CADILLAC STS 2007 1.G Owners Manual

AUTO (Automatic):When this button is pressed
and the temperature is set, the system will
automatically control the inside temperature, the
air delivery mode, the air conditioning compressor,
and the fan speed. AUTO will appear on the
display next to the fan, mode indicators,
and recirculation indicator if your vehicle has a air
quality sensor.
1. Press the AUTO button.
2. Adjust the temperature to a comfortable
setting, generally, between 70°F (21°C)
and 80°F (27°C).
Choosing the coldest or warmest temperature
setting will not cause the system to heat or
cool any faster. If the system is set at
the warmest temperature setting, the system
will try to continuously heat the vehicle
and will not adjust the system down as the
vehicle warms up.In cold weather, the system can start at
reduced fan speeds to avoid blowing cold air
into the vehicle until warmer air is available.
The system starts out blowing air at the oor,
but can automatically change modes as
the vehicle warms up to maintain the chosen
temperature setting. The length of time
needed for warm up depends on the outside
temperature and the length of time that
has elapsed since the vehicle was last driven.
3. Wait for the system to regulate. This may take
from 10 to 30 minutes. Then adjust the
temperature, if necessary.
You can switch from English to metric units
through the Driver Information Center (DIC). See
DIC Controls and Displays on page 258.
The air-conditioning system removes moisture
from the air, so some water might drip underneath
the vehicle while idling or after turning off the
engine. This is normal.
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Manual Operation
yNz(Mode):Pressing the mode switch and
changing the mode cancels automatic operation
and allows the operator to manually select the air
delivery location. Press AUTO to return to
automatic operation.
The outboard air outlets always receive airow
regardless of the mode selected. SeeOutlet
Adjustment on page 237to change this airow
from the outboard outlets.
To change the current mode, select one of the
following:
Y(Vent):This mode directs air to the instrument
panel outlets.
\(Bi-Level):This mode directs about half of the
air to the instrument panel outlets, and then
directs most of the remaining air to the oor
outlets. In automatic operation, cooler air is
directed to the upper outlets and warmer air to the
oor outlets.
[(Floor):This mode directs most of the air to
the oor outlets with some air directed to the
outboard outlets, and a little air directed to
the windshield and side windows.The mode switch can also be used to select the
defog mode. Information on defogging and
defrosting can be found later in this section.
yAz(Fan):Press this switch to increase or
decrease the fan speed. Pressing this switch
cancels automatic operation and allows the
operator to manually select the amount of airow.
Press AUTO to return to automatic 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 239andScheduled Maintenance on
page 505.
h(Recirculation):Press this button to control
the air source for the climate control system. If
in AUTO mode, press this button once to
select recirculation. This mode keeps outside air
from coming in the vehicle and recirculates the air
in the vehicle. It can be used to prevent outside
air and odors from entering the vehicle or to
help cool the air inside the vehicle more quickly.
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Recirculation is not available in the defrost mode
and shuts off when defog mode is selected.
Both of these features are designed to limit fogging
in the vehicle. If recirculation is selected during
defog mode, it automatically turns off after
10 minutes to limit problems with fogging.
In some conditions, using recirculation for long
periods of time can cause the air inside the vehicle
to become too dry or stuffy. To prevent this from
happening, after the air in the vehicle has
cooled, select AUTO to return to automatic climate
control operation or push the recirculation button
again to select outside air.
Press this button a second time to select
outside air.
:(Outside Air):This mode forces the system
to pull air from outside the vehicle. It can be
used to bring fresh air into the vehicle.
Air Quality Sensor:Your vehicle could have an
air quality sensor to help limit the climate
control system from pulling in some harmfulexhaust fumes from older, poorly running, or
diesel-equipped vehicles that are driving near you.
This sensor, when active, monitors the air
quality in front of your vehicle and switches to air
recirculation when poor quality air is detected
outside your vehicle. Press the AUTO button on
the climate control to activate the air quality
sensor. The word AUTO comes on the center of
the climate control display. While the air quality
sensor senses poor quality air, the recirculation
graphic displays.
