light BUICK LACROSSE 2007 Workshop Manual

Defogging and Defrosting
Fog on the inside of the vehicle is a result of high
humidity causing moisture to condense on the
cool window glass. This can be minimized if the
climate control system is used properly. There are
two modes to clear frost or fog from the windshield.
Use the defog mode to clear the windows of
condensation and to warm the vehicle’s occupants.
Use the defrost mode to remove frost or
condensation from the windshield quickly.
See “Rear Window Defogger” later in this section
for information on clearing the rear window of
fog or ice.
Turn the right knob to select the defog or
defrost mode.
Do not drive the vehicle until all windows
are clear.
-(Defog):This mode directs half of the air to the
windshield and the side window outlets and half to
the oor outlets. 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 defog mode.
0(Defrost):This mode directs most of the air to
the windshield and the side window outlets, with
some air directed to the oor outlets. 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 defrost mode.
171

Rear Window Defogger
The rear window defogger uses a warming grid to
remove fog from the rear window.
<(Rear):Press the button to turn the rear
window defogger on or off. An indicator light below
the button will come on to let you know that the
rear window defogger is activated.
The rear window defogger will only work when the
ignition is in RUN. The rear window defogger
will stay on for about 20 minutes after the button is
pressed. If turned on again, the defogger will
only run for about 20 minutes before turning off.
The defogger can also be turned off by pressing
the button again or by turning off the engine.
Do not drive the vehicle until all windows are clear.
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 your 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 you can control the heating,
cooling, and ventilation for the vehicle.
172

This control has four types of operation.
Automatic can set/change the temperature
only. AUTO and temperature only will
appear on the display.
Semi-Automatic Fan can set/change the
temperature and mode. The fan operates
automatically. The temperature and mode will
appear on the display.
Semi-Automatic Mode can set/change the
temperature and fan speed. The mode
operates automatically. The fan speed and
temperature will appear on the display.
Manual can set/change the temperature,
mode and fan. The fan speed, temperature,
and mode will appear on the display.
If your vehicle has the remote start feature, the
climate control system will automatically regulate
the inside temperature of your vehicle when
the remote start system is activated. Normal
operation and the last setting of the climate control
system will return after the key is turned on.
Manual Operation
During daylight hours, the instrument panel
brightness control might need to be adjusted to
the highest setting, in order to see the indicator
lights for the various climate control settings.
OFF:Press this button to turn the climate control
system off.
yz(Temperature):Press these buttons to
manually adjust the temperature inside the vehicle.
Press the up arrow on the driver or passenger
side to raise the temperature, and press the down
arrow to lower the temperature. The display will
show the selected temperature.
z9(Fan):Press this button to decrease the fan
speed. Pressing the arrows cancels the automatic
operation and places the system in manual or
semi-automatic mode. Press the AUTO button to
return to automatic operation. If the airow seems
low when the fan is at the highest setting, the
passenger compartment air lter may need to be
replaced. For more information seePassenger
Compartment Air Filter on page 178andScheduled
Maintenance on page 462.
174

9y(Fan):Press this button to increase the fan
speed. Pressing the arrows cancels the automatic
operation and places the system in manual or
semi-automatic mode. Press the AUTO button to
return to automatic operation. If the airow
seems low when the fan is at the highest setting,
the passenger compartment air lter may need
to be replaced. For more information see
Passenger Compartment Air Filter on page 178
andScheduled Maintenance on page 462.
6(Floor):This mode directs most of the air to
the oor, with some air directed to the side window
outlets and a small amount to the windshield.
)(Bi-Level):This setting directs airow to the
instrument panel and oor outlets. A small amount
of air is also directed to the windshield and the
side window outlets.
Y(Vent):This mode directs air through the
instrument panel outlets.
h(Recirculation):Press this button to turn
recirculation mode on or off. This mode keeps
outside air from coming into the vehicle. It can be
used to help reduce the outside air and odors
that enter your vehicle or help cool the air inside
the vehicle quicker.
Recirculation is not available while in the oor,
defrost, or oor/defog modes. Using recirculation
for long periods of time may cause the air
inside your vehicle to become too dry.
Recirculation mode has a ve minute timer after
which the system allows for some fresh outside air
into the vehicle to maintain interior air quality.
#(Air Conditioning):Press this button to turn
the air conditioning compressor on and off.
The indicator light on the button will come on
when the air conditioning is on. The indicator light
will change with each button press even when
conditions prevent operation.
((Heated Seats):Press this button to turn the
driver or passenger heated seats on and off. See
Heated Seats on page 10for additional information.
175

