2010 BUICK LACROSSE climate control

7-6 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 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
under Vehicle Personalization
on
page 4‑38.
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
under Vehicle Personalization
on
page 4‑38.

Climate Controls 7-7
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 5 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 4‑38. 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 40°F
and below. The auto rear defogger
turns off automatically after about
10 minutes, or after 5 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 helps to clear fog or frost
from the surface of the mirror. See
Heated Mirrors on page 1‑16.
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.((Heated Steering Wheel): For
vehicles with this feature, press to
turn on or off. See Heated Steering
Wheel on page 4‑7. 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 1‑8.
The rear window defogger turns on
if it is cold outside.
Sensors
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 sensors or the
automatic climate control system
may not work properly.

7-8 Climate Controls
Air Vents
Use the louvers located on the air
vents to change the direction of the
airflow.
To open the vent, move the
thumbwheel to
R. To close the vent,
move the thumbwheel to
(.
Operation Tips
.Keep all outlets open whenever
possible for best system
performance.
.Keep the path under all seats
clear of objects to help circulate
the air inside the vehicle more
effectively.
.Use of non-GM approved hood
deflectors can adversely affect
the performance of the system.
Maintenance
Air Intake
Clear away any ice, snow, or leaves
from the air intake at the base of the
windshield that can block the flow of
air into the vehicle.
Passenger Compartment
Air Filter
The filter removes dust, pollen, and
other airborne irritants from outside
air that is pulled into the vehicle.
The filter should be replaced as part
of routine scheduled maintenance.
See Scheduled Maintenance
on
page 10‑2for replacement
intervals. To find out what type of
filter to use, see Maintenance
Replacement Parts on page 10‑9. The passenger compartment air
filter can be accessed by removing
the entire glove box.
1. Open the passenger side door.
Remove the end cover located
on the side of the instrument
panel in the top right corner.
Remove the screw affixed to the
side of the glove box.
2. Open the glove box door and remove the attached screws
from around the glove box.
3. Lower the loosened glove box housing.
4. Unplug both wire cables and remove the glove box.
5. Pull the three tabs to release and open the filter door.

Climate Controls 7-9
6. Remove the old air filter.7. Install the new air filter.
8. Reinstall the air filter door.Re-install the glove box.
See your dealer/retailer if additional
assistance is needed.

7-10 Climate Controls
2@NOTES

8-10 Driving and Operating
TheAntilock Brake System (ABS)on page 8‑31improves vehicle
stability during hard stops on
slippery roads, but apply the brakes
sooner than when on dry pavement.
Allow greater following distance on
any slippery road and watch for
slippery spots. Icy patches can
occur on otherwise clear roads in
shaded areas. The surface of a
curve or an overpass can remain icy
when the surrounding roads are
clear. Avoid sudden steering
maneuvers and braking while
on ice.
Turn off cruise control, if equipped,
on slippery surfaces.Blizzard Conditions
Being stuck in snow can be in a
serious situation. Stay with the
vehicle unless there is help nearby.
If possible, use the Roadside
Assistance Program (US, Can)
on
page 12‑6. To get help and keep
everyone in the vehicle safe:
.Turn on the hazard warning
flashers.
.Tie a red cloth to an outside
mirror.
{WARNING
Snow can trap engine exhaust
under the vehicle. This may
cause exhaust gases to get
inside. Engine exhaust contains
carbon monoxide (CO) which
cannot be seen or smelled. It can
cause unconsciousness and even
death.
(Continued)
WARNING (Continued)
If the vehicle is stuck in the snow:
.Clear away snow from around
the base of your vehicle,
especially any that is blocking
the exhaust pipe.
.Check again from time to
time to be sure snow does
not collect there.
.Open a window about 5 cm
(two inches) on the side of
the vehicle that is away from
the wind to bring in fresh air.
.Fully open the air outlets on
or under the instrument
panel.
.Adjust the Climate Control
system to a setting that
circulates the air inside the
vehicle and set the fan speed
to the highest setting. See
Climate Control System in the
Index.(Continued)

