2009 CHEVROLET TRAIL BLAZER air conditioning

Vehicle 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 specic component, control, message,
gage, or indicator.
M:This symbol is shown when you need to see your
owner manual for additional instructions or information.
*:This symbol is shown when you need to see a
service manual for additional instructions or information.
Vehicle Symbol Chart
Here are some additional symbols that may be found on
the vehicle and what they mean. For more information
on the symbol, refer to the index.
0:Adjustable Pedals
9:Airbag Readiness Light
#:Air Conditioning
!:Antilock Brake System (ABS)
g:Audio Steering Wheel Controls or OnStar®
$:Brake System Warning Light
":Charging System
I:Cruise Control
B:Engine Coolant Temperature
O:Exterior Lamps
#:Fog Lamps
.:Fuel Gage
+:Fuses
i:Headlamp High/Low-Beam Changer
j:LATCH System Child Restraints
*:Malfunction Indicator Lamp
::Oil Pressure
}:Power
/:Remote Vehicle Start
>:Safety Belt Reminders
7:Tire Pressure Monitor
F:Traction Control
M:Windshield Washer Fluid
iv

Climate Controls
Dual Climate Control System
With this system the heating, cooling, and ventilation
can be controlled for the vehicle.
A.B. Fan Control
C. Driver and Passenger
Temperature Controls
D. Air Delivery Mode
ControlE. Recirculation
F. Air Conditioning
G. Rear Window
Defogger
Driver’s Side Temperature Lever:Raise or lower
the lever to increase or decrease the temperature
on the driver’s side of the vehicle.Passenger Side Temperature Lever:Raise or lower
the lever to increase or decrease the temperature on
the passenger side of the vehicle. This right lever
also adjusts the temperature to the rear seat outlets.
When the temperature outside is 0°F (-18°C) or lower,
use the engine coolant heater, if the vehicle has one,
to provide warmer air faster to the vehicle.
9(Fan Control):Turn clockwise or counterclockwise
to increase or decrease the fan speed. If the knob is in off
mode, outside air still enters the vehicle, and is directed
based on the position of the air delivery mode knob.
The temperature can still be adjusted using the
temperature knob.
Air Delivery Mode Control:Turn clockwise or
counterclockwise to change the airow direction
inside the vehicle.
To change the current mode, select one of the following:
H(Vent):Air is directed to the instrument panel
outlets.
)(Bi-Level):Air is divided between the instrument
panel and oor outlets. Some air is directed toward the
windshield and the side window outlets. Cooler air is
directed to the upper vents and warmer air to the oor
outlets.
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6(Floor):Air is directed to the oor outlets, with
some air directed to the windshield and the side window
outlets. The recirculation button cannot be selected
while in oor mode.
-(Defog):This mode clears the windows of fog or
moisture. Air is directed to the oor, windshield and
side window outlets. The recirculation button cannot
be selected while in defog mode.
1(Defrost):This mode clears the windows of fog or
frost more quickly. Air is directed to the windshield and
the side window outlets, with some air directed to the
oor outlets. The air conditioning compressor may run
to dehumidify the air to prevent window fogging.
The recirculation button cannot be selected while
in defrost mode.
Do not drive the vehicle until all the windows are clear.
#(Air Conditioning):Press to turn the
air-conditioning system on or off. An indicator light
comes on and the system begins to cool and dehumidify
the air inside of the vehicle. You may notice a slight
change in engine performance when the air conditioning
compressor shuts off and turns on again. This is normal.
@(Recirculation):Press to turn the recirculation
mode on. An indicator light comes to show that the
recirculation is on. This mode recirculates and helps to
quickly cool the air inside the vehicle. It can be used to
help prevent outside air and odors from entering the
vehicle. The air conditioning compressor will also come
on when this mode is activated. While in recirculation
mode, the windows may fog when the weather is cold
and damp. To clear the fog, select either the defog or
defrost mode and increase fan speed.
