2009 CADILLAC DTS Owners Manual

There is also an interior
temperature sensor
located next to the steering
wheel that measures the
temperature of the air
inside the vehicle.
There is also an exterior temperature sensor located
behind the front grille. This sensor reads the outside
air temperature and helps maintain the temperature
inside the vehicle. Any cover on the front of the vehicle
could cause a false reading in the displayed temperature.In order to prevent false temperature readings at
startup, the displayed temperature will not change
until the following occurs:
Vehicle speed is above 10 mph (16 km/h) for
5 minutes.
Vehicle speed is above 32 mph (51 km/h) for
2 and a half minutes.
The climate control system uses the information from
these sensors to maintain your comfort setting by
adjusting the outlet temperature, fan speed, and the air
delivery mode. The system may also supply cooler air to
the side of the vehicle facing the sun. The recirculation
mode will also be used as needed to maintain cool outlet
temperatures.
3-45

Outlet Adjustment
For the front outlets, use the thumbwheel located below
each outlet to change the direction of the airow. Use the
thumbwheel located next to the outlets to shut the airow
or to open the outlets and re-direct the air.
For the rear outlets, slide the lever left or right and up or
down to change the direction of the airow.
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.
Rear Climate Control System
For vehicles with a rear climate control system, the rear
seat passengers can adjust the direction of the airow,
fan speed and temperature for the rear seating area.
This system also works with the main climate control
system in the vehicle.
The rear climate control system is located on the back
of the center console.
A. Display
B. Fan ControlC. Temperature Control
D. Air Delivery Mode
Control
3-46

AUX (Auxiliary):Press the AUX button located on
the front climate control panel to turn the rear climate
control system on or off. When turned on the rear system
operates in automatic mode and the temperature settings
selected for the front climate control panel will also be
selected for the rear passengers.
To adjust the rear climate control system, the rear
passenger can select a different temperature, mode
or fan speed. Whenever the rear passengers have
adjusted settings on the rear climate control system,
the AUX light is lit on the front climate control system.
When the front climate control system is turned off
or in defrost mode, the rear climate control system is
turned off. The rear system will turn back on once
another front mode is selected.
For more information on how to use the front climate
control system, seeDual Climate Control System
on page 3-40. For more information on the air outlets,
seeOutlet Adjustment on page 3-46.Automatic Operation
«A ª(Fan Control):Press until AUTO appears on
the display to place the system in automatic mode. When
automatic operation is active, the system automatically
controls the fan speed. If in auto fan mode, pressing the
up arrow button will cancel automatic operation and
places the system in manual mode. If in auto mode,
pressing the down arrow will turn the rear climate
control system off.
«Nª(Air Delivery Mode Control):Press until
AUTO appears on the display to place the system
in automatic mode. When automatic operation is
active, the system controls the air delivery mode.
3-47

Manual Operation
«A ª(Fan Control):Press to increase or decrease
the fan speed.
«bª(Temperature Control):Press to increase or
decrease the temperature for the rear seat passengers.
Once the rear temperature setting is changed from
following the front temperature setting, it will no longer
follow changes to the front temperature setting until
the front climate control AUX button resets it.
«Nª(Air Delivery Mode Control):Press these
buttons to change the air delivery mode. If in AUTO
air delivery mode, pressing the up arrow button will
cancel automatic operation and place the system in
manual mode.
Y(Vent):Air is directed to the upper outlets.
%(Bi-Level):Air is divided between the upper outlets
and the oor outlets.
[(Floor):Air is directed to the oor outlets.
Passenger Compartment Air Filter
The passenger compartment air lter traps most of the
pollen from the air entering the vehicle. The lter may
need to be changed periodically. For how often to change
the passenger compartment air lter, seeScheduled
Maintenance on page 6-4.
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.
3-48

To access the passenger compartment air lter:
1. Use a tool to remove the cover. If the vehicle has
tabs that allow the cover to be unlatched with your
ngers, a tool will not be needed for this step.2. Then, insert a tool behind the push pin located on
the inboard side of the air lter compartment to
carefully pry the pin out.
3-49

3. To remove the air lter, insert a tool between the air
lter and the compartment wall on the outboard side
of the vehicle. Then, push in to atten the pin holding
the air lter in place. Gently remove the air lter and
any loose debris that may be inside the air lter
compartment.
4. Insert the new air lter by pushing until you hear
a click. Then, reinstall the push pin and snap the
cover into place.
Warning Lights, Gages, and
Indicators
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 prevent injury.
Warning lights come on when there may be or is a
problem with one of the vehicle’s functions. Some
warning lights come on briey when the engine is
started to indicate they are working.
Gages can indicate when there may be or is a problem
with one of the vehicle’s functions. Often gages and
warning lights work together to indicate a problem with
the vehicle.
When one of the warning lights comes on and stays on
while driving, or when one of the gages shows there may
be a problem, check the section that explains what to do.
Follow this manual’s advice. Waiting to do repairs can be
costly and even dangerous.
3-50

Instrument Panel Cluster
The instrument panel cluster is designed to show how the vehicle is running. It show how fast the vehicle is going,
how much fuel has been used and many of the other things needed drive safely and economically.
United States version shown, Canada similar
3-51

Speedometer and Odometer
The speedometer shows the speed in both miles
per hour (mph) and kilometers per hour (km/h).
See “MPH (km)” underDIC Operation and Displays
on page 3-68for more information.
The odometer mileage can be checked without the
vehicle running. The vehicle’s odometer works together
with the driver information center. Trip A and Trip B
can be set on the odometer. See “Trip Fuel” under
DIC Operation and Displays on page 3-68for more
information.
If the vehicle ever needs a new odometer installed, the
new one is set to the correct mileage total of the old
odometer.
Tachometer
This gage indicates
the engine speed
in revolutions per
minute (rpm).
3-52