BUICK LUCERNE 2009 Owner's Manual

6(Floor):Air is directed to the oor outlets, with
some air directed to the windshield and side window
outlets.
If recirculation is selected while in this mode, it stays on
for three minutes to reduce windshield fogging.
-(Floor/Defog):This clears the windows of fog
or moisture. Air is directed to the windshield and side
window outlets and to the oor outlets. The system
runs the air conditioning compressor unless the outside
temperature is near or below freezing.
0(Defrost):This mode clears the windshield of fog or
frost more quickly. Air is directed to the windshield and
side window outlets. The system runs the air conditioning
compressor unless the outside temperature is near or
below freezing.
#(Air Conditioning):Press to turn the air conditioning
system on or off. An indicator light below the button
comes on to show that this mode is on. Air conditioning
can be selected in any mode as long as the fan knob
is not in the off position.
On hot days during the vehicle’s initial start-up, open
the windows to let hot inside air escape; then close them.
This helps to reduce the time it takes for the vehicle to
cool down. It also helps the system to operate more
efficiently.For quicker cool down on hot days, do the following:
1. Select
H.
2. Select
h.
3. Select
#.
4. Select the coolest temperature.
5. Select the highest fan speed.
The air-conditioning system removes moisture from
the air, so a small amount of water might drip under
the vehicle while idling or after turning off the engine.
This is normal.
h(Recirculation):Press to turn the recirculation
mode on. An indicator light below the button comes on
to show that this mode is on. This mode recirculates and
helps to quickly cool the air inside the vehicle. It can be
used to prevent outside air and odors from entering the
vehicle. This mode cannot be selected while in the defog
or defrost modes. If you try to select the recirculation
mode, the indicator light ashes three times and turns off.
Operation in this mode during periods of high humidity
and cool outside temperatures may result in increased
window fogging. If window fogging is experienced, select
the defrost mode.
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Rear Window Defogger
The rear window defogger uses a warming grid to
remove fog from the rear window.
<(Rear Window Defogger):Press to turn the rear
window defogger on or off. An indicator light below the
button comes on to show that the rear window defogger is
on. Be sure to clear as much snow from the rear window
as possible.
The rear window defogger only works when the ignition is
in ON/RUN. The rear window defogger stays on for about
20 minutes after the button is pressed if traveling at slow
speeds. At higher vehicle speeds, the rear defogger may
stay on continuously. If turned on again, the defogger
only runs for about 10 minutes before turning off. The
defogger can be turned off by pressing the button again,
by turning the ignition to ACC/ACCESSORY or ON/RUN,
or by turning off the engine.
If the vehicle has heated outside rearview mirrors, the
mirrors heat to help clear fog or frost from the surface
of the mirror when the rear window defogger is on.
SeeOutside Heated Mirrors on page 2-37for more
information.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
The heating, cooling, and ventilation for the vehicle can
be controlled with this system.
For vehicles with the remote start feature and it is
activated, the climate control system heats or cools the
inside of the vehicle, with the settings used before the
vehicle was turned off. The heated seats, if the vehicle
has them, and the rear window defogger will be turned
on by the climate control system when it is cold outside.
The cooled seat setting is not activated during a remote
start. Normal operation of the system will return after
the key is turned to the ON/RUN position. SeeRemote
Keyless Entry (RKE) System Operation on page 2-5for
more information.
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A. Driver and Passenger
Temperature Controls
B. Fan Control
C. Display
D. Air Delivery Mode
ControlE. Air Conditioning
F. Outside Air
G. Recirculation
H. PASS
I. Rear Window
Defogger
Automatic Operation
AUTO (Automatic Fan):When AUTO is selected on
the fan control, the system automatically adjusts the fan
speed. If the OnStar
®system is activated when this
position is selected, the fan speed will lower.
AUTO (Automatic Mode)
1. Turn the fan control to AUTO.
2. Turn the mode control to AUTO.
3. Adjust the temperature to a comfortable setting
between 68°F (21°C) and 78°F (26°C).
Choosing the coldest or warmest temperature
setting will not cause the system to heat or cool any
faster. In cold weather, the system starts at reduced
fan speeds to avoid blowing cold air into the vehicle
until warmer air is available. The system will start
out blowing air to the oor, but may change modes
automatically as the vehicle warms up to maintain
the chosen temperature setting. The length of time
needed to warm the interior depends on the outside
temperature.
4. Wait a few minutes for the system to automatically
regulate. Then adjust the temperature as necessary
to nd your comfort setting.
