2007 BUICK LACROSSE air condition

Defogging and Defrosting
Fog on the inside of windows is a result of high
humidity (moisture) condensing on the cool window
glass. This can be minimized if the climate
control system is used properly. There are
two modes to clear fog or frost from your
windshield. Use the oor/defog mode to clear the
windows of fog or moisture and warm the
passengers. Use defrost to remove fog or frost
from the windshield more quickly.
-(Floor/Defog):Press this button to direct the
air between the windshield, oor outlets and
side windows. When you select this mode, the
system turns recirculation off and runs the
air conditioning compressor unless the outside
temperature is near or below freezing. Pressing
the recirculation button will have no effect
other than turning on the indicator light while in
oor/defog mode.
1(Defrost):Press this button to direct most of
the air to the windshield, with some air directed to
the side windows. In this mode, the system will
automatically turn off the recirculation and run the
air conditioning compressor, unless the outside
temperature is near or below freezing. Pressing the
recirculation button will have no effect other than
turning on the indicator light while in defrost mode.
Do not drive the vehicle until all windows are clear.
Sensors
The solar sensor on the vehicle monitors the solar
heat and the air inside of the vehicle. This
information is used to maintain the selected
temperature by initiating needed adjustments to the
temperature, the fan speed, and the air delivery
system. The system may also supply cooler air to
the side of the vehicle facing the sun. The
recirculation mode will also be activated, as
necessary. Do not cover the solar sensor located in
the center of the instrument panel, near the
windshield, or the system will not work properly.
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Passenger Compartment Air Filter
The passenger compartment air lter is located in
the engine compartment below the air inlet
grille, near the passenger’s side windshield wiper
arm. SeeEngine Compartment Overview on
page 350.
The lter traps most of the pollen from the air
entering the air conditioning module. Like
the engine’s air cleaner lter, it needs to be
changed periodically to keep the air conditioning
working at its best. For information on how often to
change the passenger compartment air lter,
seeScheduled Maintenance on page 462.
To change the passenger compartment air lter,
use the following steps:
1. Turn the ignition to ACCESSORY and turn the
windshield wipers on.
2. Turn the ignition to OFF when the windshield
wipers are in the upright position.
3. Raise the hood.
4. Disconnect the windshield washer pump hose
from the fender rail and air inlet grille.5. Peel back the hood weather-strip from the
passenger’s side of the vehicle halfway to
the center of the hood.
6. Remove the three air inlet grille retainers.
7. Remove the air inlet grille.
8. Remove the water deector panel.
9. Remove the old air
lter by pulling up
on its tab.
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SeePassenger Sensing System on page 75for
more on this, including important safety
information.
If, after several seconds, all status indicator lights
remain on, or if there are no lights at all, there
may be a problem with the lights or the passenger
sensing system. See your dealer for service.
{CAUTION:
If the off indicator and the airbag
readiness light ever come on together, it
means that something may be wrong with
the airbag system. If this ever happens,
have the vehicle serviced promptly,
because an adult-size person sitting in the
right front passenger seat may not have
the protection of the frontal airbag. See
Airbag Readiness Light on page 182.
Charging System Light
This light comes on
briey when the ignition
is turned on, as a
check to show that it is
working. Then it
should go out.
If it stays on, or comes on while the vehicle is being
driven, a chime will sound and there may be a
problem with the charging system. It could indicate
that the vehicle has a loose accessory belt or
another electrical problem. Have it checked right
away. Driving while this light is on could drain the
battery and result in the engine suddenly stopping.
If the vehicle must be driven a short distance with
the light on, be certain to turn off all unnecessary
electrical loads, such as the radio, heater fan,
air conditioning fan, and heated seats.
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Notice:If you keep driving your vehicle
with this light on, after awhile, your emission
controls may not work as well, your fuel
economy may not be as good, and your engine
may not run as smoothly. This could lead to
costly repairs that may not be covered by
your warranty.
Notice:Modications made to the engine,
transaxle, exhaust, intake, or fuel system
of your vehicle or the replacement of the
original tires with other than those of the same
Tire Performance Criteria (TPC) can affect
your vehicle’s emission controls and may
cause this light to come on. Modications to
these systems could lead to costly repairs not
covered by your warranty. This may also
result in a failure to pass a required Emission
Inspection/Maintenance test. SeeAccessories
and Modifications on page 341.This light should come on, as a check to show
you it is working, when the ignition is on and the
engine is not running. If the light does not
come on, have it repaired. This light will also
come on during a malfunction in one of two ways:
Light Flashing— A misre condition has
been detected. A misre increases vehicle
emissions and may damage the emission
control system on your vehicle. Diagnosis and
service may be required.
Light On Steady— An emission control
system malfunction has been detected on your
vehicle. Diagnosis and service may be
required.
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DIC Warnings and Messages
Messages are displayed on the uplevel DIC to
notify the driver that the status of the vehicle has
changed and that some action may be needed
by the driver to correct the condition. Multiple
messages may appear one after another.
Some messages may not require immediate
action, but you can press any of the DIC buttons
on the uplevel vehicle to acknowledge that
you received the message and clear it from the
DIC display.
Some messages cannot be cleared from the DIC
display because they are more urgent. These
messages require action before they can be
cleared.
If there are any active warning messages when
the vehicle is turned off, two chimes sound and the
DIC goes into a reminder mode. The reminder
mode displays any active message. If there
are multiple messages, the DIC displays each
message for ve seconds. After each active
message is displayed once, the reminder mode
turns off.You should take any messages that appear on the
display seriously and remember that clearing
the messages will only make the messages
disappear, not correct the problem.
The following are the possible messages that can
be displayed and some information about them.
A/C OFF FOR ENGINE PROTECTION
This message displays when the engine coolant
becomes hotter than the normal operating
temperature. SeeEngine Coolant Temperature
Gage on page 189. To avoid added strain on a hot
engine, the air conditioning compressor is
automatically turned off. When the coolant
temperature returns to normal, the air conditioning
compressor turns back on. You can continue to
drive your vehicle.
This message comes on while the ignition is in
RUN. Press any of the DIC buttons to acknowledge
this warning message and to clear it from the
screen.
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This message continues to display for two seconds
if it has not been acknowledged when the engine is
turned off. It also re-displays for two seconds if the
message has been acknowledged, but the
condition still exists when the engine is turned off.
If the condition still exists, the message re-appears
when the engine is turned on. If this message
continues to appear, have the system repaired by
your dealer as soon as possible to avoid
damage to the engine.
BATTERY SAVER ACTIVE
This message displays when the system detects
that the battery voltage is dropping beyond a
reasonable level. The battery saver system starts
reducing certain features of the vehicle that
you may be able to notice. At the point that the
features are disabled, this message is displayed.
It means that the vehicle is trying to save the
charge in the battery.
Turn off all unnecessary accessories to allow the
battery to recharge.
The normal battery voltage range is 11.5 to
15.5 volts. If your vehicle has an uplevel DIC, you
can monitor the battery voltage by pressing the
gages button until BATTERY displays.
CHANGE OIL SOON
This message displays when service is required
for the vehicle. See your dealer. SeeEngine Oil on
page 353andScheduled Maintenance on
page 462for more information.
The CHANGE OIL SOON message is reset by
acknowledging the message. The OIL LIFE screen
under the gages menu on the DIC must also be
reset. See “Oil Life” underDIC Operation and
Displays on page 200andEngine Oil Life System
on page 356.
This message displays while the ignition is in RUN.
Press any of the DIC buttons to acknowledge this
message and to clear it from the screen.
This message continues to display for two seconds
if it has not been acknowledged when the engine is
turned off. It also re-displays for two seconds if the
message has been acknowledged, but the
condition still exists when the engine is turned off.
If the condition still exists, the message re-appears
when the engine is turned on.
209

