1999 CADILLAC DEVILLE climate control

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3-10 Air Conditioning
On hot days, open the windows long enough to let hot
inside air escape. This reduces the time it takes for your
vehicle to cool down. Then keep your windows closed
for the air conditioner to work its best.
With the digital cluster climate control panel, press the
AUTO/ECON button to assist in cooling air and in
maintaining proper airflow. Adjust the temperature to a
comfortable setting by pressing the blue button to cool
your vehicle and pressing the red button to warm your
vehicle. Press the fan button arrows up or down to adjust
the fan speed.
If your vehicle has a console climate control panel
(which is standard with the analog cluster), press the AC
button or the TEMP/AUTO knob to turn the system on.
The system will cool and dehumidify the air inside the
vehicle. Also while in the AUTO mode, the system will
use recirculation as necessary to cool the air. You may
also need to adjust the interior temperature and the fan
speed as needed.
When the air conditioner is on, you may sometimes
notice slight changes in your vehicle's engine speed
and power. This is normal because the system is
designed to cycle the compressor on and off to
keep the desired temperature.
Heating
With the digital cluster climate control panel, press the
AUTO/ECON button to direct airflow and to help save
fuel. Adjust the temperature, if necessary, by pressing
the blue button to decrease temperature and pressing the
red button to increase temperature. Also remember to
adjust the fan speed by pressing the up or down arrow.
If your vehicle has a console climate control panel
(which is standard with the analog cluster), press the
MODE button to select heater. Adjust the interior
temperature to a comfortable level and if the fan speed
needs adjusting, press the up or down arrow.
With each system, outside air will be brought in and sent
through the floor, air conditioning or bi
-level outlets
(depending on the condition). The heater works best if
you keep your windows closed while using it.
Defogging and Defrosting
On cool, humid days, use defog (digital cluster climate
control panel only) to keep the windshield and side
windows clear. Use defrost to remove fog or ice from
the windshield quickly in extremely humid or
cold conditions.

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3-11
With the digital cluster climate control panel, press the
DEFOG button and adjust the fan speed by pressing the
fan button up or down. If you use DEFROST, adjust the
fan speed the same way. If you select DEFROST from
AUTO, the system will control the fan speed. The
temperature will also need to be adjusted to your comfort
level. Press the blue button to decrease the temperature
and the red button to increase the temperature.
If your vehicle has a console climate control panel
(which is standard with the analog cluster), press the
MODE button to select DEFROST. Adjust the fan speed
by pressing the fan button up or down. If you select
DEFROST from AUTO, the system will control the fan
speed. The temperature also needs to be adjusted by
turning the TEMP/AUTO knob.
Note that recirculation is not available in the defrost
or defog modes.Rear Window Defogger
The lines you see on the
rear window warm the
glass. Press this button to
turn on the rear defogger.
With it, the rear window
and both outside rearview
mirrors are heated.
The system will automatically shut off after 10 minutes.
If further defogging is desired, press the button again.
Do not attach a temporary vehicle license, tape or decals
across the defogger grid on the rear window.
NOTICE:
Don't use a razor blade or something else sharp
on the inside of the rear window. If you do, you
could cut or damage the warming grid or the
integrated rear window antenna, and the repairs
wouldn't be covered by your warranty.

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3-13
Ventilation Tips

Keep the hood and front air inlet free of ice, snow or
any other obstruction (such as leaves). The heater
and defroster will work far better, reducing the
chance of fogging the inside of the windows.

Keep the air path under the front seats clear
of objects. This helps circulate air throughout
your vehicle.
HVAC Steering Wheel Controls
Some heating and cooling
controls can be adjusted at
the steering wheel. Other
touch controls operate some
audio controls. See ªAudio
Steering Wheel Controlsº
in the Index.
FAN SPEED: Press the up arrow lever to
increase the fan speed and the down arrow lever to
decrease fan speed.
TEMP: Press the up arrow lever to increase
the temperature and the down arrow lever to
decrease temperature.
Climate Control Personalization
(If Equipped)
With this feature, your vehicle will recall the latest
climate control settings as adjusted the last time your
vehicle was operated. This feature allows two different
drivers to store and recall their own climate control
settings. The settings recalled by the climate control
system are determined by which remote keyless entry
transmitter (ª1º or ª2º) was used to enter the vehicle.
The number on the back of the remote keyless entry
transmitter corresponds to driver 1 or to driver 2. After
the unlock button is pressed on the remote keyless entry
transmitter or the ignition key is placed in the ignition
(the ignition must be turned to LOCK), the climate
control settings will automatically adjust to where they
were last set. The settings can also be changed by briefly
pressing the memory seat buttons 1 or 2 located on the
driver's door.

