2011 BUICK LACROSSE air condition

Black plate (35,1)Buick LaCrosse Owner Manual - 2011
Instruments and Controls 5-35
TRUNK OPEN
This message will display when
the trunk is open. Close the trunk
completely.
Engine Cooling System
Messages
A/C OFF DUE TO HIGH
ENGINE TEMP
This message displays when
the engine coolant becomes
hotter than the normal operating
temperature. To avoid added
strain on a hot engine, the
air conditioning compressor
automatically turns off. When
the coolant temperature returns
to normal, the air conditioning
compressor turns back on.
You can continue to drive
the vehicle.
If this message continues to appear,
have the system repaired by your
dealer as soon as possible to avoid
damage to the engine.
COOLANT LEVEL LOW ADD
COOLANT
This message will display if the
coolant is low. SeeEngine Coolant
on page 10‑18.
ENGINE OVERHEATED —
IDLE ENGINE
This message displays when the
engine coolant temperature is too
hot. Stop and allow the vehicle to
idle until it cools down.
ENGINE OVERHEATED —
STOP ENGINE
This message displays and a
continuous chime sounds if the
engine cooling system reaches
unsafe temperatures for operation.
Stop and turn off the vehicle as
soon as it is safe to do so to avoid
severe damage. This message
clears when the engine has cooled
to a safe operating temperature.
HIGH COOLANT
TEMPERATURE
This message displays if the coolant
temperature is hot. See Engine
Overheating on page 10‑21.
Engine Oil Messages
CHANGE ENGINE OIL SOON
This message displays when the
engine oil needs to be changed.
When you change the engine oil,
be sure to reset the Oil Life System.
See Engine Oil Life System on
page 10‑13 andDriver Information
Center (DIC) on page 5‑25 for
information on how to reset the
system. See Engine Oil on
page 10‑9 andScheduled
Maintenance on page 11‑2
for more information.

Black plate (38,1)Buick LaCrosse Owner Manual - 2011
5-38 Instruments and Controls
Anti-Theft Alarm System
Messages
THEFT ATTEMPTED
This message displays if the vehicle
detects a tamper condition.
Tire Messages
TIRE PRESSURE LOW ADD
AIR TO TIRE
On vehicles with the Tire Pressure
Monitor System (TPMS), this
message displays when the
pressure in one or more of
the vehicle's tires is low.
The low tire pressure warning
light will also come on. SeeTire
Pressure Light on page 5‑23.
If a tire pressure message appears
on the DIC, stop as soon as you
can. Inflate the tires by adding air
until the tire pressure is equal to
the values shown on the Tire
and Loading Information label. See
Tires on page 10‑46, Vehicle
Load Limits on page 9‑12, and Tire
Pressure on page 10‑54.
You can receive more than one
tire pressure message at a time.
To read the other messages that
may have been sent at the same
time, press the SET/CLR button.
The DIC also shows the tire
pressure values. See Driver
Information Center (DIC) on
page 5‑25.SERVICE TIRE MONITOR
SYSTEM
This message displays if there is
a problem with the Tire Pressure
Monitor System (TPMS). See Tire
Pressure Monitor Operation on
page 10‑57 for more information.
TIRE LEARNING ACTIVE
This message displays when
the system is learning new tires.
SeeTire Pressure Monitor
Operation on page 10‑57 for
more information.
Transmission Messages
SERVICE TRANSMISSION
This message displays if there is
a problem with the transmission.
See your dealer.
SHIFT TO PARK
This message displays when the
transmission needs to be shifted to
P (Park). This may appear when
attempting to remove the key if the
vehicle is not in P (Park).
TRANSMISSION HOT —IDLE
ENGINE
This message displays and a chime
sounds if the transmission fluid in
the vehicle gets hot. Driving with the
transmission fluid temperature high
can cause damage to the vehicle.
Stop the vehicle and let it idle to
allow the transmission to cool.
This message clears when the fluid
temperature reaches a safe level.

