2019 CHEVROLET BLAZER air conditioning

Chevrolet Blazer (GMNA-Localizing-U.S./Canada/Mexico-12461541) - 2019 -
CRC - 3/11/19
Introduction 3
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 (GMNA-Localizing-U.S./Canada/Mexico-12461541) - 2019 -
CRC - 3/11/19
In Brief 17
INT :Move the windshield wiper
lever to INT. Turn the band up for
more frequent wipes or down for
less frequent wipes.
OFF : Use to turn the wipers off.
1X : For a single wipe, briefly move
the lever down. For several wipes,
hold the lever down.
f: Pull the lever toward you to
spray windshield washer fluid and
activate the wipers.
See Windshield Wiper/Washer
0 117 and
Rear Window Wiper/Washer 0118.
Climate Controls
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
See Dual Automatic Climate Control
System 0170.

Chevrolet Blazer (GMNA-Localizing-U.S./Canada/Mexico-12461541) - 2019 -
CRC - 3/11/19
170 Climate Controls
Climate Controls
Climate Control Systems
Dual Automatic ClimateControl System . . . . . . . . . . . . . 170
Air Vents
Air Vents . . . . . . . . . . . . . . . . . . . . . 174
Maintenance
Passenger Compartment AirFilter . . . . . . . . . . . . . . . . . . . . . . . . 175
Service . . . . . . . . . . . . . . . . . . . . . . . 175
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

Chevrolet Blazer (GMNA-Localizing-U.S./Canada/Mexico-12461541) - 2019 -
CRC - 3/11/19
Climate Controls 171
10. Rear Window Defogger
11. Fan Control
Climate Control Display
1. Driver and PassengerTemperature Settings
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. See the infotainment
manual.
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

Chevrolet Blazer (GMNA-Localizing-U.S./Canada/Mexico-12461541) - 2019 -
CRC - 3/11/19
172 Climate Controls
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.
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

Chevrolet Blazer (GMNA-Localizing-U.S./Canada/Mexico-12461541) - 2019 -
CRC - 3/11/19
Climate Controls 175
.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.
See Maintenance Schedule 0350.
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
0350.

Chevrolet Blazer (GMNA-Localizing-U.S./Canada/Mexico-12461541) - 2019 -
CRC - 3/11/19
276 Vehicle Care
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 0262 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 (GMNA-Localizing-U.S./Canada/Mexico-12461541) - 2019 -
CRC - 3/11/19
Vehicle Care 289
FusesUsage
F18 –
F19 –
F20 –
F21 –
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 Fuses
Usage
F32 Left low-beam headlamp
F33 High-beam headlamp shutter/
Fog lamps
F34 Horn
F35 –
F36 Right low-beam/ Left high-beam
headlamp
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 Fuses
Usage
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 system control module/Fuel tank
zone module run/
crank
F51 Heated steering wheel