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6-22 How to Reset Transaxle Fluid
Change Indicator
Your vehicle is equipped with a transaxle fluid change
indicator. A CHANGE TRANS FLUID message will
display on the Driver Information Center (DIC) when
the powertrain computer determines that the transaxle
fluid needs to be changed or at each 100,000 miles
(160 000 km) interval, whichever occurs first. When this
message appears, change the transaxle fluid and reset
the transaxle fluid life indicator as follows:
1. Turn the ignition on but do not start the engine.
2. Press and hold the OFF and rear defog buttons on the
climate control at the same time until the TRANS
FLUID RESET message appears on the DIC.
Surge Tank Pressure Cap
NOTICE:
The surge tank cap is a 15 psi (105 kPa)
pressure
-type cap and must be tightly installed to
prevent coolant loss and possible engine damage
from overheating. Be sure the arrows on the
cap line up.
If the surge tank pressure cap needs to be replaced, a
GM cap is recommended.
Thermostat
Engine coolant temperature is controlled by a thermostat
in the engine coolant system. The thermostat stops the
flow of coolant through the radiator until the coolant
reaches a preset temperature.
If your thermostat needs to be replaced, a GM
thermostat is recommended.

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6-48
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 1/2) 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. Warning: The traction grade
assigned to this tire is based on straight
-ahead braking
traction tests, and does not include acceleration,
cornering, hydroplaning, or peak traction characteristics.Temperature
-- A, B, C
The temperature grades are A (the highest), B, and C,
representing the tire's resistance to the generation of
heat and its ability to dissipate heat when tested under
controlled conditions on a specified indoor laboratory
test wheel. Sustained high temperature can cause the
material of the tire to degenerate and reduce tire life, and
excessive temperature can lead to sudden tire failure.
The grade C corresponds to a level of performance
which all passenger car tires must meet under the
Federal Motor Vehicle Safety Standard No. 109.
Grades B and A represent higher levels of performance
on the laboratory test wheel than the minimum required
by law.
Warning: The temperature grade for this tire is
established for a tire that is properly inflated and not
overloaded. Excessive speed, underinflation, or
excessive loading, either separately or in combination,
can cause heat buildup and possible tire failure.

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6-67
Fuse Usage
TURN Electronic Flasher,
Turn/Hazard Switch
CONSOLE Rear Zone Blower, Right and
Left Heated Seat Switches
(Optional), Cellular Phone
Handset (Optional)
SPARE Not Used
SPARE Not Used
RSS Road Sensing Suspension (RSS)
(DeVille Concours Only)
IGN 0
-BODY PRNDL Indicator (DeVille
Concours Only), PZM, Cluster,
Air Control Module (ACM),
Upper Zone Motor, Lower Zone
Motor (Optional), HVAC
Solenoids, Climate Control Panel
Analog Cluster (Console Shift
Only), Rear Defog Relay, ELC
Relay (DeVille Concours Only),
Dual Zone Switch (DeVille and
DeVille d'Elegance Only)Fuse Usage
COMFORT CD Player, Remote Keyless Entry
(RKE), Controlled Power Relay,
Air Control Module (ACM), PZM
AMP Active Audio Amplifier (Optional)
PZM Passenger Zone Module (PZM)
RADIO/PHONE Radio Receiver, Phone, DAB
Relay, Trunk Release Relay,
Fuel Door Release Relay,
High/Low Beam Relay
CLUSTER Steering Wheel Controls, Cluster
ACC PZM, Electrochromic Mirror,
Rain Sensor (Optional),
Accessory Relay
HTD BACKLT Rear Window Defog
HTD MIR Right and Left Heated
Outside Mirrors
HTD SEAT R Passenger Heated Seat
Relay (Optional)
HTD SEAT L Driver Heated Seat
Relay (Optional)