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Rear Window Defogger
The rear window defogger uses a warming grid to
remove fog from the rear window.
<(Rear):Press to turn the rear window defogger
on or off. An indicator light in the button comes on to
show that the rear window defogger is on. The rear
window defogger automatically turns off approximately
ten minutes after the button is pressed.
For vehicles with heated mirrors, they turn on when the
rear window defogger button is pressed.
Notice:Do not use anything sharp on the inside of
the rear window. If you do, you could cut or damage
the warming grid, and the repairs would not be
covered by the vehicle warranty. Do not attach a
temporary vehicle license, tape, a decal or anything
similar to the defogger grid.
Dual Automatic Climate Control
System
With this system the heating, cooling and ventilation
can be controlled on the vehicle. When the vehicle is
rst started and the climate control system is on, or if the
climate control system has been turned on, the display
shows the driver’s temperature setting for ve seconds.
Then it shows the outside temperature.
A. Driver and Passenger
Side Temperature
Controls
B. Fan Control
C. Display
D. AUTO
E. Power ButtonF. Recirculation
G. Air Conditioning
H. Defrost
I. Air Delivery Mode
Control
J. Rear Window
Defogger
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Outside Air Temperature Display
A new outside temperature reading is displayed if
the vehicle has been off for more than three hours.
If the vehicle has been off for less than three hours,
the old temperature reading may be displayed because
underhood heat is affecting the true outside temperature.
Underhood heat can also affect the outside temperature
while the engine is running. It may also take several
minutes of driving before the display updates to
the actual outside temperature.
Automatic Operation
AUTO (Automatic):When automatic operation is
active, the system controls the air delivery mode,
fan speed, and temperature inside the vehicle.
Use the steps below to place the entire system in
automatic mode:
1. Press AUTO.
When AUTO is selected, the air conditioning and air
inlet are automatically controlled. The air conditioning
compressor will run continuously when the outside
temperature is over approximately 40°F (4°C).
The air inlet will normally be set to outside air.
If it is hot outside, the air inlet automatically changes
to recirculate inside air to help quickly cool down
the vehicle.2. Set the driver’s and passenger’s temperature.
To nd your comfort setting, start with a 72°F (22°C)
temperature setting and allow about 20 minutes for
the system to adjust. Turn the driver or passenger
side temperature knob to adjust the temperature
setting as necessary. If a temperature setting of
60°F (15°C) is chosen, the system will remain at the
maximum cooling setting. If a temperature setting of
90°F (32°C) is chosen, the system remains at the
maximum heat setting. Choosing either maximum
setting may not cause the vehicle to heat or cool
any faster.Manual Operation
9(Off):Press to turn off the entire climate control
system. Outside air still enters the vehicle, and will be
directed to the oor. The system turns on by pressing
either AUTO, air delivery mode, fan control, or by
adjusting either temperature knob.
Driver’s Side Temperature Knob:Turn clockwise
or counterclockwise to increase or decrease the
temperature on the driver side of the vehicle.
The display will show the temperature setting
decreasing or increasing and an arrow pointing
toward the driver. This knob can also adjust the
passenger side temperature setting if the two
are linked.
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Passenger Side Temperature Knob:Turn clockwise
or counterclockwise to increase or decrease the
temperature on the passenger side of the vehicle. The
display will show the temperature setting decreasing or
increasing and an arrow pointing toward the passenger.
The passenger temperature setting can be set to match
and link to the driver’s temperature setting by pressing
and holding the AUTO button for three seconds. When
adjusting the driver side temperature setting, the
passenger side temperature setting will follow and both
arrows will appear on the display. The passenger side
temperature setting also resets and re-links to the driver
side temperature setting if the vehicle has been off for
more than three hours.
w9x(Fan Control):Press the arrows to increase
or decrease the fan speed. The display shows the
selected fan speed and the driver side temperature
setting for ve seconds.
C(Air Delivery Mode Control):Press to change the
direction of the airow in the vehicle. The air delivery
modes will appear on the display as it is being adjusted.