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.
176

10. Install a new passenger compartment air lter.
SeeNormal Maintenance Replacement Parts
on page 471for the type of lter to use.
Make sure it slides under the compartment
retainers.
11. Reverse Steps 1 through 8.
For best climate control performance,
re-installation of a clean air lter is required.
Warning Lights, Gages,
and Indicators
This part describes the warning lights and gages
that may be on the vehicle. The pictures will
help you locate them.
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 also
save you or others from injury.Warning lights come on when there may be or is a
problem with one of the vehicle’s functions. As
you will see in the details on the next few pages,
some warning lights come on briey when you
start the engine just to let you know they are
working. If you are familiar with this section, you
should not be alarmed when this happens.
Gages can indicate when there may be or is a
problem with one of your vehicle’s functions. Often
gages and warning lights work together to let
you know when there is a problem with your
vehicle.
When one of the warning lights comes on and
stays on when you are driving, or when one of the
gages shows there may be a problem, check
the section that tells you what to do about
it. Please follow this manual’s advice. Waiting to
do repairs can be costly – and even dangerous. So
please get to know the warning lights and gages.
They are a big help.
179

Speedometer and Odometer
Your speedometer lets you see your speed
in both miles per hour (mph) and kilometers
per hour (km/h).
Your vehicle’s odometer works together with the
driver information center. You can set a Trip A and
Trip B odometer. See “Trip Information” under
DIC Operation and Displays on page 200.
The odometer mileage can be checked without the
vehicle running. Simply press the odometer/trip
switch on the instrument panel cluster.
If your vehicle ever needs a new odometer
installed, the new one will be set to the correct
mileage total of the old odometer.
Tachometer
The tachometer displays the engine speed in
thousands of revolutions per minute (rpm).
Safety Belt Reminder Light
When the key is turned to RUN or START, a
chime will come on for several seconds to remind
people to fasten their safety belts, unless the
driver’s safety belt is already buckled.
The safety belt light will
also come on and stay
on for several
seconds, then it will
ash for several more.
This chime and light will be repeated if the driver
remains unbuckled and the vehicle is in motion.
If the driver’s belt is already buckled, neither
the chime nor the light will come on.
181

Passenger Safety Belt
Reminder Light
Several seconds after the key is turned to RUN or
START, a chime will sound for several seconds to
remind the front passenger to buckle their safety
belt. This would only occur if the passenger airbag
is enabled. SeePassenger Sensing System on
page 75for more information. The passenger
safety belt light will also come on and stay on for
several seconds, then it will ash for several more.
This chime and light will
be repeated if the
passenger remains
unbuckled and
the vehicle is in motion.
If the passenger’s safety belt is buckled, neither
the chime nor the light will come on.
Airbag Readiness Light
There is an airbag readiness light on the
instrument panel, which shows the airbag symbol.
The system checks the airbag’s electrical
system for malfunctions. The system check
includes the airbag modules, the wiring and the
crash sensing and diagnostic module. For
more information on the airbag system, seeAirbag
System on page 66.
This light will come on
when the vehicle is
started, and it will ash
for a few seconds. Then
the light should go out.
This means the system is functioning properly.
182

If the airbag readiness light stays on after the
vehicle is started, or comes on as the vehicle is
being driven, there may be an electrical problem
and the airbag system may not work properly.
Have the vehicle serviced right away.
{CAUTION:
If the airbag readiness light stays on after
you start your vehicle, it means the airbag
system may not be working properly. The
airbags in your vehicle may not inate in
a crash, or they could even inate without
a crash. To help avoid injury to yourself
or others, have your vehicle serviced right
away if the airbag readiness light stays on
after you start your vehicle.
The airbag readiness light should ash for a few
seconds when you turn the ignition key to RUN. If
the light does not come on then, have it xed
so it will be ready to warn you if there is a problem.
Passenger Airbag Status Indicator
Your vehicle has a passenger sensing system. The
passenger airbag status indicator on the instrument
panel will be visible when you turn your ignition key
to RUN or START. SeePassenger Sensing System
on page 75for more information.
The passenger airbag
status indicator will
light ON and OFF for
several seconds
as a system check.
If you use remote start to start your vehicle from a
distance, if your vehicle has this feature, you may
not see the system check. Then, after several more
seconds, the status indicator will light either ON or
OFF to let you know the status of the right front
passenger’s frontal airbag.
183

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.
185