Do not cover the solar sensor located in the center of
the instrument panel, near the windshield. For more
information on the solar sensor, see “Sensors” later in
this section.
After the vehicle is started, the display shows the
interior temperature settings.
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When the ENG/MET (English/metric) button on the
Driver Information Center (DIC) is pressed, the display
shows readings in Fahrenheit or Celsius. Use the
ENG/MET button to toggle between the readings.
AUTO (Automatic Air Conditioning):If AUTO
is selected on the fan or mode control, the system
automatically controls the air conditioning compressor.
The A/C compressor runs automatically even at cool
outside temperatures in order to dehumidify the air.
The A/C indicator light is lit when the system is operating
automatically. Press the A/C button on the fan control
to turn off the A/C. To clear windows better in defog or
defrost modes, the A/C compressor runs automatically
in damp cool conditions.
h(Auto Recirculation):If AUTO is selected on
either the fan or mode control, the system automatically
controls the supply of fresh outside air or recirculates the
interior air to cool the car faster. The indicator light on
the recirculation button will light whenever the system
switches to recirculation. You may force outside air by
pressing the outside air button. The next time AUTO fan
or mode is selected, it will reset back to AUTO operation.
Manual Operation
9(Off):Turns the climate control system off. Outside
air still enters the vehicle and is directed to the oor.
The airow direction and temperature can be adjusted.
If the temperature is adjusted while the system is
off, the display will light to show the current settings.
wx(Driver Temperature Controls):Press
these buttons next to the fan control to increase
or decrease the temperature inside the vehicle.
wx(Passenger Temperature Controls):Press
these buttons next to the mode control to increase
or decrease the temperature for the front passenger.
If the passenger climate control system is off, pressing
one of these buttons turns it on.
9(Fan Control):Turn clockwise or counterclockwise
to increase or decrease the fan speed. Turning this
control completely counterclockwise turns on the
automatic fan operation.
If the airow seems low when the fan speed is at the
highest setting, the passenger compartment air lter
may need to be replaced. For more information,
seePassenger Compartment Air Filter on page 3-30
andScheduled Maintenance on page 6-4.
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Air Delivery Mode Control:Turn clockwise or
counterclockwise to change the direction of the airow
in the vehicle.
To change the current mode, select one of the following:
F(Vent):Air is directed to the instrument panel
outlets.
*(Bi-Level):Air is divided between the instrument
panel outlets and the oor outlets. In automatic operation,
cooler air is directed to the upper outlets and warmer air
to the oor outlets.
7(Floor):Air is directed to the oor outlets, with some
air directed to the windshield and side window outlets.
If recirculation is selected while in this mode, it stays on
for three minutes to reduce windshield fogging.
W(Floor/Defog):This mode clears the windows of
fog or moisture. Air is directed to the oor outlets, with
some air directed to the windshield and side window
outlets. The system turns off recirculation and runs
the air-conditioning compressor unless the outside
temperature is at or below freezing. The recirculation
mode cannot be selected while in the oor/defog mode.
0(Defrost):This mode removes fog or frost from the
windshield more quickly. Air is directed to the windshield
and the side window outlets. The system automatically
turns off recirculation and runs the air-conditioning
compressor, unless the outside temperature is at or
below freezing. Recirculation cannot be selected while
in the defrost mode.
#(Air Conditioning):Press to turn the air conditioning
system on or off and override the automatic system.
An indicator light below the button comes on to
show that this mode is on.
The air conditioning system removes moisture from the
air, so a small amount of water might drip under the
vehicle while idling or after turning off the engine.
This is normal.
:(Outside Air):Press to let outside air enter the
vehicle. An indicator light comes on to show this mode
is on. Pressing
?cancels this mode.
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?(Recirculation):Press to turn the recirculation
mode on. An indicator light below the button comes on to
show that this mode is on. This mode recirculates and
helps to quickly cool the air inside the vehicle. It can be
used to prevent outside air and odors from entering the
vehicle. This mode cannot be selected while in the defog
or defrost modes. If you try to select the recirculation
mode, the indicator light ashes three times and turns off.
Operation in this mode during periods of high humidity
and cool outside temperatures may result in increased
window fogging. If window fogging is experienced, select
the defrost mode.
PASS (Passenger Climate Control):Press to turn the
passenger climate control systems on or off.
When the passenger climate control system is on, the
passenger temperature setting is displayed.
