air conditioning CHEVROLET BLAZER 2023 Owners Manual

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16401961) - 2023 - CRC - 5/17/22
Introduction 3
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
Q:Keep Fuse Block Covers Properly
Installed
|: Lane Change Alert
@:Lane Departure Warning
A:Lane Keep Assist
*: Malfunction Indicator Lamp
::Oil Pressure
X:Park Assist
~:Pedestrian Ahead Indicator
O:Power
7:Rear Cross Traffic Alert
I:Registered Technician
/:Remote Vehicle Start
h:Risk of Electrical Fire
>:Seat Belt Reminders
I:Side Blind Zone Alert
h:Stop/Start
7:Tire Pressure Monitor
d:Traction Control/StabiliTrak/Electronic
Stability Control (ESC)
a: Under Pressure
k: Vehicle Ahead Indicator

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16401961) - 2023 - CRC - 5/17/22
Climate Controls 173
Climate Controls
Climate Control Systems
Dual Automatic Climate ControlSystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
Air Vents
Air Vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
Maintenance
Passenger Compartment Air Filter . . . . . 177
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
Climate Control Systems
Dual Automatic Climate Control System
The heating, cooling, and ventilation for the vehicle can be controlled with this system.
1. Driver and Passenger Temperature Controls
2. Air Delivery Mode Controls
3.
O(Power)
4. SYNC (Synchronized Temperature)
5. AUTO (Automatic Operation)
6. A/C (Air Conditioning)
7. Recirculation 8. Driver and Passenger Heated and
Ventilated Seats (If Equipped)
9. Defrost
10. Rear Window Defogger
11. Fan Control

