlamp
F25 Steering column lock
F26 –
F27 Left trailer stoplamp/ Turnlamp
F28 –
F29 –
F30 Washer pump F31 Spare/Right low-beam headlamp
F32 Left low-beam headlamp
F33 High-beam headlamp shutter/ Fog lamps
F34 Horn F35 –
F36 Right low-beam/Left high-beam headlamp Fuses
Usage
F37 Spare/Right high-beam headlamp
F38 Automatic headlamp leveling motor
F39 Transmission control module
F40 Left rear bus electrical center/DC DC ignition
F41 Instrument cluster
F42 Heating, ventilation, and air conditioning/
Central gateway
module run/crank
F43 Reflective light alert display
F44 Electronic brake control module/Electric brake
booster/Run/crank
F45 –
F46 –
F47 –
F48 –
F49 Interior rearview mirror

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Vehicle Care 283
FusesUsage
F50 Fuel system control module/Fuel tank zone
module run/crank
F51 Heated steering wheel
F52 Air conditioning clutch
F53 Coolant pump
F54 –
F55 –
F56 –
F57 Engine control module/ Ignition
F58 Transmission control module/Ignition
F59 Engine control module battery
F60 –
F61 O2 sensor 1/ Aeroshutter/Mass air
flow sensor
F62 Engine control module–odd
F63 O2 sensor 2 Fuses
Usage
F64 Engine control module–even
F65 Engine control module powertrain 1
F66 Engine control module powertrain 2
F67 Engine control module powertrain 3
F68 –
F69 –
F70 –
F71 –
F72 –
F73 –
F74 –
F75 –
F76 –
F77 – Relays
Usage
K1 Starter 1
K2 Run/Crank
K3 Starter 3
K4 –
K5 –
K6 –
K7 Engine control module
K8 Air conditioning
K9 –
K10 Starter 2

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14608203) - 2021 - CRC - 10/29/20
284 Vehicle Care
Instrument Panel Fuse Block
The instrument panel fuse block is inside the
center console on the passenger side of the
vehicle.
Remove the fuse access door by inserting a
coin or tool into the slot of the access door.
To remove a fuse, use the fuse puller
located in the Engine Compartment Fuse
block.
The vehicle may not be equipped with all of
the fuses, relays, and features shown.Fuses Usage
F1 Body control module 6 Fuses Usage
F2 Diagnostic link/Central gateway module
F3 Electric steering column lock
F4 –
F5 –
F6 Heating, ventilation, and air conditioning
F7 Body control module 3
F8 –
F9 Right front heated seat
F10 Airbag/Seatbelt F11 –
F12 Amplifier/Noise control module
F13 Body control module 7
F14 Left front heated seat F15 –
F16 Sunroof F17 –
F18 Instrument cluster