If the PASS button is pressed to turn the passenger
temperature setting off, the driver temperature setting
controls the temperature for the entire vehicle.Sensors
The solar sensor, located in the defrost grille, in the
middle of the instrument panel, monitors the solar
radiation. Do not cover the solar sensor or the system
will not work properly.
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There is also an interior temperature sensor located
next to the steering wheel that measures the
temperature of the air inside the vehicle.
There is also an exterior temperature sensor located
behind the front grille. This sensor reads the outside air
temperature and helps maintain the temperature inside
the vehicle. Any cover on the front of the vehicle could
cause a false temperature reading to display.
In order to prevent false temperature readings at
startup, the displayed temperature will not change
until the following occurs:
Vehicle speed is above 10 mph (16 km/h) for
ve minutes.
Vehicle speed is above 32 mph (51 km/h) for
two and a half minutes.
The climate control system uses the information
from these sensors to maintain your comfort setting by
adjusting the outlet temperature, fan speed, and the air
delivery mode. The system may also supply cooler air to
the side of the vehicle facing the sun. The recirculation
mode will also be used as needed to maintain cool outlet
temperatures.
Rear Window Defogger
The rear window defogger uses a warming grid to
remove fog or frost from the rear window.
<(Rear Defogger):Press to turn the rear window
defogger on or off. An indicator light below the button
comes on to show that the rear window defogger is on.
Be sure to clear as much snow from the rear window
as possible.
The rear window defogger only works when the ignition
is in ON/RUN. The rear window defogger stays on
for about 20 minutes after the button is pressed if the
vehicle is traveling at slower vehicle speeds. At higher
vehicle speeds the rear window defogger may stay on
continuously. If turned on again, the defogger only runs
for about 10 minutes before turning off. The defogger can
be turned off by pressing the button again, by turning the
ignition to ACC/ACCESSORY or ON/RUN, or by turning
off the engine.
The heated outside rearview mirrors will heat to help
clear fog or frost from the surface of the mirror when
the rear window defogger is on. SeeOutside Heated
Mirrors on page 2-37for more information.
Notice:Do not use a razor blade or sharp object to
clear the inside rear window. Do not adhere anything
to the defogger grid lines in the rear glass. These
actions may damage the rear defogger. Repairs
would not be covered by your warranty.
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Outlet Adjustment
Use the levers, located in the middle of the front
outlets, to change the direction of the airow. Use the
thumbwheel located between the outlets to turn them
on and off.
If the vehicle has rear seat outlets, adjust the direction
of the airow using the lever in the center of each outlet.
Operation Tips

Clear away any ice, snow, or leaves from the air
inlets at the base of the windshield that could
block the ow of air into the vehicle.
Use of non-GM approved hood deectors can
adversely affect the performance of the system.
Keep the path under the front seats clear of objects
to help circulate the air inside the vehicle better.
Passenger Compartment Air Filter
Outside air is routed through a passenger compartment
air lter before entering the vehicle. This lter removes
certain particles from the air, including pollen and dust
particles. The lter should be replaced as part of routine
scheduled maintenance. SeeScheduled Maintenance
on page 6-4for when to replace the lter.
The access panel for the passenger compartment air
lter is located under the hood near the windshield,
on the passenger’s side of the vehicle.
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To access the passenger compartment air lter, do the
following:
1. Press the tabs back and left to remove the cover.
2. Insert a tool behind the push pin located on the
inboard side of the air lter compartment to
carefully pry the pin out.3. To remove the air lter, insert a tool between the air
lter and the compartment wall on the outboard side
of the vehicle. Then, push in to atten the pin holding
the air lter in place. Gently remove the air lter and
any loose debris that may be inside the air lter
compartment.
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4. Insert the new air lter by pushing until you hear a
click. Reinstall the push pin and snap the cover
into place.
Warning Lights, Gages, and
Indicators
Warning lights and gages can signal that something is
wrong before it becomes serious enough to cause an
expensive repair or replacement. Paying attention to
the warning lights and gages could prevent injury.
Warning lights come on when there may be or is a
problem with one of the vehicle’s functions. Some
warning lights come on briey when the engine is
started to indicate they are working.
Gages can indicate when there may be or is a problem
with one of the vehicle’s functions. Often gages and
warning lights work together to indicate a problem with
the vehicle.
When one of the warning lights comes on and stays on
while driving, or when one of the gages shows there may
be a problem, check the section that explains what to do.
Follow this manual’s advice. Waiting to do repairs can be
costly and even dangerous.
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