The display shows the selected air delivery mode and
the driver temperature setting for ve seconds.To change the current air delivery mode, select one of
the following:
H(Vent):Air is directed to the instrument panel
outlets.
)(Bi-Level):Air is divided between the instrument
panel and oor outlets. Some air is directed toward
the windshield and side window outlets. Cooler air is
directed to the upper outlets and warmer air to the
oor outlets.
6(Floor):Air is directed to the oor outlets. Some
air also comes out of the defroster and side window
outlets. The recirculation button cannot be selected
in oor mode.
-(Defog):This mode clears the windows of fog or
moisture. Air is directed to the oor and windshield
outlets.
0(Front Defrost):Press the front defrost button
to clear the windows of fog or frost more quickly. The
system automatically controls the fan speed if defrost is
selected from AUTO mode. If the outside temperature is
40°F (4°C) or warmer, the air conditioning compressor
runs automatically to help dehumidify the air and dry the
windshield.
Do not drive the vehicle until all the windows are clear.
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#A/C (Air Conditioning):Press to turn the air
conditioning system on or off. When the system is on,
the system automatically begins to cool and dehumidify
the air inside of the vehicle. The air conditioning symbol
appears on the display when the air conditioning is on
and turns off when the air conditioning is off.
If the air conditioning is turned off while in front defrost
or defog mode, the air conditioning symbol turns off,
however, the A/C compressor remains on to help
de-humidify the air inside the vehicle. If one of the
other modes is selected, the compressor will then
turn the A/C off until it is selected again or the AUTO
button is pressed.
To avoid fogging the inside glass on rainy and humid
days at a temperature above freezing, press the air
conditioning button to run the A/C compressor. Also it is
best to avoid the use of the recirculation mode except
when maximum air conditioning performance is needed
or for short times to avoid exterior odors.
You may notice a slight change in engine performance
when the air-conditioning compressor shuts off and turns
on again. This is normal.@(Recirculation):Press to turn the recirculation
mode on or off. An indicator light comes on to show
that recirculation is on. This mode recirculates and
helps to quickly cool the air inside the vehicle. It can
be used to help prevent outside air and odors from
entering the vehicle. Recirculation mode can be used
with vent and bi-level modes, but it cannot be used
with oor, defog or defrost modes.
If recirculation mode is selected with oor, defog,
or defrost modes, the indicator ashes three times
and turns off to indicate the selection is not available.
The air conditioning compressor may also run while
in recirculation mode. This is normal and helps to
prevent window fogging.
If the weather is cold and damp, the system may cause
the windows to fog while using recirculation mode.
If the windows do start to fog, select defog or defrost
mode and increase fan speed.
Recirculation mode, if selected, will be cleared when the
engine is turned off.
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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.
Tows a trailer.
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. In heavy traffic, let the engine idle in N (Neutral)
while stopped. If it is safe to do so, pull off the
road, shift to P (Park) or N (Neutral) and let
the engine idle.
If the temperature overheat gage is no longer in the
overheat zone or an overheat warning no longer
displays, the vehicle can be driven. Continue to drive
the vehicle slow for about 10 minutes. Keep a safevehicle distance from the car in front of you. If the
warning does not come back on, continue to drive
normally.
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.
Engine Fan Noise
The vehicle has a clutched engine cooling fan. When
the clutch is engaged, the fan spins faster to provide
more air to cool the engine. In most everyday driving
conditions the clutch is not engaged. This improves fuel
economy and reduces fan noise. Under heavy vehicle
loading, trailer towing, and/or high outside temperatures,
the fan speed increases when the clutch engages so
you may hear an increase in fan noise. This is normal
and should not be mistaken as the transmission slipping
or making extra shifts. It is merely the cooling system
functioning properly. The fan will slow down when
additional cooling is not required and the clutch
disengages.
You may also hear this fan noise when the engine is
started. The sound will go away as the fan clutch
disengages.
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