9-64 Vehicle Care
Uniform Tire Quality
Grading
Quality grades can be found
where applicable on the tire
sidewall between tread shoulder
and maximum section width. For
example:
Treadwear 200 Traction AA
Temperature A
The following information relates
to the system developed by the
United States National Highway
Traffic Safety Administration
(NHTSA), which grades tires by
treadwear, traction, and
temperature performance. This
applies only to vehicles sold in
the United States. The grades
are molded on the sidewalls of
most passenger car tires. The
Uniform Tire Quality Grading
(UTQG) system does not apply
to deep tread, winter-type snow
tires, space-saver, or temporaryuse spare tires, tires with
nominal rim diameters of
25 to 30 cm (10 to 12 inches),
or to some limited-production
tires.
While the tires available on
General Motors passenger cars
and light trucks may vary with
respect to these grades, they
must also conform to federal
safety requirements and
additional General Motors Tire
Performance Criteria (TPC)
standards.
Treadwear
The treadwear grade is a
comparative rating based on the
wear rate of the tire when tested
under controlled conditions on a
specified government test
course. For example, a tire
graded 150 would wear one and
a half (1.5) times as well on the
government course as a tire
graded 100. The relative
performance of tires depends
upon the actual conditions of
their use, however, and may
depart significantly from the
norm due to variations in driving
habits, service practices, and
differences in road
characteristics and climate.
Traction
–AA, A, B, C
The traction grades, from
highest to lowest, are AA, A, B,
and C. Those grades represent
the tire's ability to stop on wet
pavement as measured under
controlled conditions on
specified government test
surfaces of asphalt and
concrete. A tire marked C may
have poor traction performance.

INDEX i-1
A
Accessories andModifications . . . . . . . . . . . . . . . . . . 9-3
Accessory Power . . . . . . . . . . . . . . 8-20
Adaptive Forward Lighting (AFL) . . . . . . . . . . . . . . . . . 5-3
Add-On Electrical
Equipment . . . . . . . . . . . . . . . . . . . 8-60
Adding Equipment to the Airbag-Equipped Vehicle . . . . . 2-38
Adjustments
Lumbar, Front Seats . . . . . . . . . . . 2-5
Air Cleaner/Filter, Engine . . . . . . 9-15
Air Filter, Passenger Compartment . . . . . . . . . . . . . . . . . 7-8
Air Intake . . . . . . . . . . . . . . . . . . . . . . . 7-8
Air Vents . . . . . . . . . . . . . . . . . . . . . . . 7-8
Airbag System
Check . . . . . . . . . . . . . . . . . . . . . . . . 2-39
How Does an AirbagRestrain? . . . . . . . . . . . . . . . . . . . 2-30
Passenger Sensing System . . . . . . . . . . . . . . . . . . . . . . 2-32 Airbag System (cont.)
What Makes an Airbag
Inflate? . . . . . . . . . . . . . . . . . . . . . . 2-30
What Will You See After
an Airbag Inflates? . . . . . . . . . . 2-30
When Should an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . . 2-28
Where Are the Airbags? . . . . . . 2-27
Airbags
Adding Equipment to theVehicle . . . . . . . . . . . . . . . . . . . . . . 2-38
Passenger Status Indicator . . . 4-16
Readiness Light . . . . . . . . . . . . . . 4-16
Servicing Airbag-Equipped Vehicles . . . . . . . . . . . . . . . . . . . . . 2-37
System Check . . . . . . . . . . . . . . . . 2-24
Alarm System Anti-Theft . . . . . . . . . . . . . . . . . . . . . 1-13
All-Wheel Drive . . . . . . . . . . . . . . . . 8-30
AM-FM Radio . . . . . . . . . . . . . . . . . . 6-12
Antenna Satellite Radio . . . . . . . . . . . . . . . . 6-19
Anti-Theft
Alarm System . . . . . . . . . . . . . . . . 1-13
Alarm System Messages . . . . . 4-37 Antilock Brake
System (ABS) . . . . . . . . . . . . . . . . 8-31
Warning Light . . . . . . . . . . . . . . . . . 4-21
Appearance Care Exterior . . . . . . . . . . . . . . . . . . . . . . . 9-82
Interior . . . . . . . . . . . . . . . . . . . . . . . . 9-86
Assistance Program,
Roadside . . . . . . . . . . . . . . . . . . . . . 12-6
Audio Players . . . . . . . . . . . . . . . . . 6-20 CD . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20
Audio System
Backglass Antenna . . . . . . . . . . . 6-19
Radio Reception . . . . . . . . . . . . . . 6-18
Theft-Deterrent Feature . . . . . . . . 6-2
Automatic Headlamp System . . . . . . . . . . . . . 5-3
Automatic Climate Control System . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Automatic Transmission . . . . . . . 8-27 Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . 9-15
Manual Mode . . . . . . . . . . . . . . . . . 8-29
Shiftlock Control SystemCheck . . . . . . . . . . . . . . . . . . . . . . . 9-27
Auxiliary Devices . . . . . . . . 6-28, 6-31