Under some conditions, the air quality sensor
system does not operate. In cold weather, the
system might not be active (even if AUTO is
displayed) because of concerns of fogging your
windows, which may occur by activating
recirculation mode. Also, the air quality sensor
system does not remain in recirculation mode for
extended periods of time that could cause stuffy or
very dry conditions in the vehicle. Following a
poorly running vehicle for an extended period of
time may not keep recirculation active indenitely.
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The air quality sensor does not activate due to
organic odors, like skunk, and may not activate on
many chemical-related odors. If you wish to limit
these types of odors, manually select recirculation.
Your vehicle could also have a charcoal lter that
can limit many odors from being pulled into your
vehicle. This lter, like your engines air cleaner
lter, needs to be changed periodically. See
Scheduled Maintenance on page 505. The air
quality sensor system does not protect against
carbon monoxide (CO), which you cannot see or
smell. SeeEngine Exhaust on page 125.
O(Power Driver’s Temperature):Press the
power button located on the driver’s side of
the climate control panel to turn the entire climate
control system on or off. Turn the knob to
increase or decrease the temperature inside the
vehicle.
O(Power Passenger’s Temperature):Press
the power button located on the passenger’s side
of the climate control panel to turn the passenger’s
climate control system on if they wish to have adifferent setting than the driver. Turn the knob to
increase or decrease the temperature for the
front passenger. Turning the passenger’s
side power button off will not shut off the climate
control system for the passenger. The system
is set to the same setting as the driver.
{(Ventilated Seat):Press this button, to turn on
the driver or passenger’s side ventilated seat, if
the vehicle has this feature. SeeHeated and
Ventilated Seats on page 11.
J(Heated Seat):Press this button, to turn on
the driver or passenger’s side heated seat
and seatback, if the vehicle has this feature. See
Heated and Ventilated Seats on page 11.
^(Air Conditioning):Press this button to
manually turn off the air conditioning compressor.
Press AUTO to return to automatic operation or
press the A/C OFF button again. To limit fogging on
the windshield, the air conditioning compressor
cannot be off while in the defrost mode.
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Sensors
There is a solar sensor located on the instrument
panel, near the windshield.
There is also an interior temperature sensor
located next to the steering wheel on the
instrument panel.
These sensors monitor the solar radiation and the
air inside the vehicle, then use the information
to adjust the temperature, the fan speed and the
air delivery system, in order to maintain theselected temperature. The system may also
supply cooler air to the side of the vehicle facing
the sun. Do not cover the sensors or the automatic
climate control system will not work properly.
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 from the windshield. Use
the defog mode to clear the windows of fog or
moisture and warm the passengers. Use the
defrost mode to remove fog or frost from the
windshield more quickly.
yNz(Mode):Press this button until defog
appears on the display.
-(Defog):This mode directs the air between
the windshield and oor outlets with some
air supplied to the outboard panel outlets and side
window defogging outlets. When this mode is
selected, the system turns off recirculation
and runs the air-conditioning compressor unless
the outside temperature is at or below freezing.
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The recirculation mode is cancelled when the
system enters the defog mode. If recirculation is
selected while in the defog mode, it is cancelled
after 10 minutes.
If there is fogging on the side windows, remain in
defog or defrost mode until they clear.
0(Defrost):Press this button to direct most of
the air to the windshield, with some air directed
to the side windows and outboard panel outlets. In
this mode, 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.
This mode can also cause the fan speed and air
temperature to increase.
Rear Window Defogger
The rear window defogger uses a warming grid to
remove fog or frost from the rear window.
The rear window defogger only works when the
ignition is on or during remote start, if
programmed. See “Personal Settings Menu” under
Vehicle Personalization on page 148for additional
information.
=(Rear Window Defogger):Press this button
to turn the rear window defogger on or off. Be
sure to clear as much snow from the rear window
as possible.
The rear window defogger turns off about
10 minutes after the button is pressed. If the
vehicle’s speed is above 30 mph (48 km/h), the
rear defogger stays on continuously. If turned
on again, the defogger only runs for about
ve minutes before turning off. The defogger can
also be turned off by pressing the button again
or by turning off the engine.