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16401961) - 2023 - CRC - 5/17/22
174 Climate Controls
Climate Control Display
1. Driver and Passenger TemperatureSettings
2. Fan Control
3. Driver and Passenger Temperature Controls
4. Sync (Synchronized Temperature)
5. Recirculation
6. Air Delivery Mode Controls
7. Auto (Automatic Operation)
8. A/C (Air Conditioning)
9. On/Off (Power) The fan, air delivery mode, air conditioning,
driver and passenger temperatures, and Sync
settings can be controlled by touching
CLIMATE on the infotainment Home Page or
the climate button in the climate control
display application tray. A selection can then
be made on the front climate control page
displayed.
Climate Control Status Display
The climate control status display appears
briefly when the center stack climate
controls are adjusted.
Automatic Operation
The system automatically controls the fan
speed, air delivery, air conditioning, and
recirculation in order to heat or cool the
vehicle to the desired temperature.
When AUTO is lit, all four functions operate
automatically. Each function can also be
manually set and the selected setting is
displayed. Functions not manually set will
continue to be automatically controlled,
even if the AUTO indicator is not lit.
For automatic operation:
1. Press AUTO.
2. Set the temperature. Allow the system time to stabilize. Adjust the temperature
as needed for best comfort.
To improve fuel efficiency and to cool the
vehicle faster with A/C on, recirculation may
be automatically selected in warm weather.
Press
@to select recirculation; press it
again to select outside air.
Driver and Passenger Temperature
Controls : The temperature can be adjusted
separately for the driver and the passenger.
Turn the knob clockwise or counterclockwise
to increase or decrease the driver or
passenger temperature setting.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16401961) - 2023 - CRC - 5/17/22
Climate Controls 175
SYNC :Press to link all passenger
temperature settings to the driver setting.
The SYNC indicator light will turn on. When
the passenger settings are adjusted, the
SYNC indicator light turns off.
Manual Operation
O: Press to turn the fan off or on. When
off is selected, the system will prevent air
from flowing into the cabin. If on is
selected, or any other button is pressed, the
climate control system will turn on and
return to delivering airflow as set. The
temperature control and air delivery mode
can still be adjusted.
^: Press to increase or decrease the fan
speed. The fan speed setting appears on the
main display. Pressing any airflow mode
button cancels automatic fan control and
the fan is controlled manually. Press AUTO
to return to automatic operation.
Air Delivery Mode Controls : Press
X,Y,
or
[to change the direction of the
airflow. Any combination of the three
buttons can be selected. The indicator light
in the button will turn on. The current mode
appears in the display. Pressing either
button cancels automatic air delivery control and the direction of the airflow is controlled
manually. Press AUTO to return to
automatic operation.
To change the current mode, select one or
more of the following modes:
X:
Clears the windows of fog or moisture.
Air is directed to the windshield.
Y: Air is directed to the instrument panel
outlets.
[: Air is directed to the floor outlets.
0MAX : Air is directed to the windshield,
the fan runs at a higher speed, and the
temperature of the air is increased if not
already at maximum. This mode overrides
the previous mode selected and clears fog or
frost from the windshield more quickly.
When the button is pressed again, the
system returns to the previous mode setting
and fan speed.
For best results, clear all snow and ice from
the windshield before defrosting and do not
use recirculation.
A/C : Press to turn the air conditioning
system on or off. If the climate control
system is turned off or the outside
temperature falls below freezing, the air
conditioner will not run. Pressing this button cancels automatic air
conditioning and turns off the air
conditioner. Press AUTO to return to
automatic operation and the air conditioner
runs automatically as needed. When the
indicator light is on, the air conditioner runs
automatically to cool the air inside the
vehicle or to dry the air needed to defog
the windshield faster.
@:
Press to turn on recirculation. An
indicator light comes on. Air is recirculated
to quickly cool the inside of the vehicle or
to reduce the entry of outside air and odors.
If selected during cool or cold weather, the
windshield and windows may fog. Turn off
recirculation to help clear the windshield
and windows.
Auto Defog : The climate control system
may have a sensor to automatically detect
high humidity inside the vehicle. When high
humidity is detected, the climate control
system may adjust to outside air supply and
turn on the air conditioner. The fan speed
may slightly increase to help prevent
fogging. If the climate control system does
not detect possible window fogging, it
returns to normal operation.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16401961) - 2023 - CRC - 5/17/22
Climate Controls 177
Air Vents
Use the air outlets in the center and on the
side of the instrument panel to direct the
airflow. Turn the center knobs on the air
outlets counterclockwise or clockwise to
open or close off the airflow.
Operation Tips
.Clear away any ice, snow,
or leaves from the air inlets at the base
of the windshield that can block the flow
of air into the vehicle.
.Clear snow off the hood to improve
visibility and help decrease moisture
drawn into the vehicle.
.Use of non-GM approved hood deflectors
can adversely affect the performance of
the system.
.Keep the path under all seats clear of
objects to help circulate the air inside the
vehicle more effectively.
.If fogging reoccurs while in vent or in a
combination mode with mild temperature
throughout the vehicle, turn on the air
conditioner to reduce windshield fogging.
Maintenance
Passenger Compartment Air Filter
The filter reduces dust, pollen, and other
airborne irritants from outside air that is
pulled into the vehicle. The filter should be
replaced as part of routine scheduled
maintenance. SeeMaintenance Schedule
0 317.
See your dealer regarding replacement of
the filter.
Service
All vehicles have a label underhood that
identifies the refrigerant used in the vehicle.
The refrigerant system should only be
serviced by trained and certified technicians.
The air conditioning evaporator should never
be repaired or replaced by one from a
salvage vehicle. It should only be replaced
by a new evaporator to ensure proper and
safe operation.
During service, all refrigerants should be
reclaimed with proper equipment. Venting
refrigerants directly to the atmosphere is
harmful to the environment and may also create unsafe conditions based on
inhalation, combustion, frostbite, or other
health-based concerns.
The air conditioning system requires periodic
maintenance. See
Maintenance Schedule
0 317.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16401961) - 2023 - CRC - 5/17/22
Vehicle Care 261
6. Verify coolant level after the engine isshut off and the coolant is cold.
If necessary, repeat coolant fill procedure
Steps 1–6.
If the coolant still is not at the proper
level when the system cools down again,
see your dealer.
Caution
If the pressure cap is not tightly installed,
coolant loss and engine damage may
occur. Be sure the cap is properly and
tightly secured.
2.0L L4 Engine Only - Automatic Coolant
Service Fill Instructions
If equipped, this feature assists in filling and
removing air from the cooling system after
service of components or when coolant is
added after being too low.
To activate the fill and air removal process:
1. With a cold system, add coolant to the indicated mark on the surge tank.
2. Replace the cap on the surge tank.
3. Connect the vehicle to a battery charger.
4. Turn the ignition to Service Mode. See Ignition Positions 0192. 5. Turn off the air conditioning.
6. Set the parking brake.
7. At the same time, press the accelerator
and the brake for two seconds, then
release.
At the end of the cycle, check the coolant
level in the surge tank and add coolant if it
is low. Turn off the vehicle, allow the
Electronic Control Module (ECM) to go to
sleep, about two minutes, and repeat
Steps 4–7.
Listen for pump activation and movement of
the control valves while watching the level
of the coolant in the surge tank. If the tank
empties, turn the ignition off, carefully
remove the surge tank cap, refill to the
indicated mark, and repeat Steps 4–7. The
fill and air removal process will run for
approximately 10 minutes.
Engine Overheating
The vehicle has several indicators to warn of
the engine overheating.
There is an engine coolant temperature
gauge on the instrument cluster. See Engine
Coolant Temperature Gauge 097. The
vehicle may also display a message on the
Driver Information Center (DIC). If the decision is made not to lift the hood
when this warning appears, get service help
right away. See
Roadside Assistance Program
0 332.
If the decision is made to lift the hood,
make sure the vehicle is parked on a level
surface. Then check to see if the engine
cooling fan is running. If the engine is
overheating, the fan should be running. If it
is not, do not continue to run the engine.
Have the vehicle serviced.
Caution
Do not run the engine if there is a leak
in the engine cooling system. This can
cause a loss of all coolant and can
damage the system and vehicle. Have
any leaks fixed right away.
If Steam Is Coming from the Engine
Compartment
{Warning
Steam and scalding liquids from a hot
cooling system are under pressure.
Turning the pressure cap, even a little,
can cause them to come out at high (Continued)