Black plate (1,1)Buick LaCrosse Owner Manual - 2011
Climate Controls 8-1
Climate Controls
Climate Control Systems
Automatic Climate ControlSystem . . . . . . . . . . . . . . . . . . . . . . 8-1
Dual Automatic Climate Control System . . . . . . . . . . . . . . . . . . . . . . 8-4
Air Vents
Air Vents . . . . . . . . . . . . . . . . . . . . . . 8-8
Maintenance
Air Intake . . . . . . . . . . . . . . . . . . . . . 8-8
Passenger Compartment AirFilter . . . . . . . . . . . . . . . . . . . . . . . . . 8-8
Climate Control Systems
Automatic Climate Control System
For vehicles with this system, it controls the heating, cooling, and ventilation.
A. Power
B. Temperature Control
C. Fan Control
D. Air Delivery Mode Control
E. Recirculation F. AUTO
G. Defrost
H. Air Conditioning
I. Rear Window Defogger

Black plate (2,1)Buick LaCrosse Owner Manual - 2011
8-2 Climate Controls
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 the AUTO indicator light is
on, the system is in full automatic
operation. If the air delivery mode,
fan speed, recirculation, or air
conditioning setting is adjusted,
the AUTO indicator turns off and
the selected settings will appear
on the display.
To place the system in automatic
mode do the following:
1. Press AUTO.
2. Set the temperature. Allow thesystem time to stabilize. Adjust
the temperature as needed for
best comfort.
Q/R(Temperature Control):
Press to increase or decrease the
temperature. Manual Operation
O(Power):
Press to turn the fan
on or off.
D C(Fan Control): Press to
increase or decrease the fan speed.
The fan speed setting appears
on the main display. Pressing
either button cancels automatic
fan control and the fan can be
controlled manually. Press AUTO
to return to automatic operation.
e *(Air Delivery Mode
Control): Press to change the
direction of the airflow. The current
mode appears in the display screen.
Pressing either button cancels
automatic air delivery control and
the direction of the airflow can be
controlled manually. Press AUTO
to return to automatic operation.
To change the current mode, select
one of the following:
Y(Vent): Air is directed to the
instrument panel outlets.
\(Bi-Level): Air is divided
between the instrument panel
outlets and the floor outlets.
C(Tri‐Level): Air is divided
between the windshield, instrument
panel, and floor outlets.
[(Floor): Air is directed to the
floor outlets.
-(Defog): Clears the windows of
fog or moisture. Air is directed to the
windshield and floor outlets.
0(Defrost): Clears the
windshield of fog or frost more
quickly. Air is directed to the
windshield. Selecting defrost
will disable automatic control.
For best results, clear all snow
and ice from the windshield before
defrosting.
#(Air Conditioning): Press to
turn the air conditioning system
on or off. If the fan is turned off or
the outside temperature falls below
freezing, the air conditioning system
will not run.

Black plate (3,1)Buick LaCrosse Owner Manual - 2011
Climate Controls 8-3
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.
>(Recirculation):Press to
alternate between recirculating
air inside the vehicle or pulling in
outside air. When the indicator light
is on, air is being recirculated inside
the vehicle. This helps to quickly
cool the air inside the vehicle or
prevent outside air and odors from
entering.
Pressing this button cancels
automatic recirculation. Press AUTO
to return to automatic operation and
recirculation runs automatically as
needed.
Rear Window Defogger
=(Rear Window Defogger):
Press to turn the rear window
defogger on or off.
The rear window defogger
turns off automatically after
about 10 minutes. If turned on
again it runs for about five minutes
before turning off. The defogger
can also be turned off by turning
the ignition to ACC/ACCESSORY
or LOCK/OFF.
The rear window defogger can
be set to automatic operation.
See “Climate and Air Quality”
under Vehicle Personalization on
page 5‑39. When auto rear defog is
selected, the rear window defogger
turns on automatically when the
interior temperature is cold and
the outside temperature is about
4°C (40°F) and below. The auto
rear defogger turns off automatically
after about 10 minutes, or after
five minutes if the outside
temperature is not as cold. For vehicles with heated outside
rearview mirrors, they turn on when
the rear window defogger button
is on and help to clear fog or frost
from the surface of the mirror.
See
Heated Mirrors on page 2‑17.
Notice: Do not try to clear frost
or other material from the inside
of the front windshield and rear
window with a razor blade or
anything else that is sharp. This
may damage the rear window
defogger grid and affect your
radio's ability to pick up stations
clearly. The repairs wouldn't be
covered by your warranty.
Remote Start Climate Control
Operation: For vehicles with the
remote vehicle start feature, the
climate control system may run
when the vehicle is started remotely.
The system uses the driver's
previous settings to heat or cool the
inside of the vehicle. See Remote
Vehicle Start on page 2‑8.
The rear window defogger turns on
if it is cold outside.