The heated outside rearview mirrors also heat to
help clear fog or frost from the surface of the
mirror when the rear window defogger is on. See
Outside Power Heated Mirrors on page 130.
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 lever located in the center of each outlet
to change the direction of the airow, either
side-to-side or up and down. Use the thumbwheels
to open or close the outlets to adjust the airow.
Turn the thumbwheel towards the center
console to open the outlets and allow the
maximum amount of air to enter your vehicle. Turn
the thumbwheel towards the vehicle door to
close the outlets and minimize the amount of air
entering the vehicle.
Operation Tips

Clear away any ice, snow or leaves from the
air inlets at the base of the windshield that
may block the ow of air into your vehicle.
Use of non-GM approved hood deectors may
adversely affect the performance of the system.
Keep the path under the front seats clear of
objects to help circulate the air inside of your
vehicle more effectively.
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 239.
Rear Climate Control System
Your vehicle has a rear climate control system.
The base model includes air outlets in the rear of
the center console for cooling and under-seat
air outlets for heating. The temperature, quantity,
and air delivery location is controlled automatically
by the front climate control system.
Some vehicles are equipped with an optional
climate control panel for the rear passenger,
located on the back of the center console.
The left knob controls the temperature of the air to
the rear passengers. Turning the knob to the
left will make the air cooler. Turning the knob to
the right will make the air warmer.
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The right knob controls the air delivery to the rear
passengers. Turning the knob all the way to
the left will shut off airow to the rear passengers.
Operating with the rear air delivery off may
make the entire vehicle warm or cool less quickly.
It may also increase the air rush sound of the
front system.
9(Off):This is the off position.
Y(Vent):This mode directs all the rear
passenger airow to the outlets in the console.
This is the normal position for cool down
conditions.
\(Bi-Level):This mode directs airow to the
console outlets and the oor.
[(Floor):This mode directs all of the airow to
the oor. This is the normal position for warm
up conditions.The amount of airow to the rear passengers is
controlled automatically by the front climate control
system, regardless of optional equipment.
Airow to the rear system will be turned off when
defrost is selected on the front climate control
panel to direct air to clear the windshield.
Vehicles equipped with a rear climate control
panel, also, have heated rear seats. There are
two buttons, each with three indicator lights,
located between the two climate control knobs on
the rear climate control panel, to control the
rear heated seats. SeeHeated Seats on page 14
for additional information.
Be sure to keep the area under the front seats
clear of any objects so the air in your vehicle can
circulate effectively.
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Passenger Compartment Air Filter
Your vehicle may be equipped with a passenger
compartment air lter. There are two types of lters
available. There is a standard dust lter that
traps small particles including pollen. There is,
also, a dust/odor lter available that traps dust and
pollen and also uses a charcoal element to help
reduce many offensive odors from entering
your vehicle. Like your vehicle’s engine air
cleaner/lter, it will need to be changed
periodically. For information on how often to
change the passenger compartment air lter, see
Scheduled Maintenance on page 505.
Notice:Driving without a passenger
compartment air lter in place can cause water
and small particles, like paper and leaves, to
be pulled into your climate control system
which may cause damage to it. Make sure you
always replace the old lter with a new one.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.
SeeEngine Compartment Overview on page 373
for more information on location. SeeDoing
Your Own Service Work on page 364for
information on doing your own service work.
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To access the passenger compartment air lter,
do the following:
1. Pull back the rubber hood seal from the edge
of the leaf screen vent cover.
2. Remove the three fasteners that hold the lter
access cover in place and slide the cover off.
3. To access the lter, remove the black plastic
water deector by lifting the outboard edge of
the deector to release the retention tab.
4. Lift the inboard edge of the deector to
release the retention tab.
5. Lift and slide the water deector toward the
inboard side and remove it.6. The top edge of the lter should be visible.
Reach in and lift the lter out, pulling upward
and toward the front of the vehicle.
7. Insert the new air lter by sliding it back into
place. Make sure the arrow on the lter is
pointing toward the passenger compartment.
Reverse steps 1 through 3 to reinstall the water
deector, lter cover and the hood seal.
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