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16401961) - 2023 - CRC - 5/17/22
262 Vehicle Care
Warning (Continued)
speed and you could be burned. Never
turn the cap when the cooling system,
including the pressure cap, is hot. Wait
for the cooling system and pressure cap
to cool.
If No Steam Is Coming from the Engine
Compartment
If an engine overheat warning is displayed
but no steam can be seen or heard, the
problem may not be too serious. Sometimes
the engine can get a little too hot when the
vehicle:
.Climbs a long hill on a hot day.
.Stops after high-speed driving.
.Idles for long periods in traffic.
If the overheat warning is displayed with no
sign of steam: 1. Turn the air conditioning off.
2. Turn the heater on to the highest temperature and to the highest fan
speed. Open the windows as necessary.
3. When it is safe to do so, pull off the road, shift to P (Park) or N (Neutral), and
let the engine idle. If the engine coolant temperature gauge is
no longer in the overheated area, the
vehicle can be driven. Continue to drive the
vehicle slowly for about 10 minutes. Keep a
safe distance from the vehicle in front. If the
warning does not come back on, continue to
drive normally and have the cooling system
checked for proper fill and function.
If the warning continues, pull over, stop, and
park the vehicle right away.
If there is no sign of steam, idle the engine
for three minutes while parked. If the
warning is still displayed, turn off the
engine until it cools down.
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
Engine Compartment Overview
0250 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.
.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.
(Continued)

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16401961) - 2023 - CRC - 5/17/22
272 Vehicle Care
FusesUsage
F21 –
F22 Electronic Brake Control Module
F23 Parking/Trailer Lamps
F24 Right Trailer Stoplamp/ Turnlamp
F25 Spare
F26 Daytime Running Lamp Right
F27 Left Trailer Stoplamp/ Turnlamp
F28 –
F29 –
F30 Washer Pump F31 –
F32 –
F33 –
F34 Horn F35 –
F36 –
F37 – Fuses
Usage
F38 Spare
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 F50 Fuel Tank Zone Module Run/Crank
F51 Heated Steering Wheel Fuses
Usage
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
F64 Engine Control Module–Even
F65 Engine Control Module Powertrain 1

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16401961) - 2023 - CRC - 5/17/22
Vehicle Care 273
FusesUsage
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 – Relays
Usage
K6 –
K7 Engine Control Module
K8 Air Conditioning
K9 –
K10 Starter 2
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.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16401961) - 2023 - CRC - 5/17/22
274 Vehicle Care
The vehicle may not be equipped with all of
the fuses, relays, and features shown.Fuses Usage
F1 Body Control Module 6
F2 Diagnostic Link/Central Gateway Module
F3 Spare/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 Fuses Usage
F17 –
F18 Instrument Cluster
F19 Body Control Module 1
F20 Rear Seat Entertainment F21 Body Control Module 4
F22 Infotainment USB Data/ Aux Jack
F23 Body Control Module 2
F24 USB Charger/Wireless Charging
F25 Park Assist
F26 Communications Integration Module
F27 –
F28 Heating, Ventilation, and Air Conditioning/
Information
Communication System
Display
F29 Radio
F30 Steering Wheel Adjustment Controls Fuses Usage
F31 Electric Brake Control Module Electric Brake
Booster
F32 DC AC Inverter
F33 Driver Power Seat
F34 Passenger Power Seat F35 Battery IEC 1 Feed
F36 Electric Power Steering F37 Rear Seat Entertainment/USB
Charge/Wireless
Charging Module/
Auxiliary Power Outlet/
Lighter
F38 Body Control Module 8
F39 –
Circuit Breakers/ Minifuse Usage
F40 –
F41 –
F42 Auxiliary Power Outlet (CB)/Lighter (Minifuse)