Black plate (4,1)Buick LaCrosse Owner Manual - 2011
8-4 Climate Controls
Sensor
The solar sensor, located on top
of the instrument panel near the
windshield, monitors the solar heat.
The climate control system uses
the sensor information to adjust
the temperature, fan speed,
recirculation, and air delivery
mode for best comfort.
Do not cover the sensor or the
automatic climate control system
may not work properly.
Dual Automatic Climate Control System
For vehicles with this system, it controls the heating, cooling, and ventilation.
A. Power
B. Driver Temperature Control
C. Defrost
D. Fan Control
E. Air Delivery Mode Control
F. Recirculation/AutomaticRecirculation G. Passenger Temperature Control
H. AUTO
I. Rear Window Defogger
J. Heated Steering Wheel
K. Air Conditioning
L. ZONE

Black plate (5,1)Buick LaCrosse Owner Manual - 2011
Climate Controls 8-5
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 the AUTO indicator light is
on, the system is in full automatic
operation. If the air delivery mode,
fan speed, recirculation, or air
conditioning setting is adjusted,
the AUTO indicator turns off and
the selected settings will appear
on the display.
To place the system in automatic
mode do the following:
1. Press AUTO.
2. Set the temperature. Allow thesystem time to stabilize. Adjust
the temperature as needed for
best comfort.QTEMPR(Driver and
Passenger Temperature
Control): The temperature
can be adjusted separately for
the driver and the passenger.
Press to increase or decrease
the temperature.
ZONE: Press to link all climate
zone settings to the driver's
settings. The ZONE indicator light
will turn off. When the passenger
settings are adjusted, the ZONE
indicator light is on.
Manual Operation
O(Power): Press to turn the fan off
or on.
D C(Fan Control): Press to
increase or decrease the fan speed.
The fan speed setting appears on
the main display. Pressing either
button cancels automatic fan control
and the fan is controlled manually.
Press AUTO to return to automatic
operation.
e *(Air Delivery Mode
Control): Press to change
the direction of the airflow.
The current mode appears in
the display screen. 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 of the following:
Y(Vent): Air is directed to the
instrument panel outlets.
\(Bi-Level): Air is divided
between the instrument panel
outlets and the floor outlets.
C(Tri‐Level): Air is divided
between the windshield, instrument
panel, and floor outlets.
[(Floor): Air is directed to the
floor outlets.
-(Defog): Clears the windows of
fog or moisture. Air is directed to the
windshield and floor outlets.

Black plate (6,1)Buick LaCrosse Owner Manual - 2011
8-6 Climate Controls
0(Defrost):Clears the
windshield of fog or frost more
quickly. Air is directed to the
windshield.
For best results, clear all snow and
ice from the windshield before
defrosting.
#(Air Conditioning): Press to
turn the air conditioning system on
or off. If the fan 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.
>//(Recirculation/Auto
Recirculation): Press to change to
automatic control of air recirculation
inside the vehicle. When the auto
recirculation indicator light is on,
the air is automatically recirculated
as needed to help quickly cool the
air inside the vehicle.
In auto recirculation control, the
Air Quality Control system may
operate when pollution is detected.
To adjust the sensitivity of the
Air Quality Control, see “Climate
and Air Quality” underVehicle
Personalization on page 5‑39.
When the
>indicator light is on,
air is recirculated inside the vehicle.
If both indicator lights are off,
outside air will flow into the vehicle.
Press AUTO or
/to return to
automatic operation. 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. To turn Auto
Defog off or on, see “Climate
and Air Quality” underVehicle
Personalization on page 5‑39.