ENGINE COOLANT HOT
Notice:If you drive your vehicle while the
engine is overheating, severe engine damage
may occur. If an overheat warning appears
on the instrument panel cluster and/or
DIC, stop the vehicle as soon as possible.
Do not increase the engine speed above
normal idling speed. SeeEngine Overheating
on page 367for more information.
This message displays when the engine coolant
temperature is too hot. The engine coolant
temperature warning light also appears on the
instrument panel cluster. SeeEngine Coolant
Temperature Warning Light on page 188
andEngine Coolant Temperature Gage on
page 189for more information.
To avoid added strain on the engine, turn off the
air conditioner if it is on. When the coolant
temperature returns to normal, the air conditioner
can be turned back on.
This message displays only when the ignition is in
RUN. A chime sounds continuously when this
message is displayed. Press any of the DIC
buttons to acknowledge this message and to clear
it from the screen.This message continues to display for two seconds
if it has not been acknowledged when the engine is
turned off. It also re-displays for two seconds if the
message has been acknowledged, but the
condition still exists when the engine is turned off.
If the condition still exists, the message re-appears
when the engine is turned on.
HEADLAMPS SUGGESTED
This message displays when the amount of
available light outside of the vehicle is low, or the
windshield wipers have been on for about
30 seconds, and the exterior lamps control is off
or in the parking lamps position. This message
informs the driver that turning on the exterior lamps
is recommended. SeeExterior Lamps on
page 158for more information.
This message displays while the ignition is in RUN.
Press any of the DIC buttons to acknowledge this
message and to clear it from the screen.
213

XM Radio Messages
If you have a radio with CD (MP3), or a radio with a Six-Disc CD, you will receive these radio messages.
Radio Display Message Condition Action Required
XL (Explicit Language
Channels)XL on the radio display,
after the channel name,
indicates content with
explicit language.These channels, or any others, can be blocked at a
customer’s request, by calling 1-800-852-XMXM (9696).
Updating Updating encryption code The encryption code in the receiver is being updated, and
no action is required. This process should take no longer
than 30 seconds.
No Signal Loss of signal The system is functioning correctly, but the vehicle is in a
location that is blocking the XM™ signal. When the vehicle
is moved into an open area, the signal should return.
Loading XM Acquiring channel audio
(after 4 second delay)The radio system is acquiring and processing audio and
text data. No action is needed. This message should
disappear shortly.
CH Off Air Channel not in service This channel is not currently in service. Tune to
another channel.
CH Unavail Channel no
longer availableThis previously assigned channel is no longer assigned.
Tune to another station. If this station was one of the
presets, choose another station for that preset button.
No Info Artist Name/Feature
not availableNo artist information is available at this time on this channel.
The system is working properly.
278