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8-1
Section 8 Index
A
BS 4-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adapter Kits, CDs 3-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adding Engine Oil 6-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adding Equipment to the Outside of Your Vehicle 6-3 . . . . . .
Aiming Headlamps 6-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Bag 1-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How Does it Restrain 1-27 . . . . . . . . . . . . . . . . . . . . . . . . . .
How it Works 1-24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Location 1-24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Readiness Light 1-23, 2-68 . . . . . . . . . . . . . . . . . . . . . . . . .
Servicing 1-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
What Makes it Inflate 1-26 . . . . . . . . . . . . . . . . . . . . . . . . . .
What Will You See After it Inflates 1-27 . . . . . . . . . . . . . . .
When Should it Inflate 1-26 . . . . . . . . . . . . . . . . . . . . . . . . .
Air Conditioning 3-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Conditioning Refrigerants 6-70 . . . . . . . . . . . . . . . . . . . . .
Air Control, Climate Control System 3-3, 3-6 . . . . . . . . . . . . .
Alarm, Theft-Deterrent 2-15 . . . . . . . . . . . . . . . . . . . . . . . . . .
Alignment and Balance, Tire 6-49 . . . . . . . . . . . . . . . . . . . . . .
Aluminum Wheels, Cleaning 6-55 . . . . . . . . . . . . . . . . . . . . . .
Analog Cluster Climate Control Panel 3-6 . . . . . . . . . . . . . . . .
Analog Control Buttons 2-81 . . . . . . . . . . . . . . . . . . . . . . . . . .
Antenna, Power 3-41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Antifreeze 6-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Anti
-Lock
Brake System Warning Light 2-71, 4-7 . . . . . . . . . . . . . . . .
Brakes 4-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Anti-Lockout Feature 2-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Anti-Theft, Radio 3-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appearance Care 6-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appearance Materials, Vehicle Care 6-57 . . . . . . . . . . . . . . . .
Apply Brake To Shift Message 2-82 . . . . . . . . . . . . . . . . . . . .
Arbitration Program 7-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Armrest, Storage 2-53, 2-54 . . . . . . . . . . . . . . . . . . . . . . . . . .
Ashtrays 2-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assist Handles 2-56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio Equipment, Adding 3-39 . . . . . . . . . . . . . . . . . . . . . . . .
Audio Steering Wheel Controls 3-37 . . . . . . . . . . . . . . . . . . . .
Audio System, Tips 3-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio Systems 3-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Door Locks 2-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Pull-Down Feature, Trunk Lid 2-13 . . . . . . . . . . . .
Automatic Transaxle
Overdrive 2
-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting Your Engine 2-20 . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid 6-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 2-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shifting 2-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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8-3
Checking Engine Oil 6-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking Things Under the Hood 6-8 . . . . . . . . . . . . . . . . . . .
Checking Your Restraint Systems 1-53 . . . . . . . . . . . . . . . . . .
Chemical Paint Spotting 6-56 . . . . . . . . . . . . . . . . . . . . . . . . . .
Child Restraints 1-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securing in a Rear Outside Seat Position 1-43 . . . . . . . . . . .
Securing in the Center Rear Seat Position 1-45 . . . . . . . . . .
Securing in the Right Front Seat Position 1-47 . . . . . . . . . .
Top Strap 1-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Where to Put 1-41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CHMSL 6-39 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chrome-Plated Wheels, Cleaning 6-55 . . . . . . . . . . . . . . . . . .
Cigarette Lighter 2-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Breakers and Fuses 6-63 . . . . . . . . . . . . . . . . . . . . . . .
City Driving 4-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning
Aluminum or Chrome
-Plated Wheels 6-55 . . . . . . . . . . . . .
Exterior Lamps/Lenses 6-54 . . . . . . . . . . . . . . . . . . . . . . . .
Fabric/Carpet 6-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glass Surfaces 6-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inside of Your Vehicle 6-51 . . . . . . . . . . . . . . . . . . . . . . . . .
Instrument Panel 6-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interior Plastic Components 6-52 . . . . . . . . . . . . . . . . . . . . .
Leather 6-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outside of the Windshield and Wiper Blades 6-53 . . . . . . .
Outside of Your Vehicle 6-54 . . . . . . . . . . . . . . . . . . . . . . . .
Speaker Covers 6-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tires 6-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vinyl 6-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheels 6-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wood Panels 6-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Climate Control
Personalization 3
-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steering Wheel Controls 3-13 . . . . . . . . . . . . . . . . . . . . . . .
System 3-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clock, Setting the 3-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coinholder (Front Storage Area) 2-53 . . . . . . . . . . . . . . . . . . .
Comfort Controls 3-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Comfort Controls and Radio System Personalization 2-94 . . .
Compact Disc Care 3-40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compact Disc Player Care 3-40 . . . . . . . . . . . . . . . . . . . . . . . .
Compact Disc Players 3-21, 3-30 . . . . . . . . . . . . . . . . . . . . . .
Compact Spare Tire 5-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compartments, Storage 2-53 . . . . . . . . . . . . . . . . . . . . . . . . . .
Compass, Rearview Mirror with 2-49 . . . . . . . . . . . . . . . . . . .
Console Shift Lever 2-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continual Variable Road Sensing Suspension 2-95 . . . . . . . . .
Control of a Vehicle 4-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control System, Traction 4-9 . . . . . . . . . . . . . . . . . . . . . . . . . .
Convenience Net 2-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Convex Outside Mirror 2-52 . . . . . . . . . . . . . . . . . . . . . . . . . .
Coolant 6-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heater, Engine 2-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Surge Tank 5-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cooling System 5-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cornering Lamps 2-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Courtesy Lamps 2-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Courtesy Transportation 7-8 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cruise Control 2-39 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cruise Engaged Message 2-84 . . . . . . . . . . . . . . . . . . . . . . . . .
Cupholders (in Storage Areas) 2-53, 2-54 . . . . . . . . . . . . . . . .
Curb View Assist Mirror 2-52, 2-93 . . . . . . . . . . . . . . . . . . . .