2002 CADILLAC DEVILLE maintenance schedule

2-101

AVG MPH (Average Miles per Hour): This
message shows the average speed you have traveled
at since the last time you reset the value. To reset the
value, press the INFO button to display AVG MPH
then press and hold the INFO RESET button until
0.0 AVG MPH is displayed.

TIMER: This feature is like a stopwatch, in that
you can clock the time it takes to get from one point
to another.
To operate, press the INFO button to display
TIMER. Each of the fields for the hours, minutes
and seconds are two numeric digits.
Once TIMER 00:00:00 is displayed, press the
ON/OFF button to start the timing feature. Press
the ON/OFF button again to stop it. If you will be
starting and stopping your vehicle, during a trip for
instance, the TIMER feature will automatically start
timing where it left off when you last stopped.
To reset it, press and hold the INFO RESET button
until the display reads TIMER 00:00:00. Press the
INFO button to exit from the TIMER display.
ENGINE OIL LIFE: Press the INFO button to
display ENGINE OIL LIFE, then press and hold the
INFO RESET button until 100% ENGINE OIL
LIFE is displayed. (This only needs to be reset after
you have had the oil changed.)

TRANSMISSION FLUID LIFE MONITOR:
Under normal conditions, the rate of deterioration of
the transmission fluid is slow. See ªMaintenance
Scheduleº in the Index for proper fluid and change
intervals. To reset the transmission fluid life, press
the INFO button to display TRANS FLUID LIFE,
then press and hold the INFO RESET button
until 100% TRANS FLUID LIFE is displayed.
(This only needs to be reset after you have had the
fluid changed.)
ON/OFF: Pressing this button turns the Programming
and Personalization Features on and off. (FEATURE
PROGRAMMING must be displayed on the DIC to
begin actual programming.) This button also starts and
stops the timer.

2-104
CHANGE ENGINE OIL - 82: This means that the life
of the engine oil has expired and it should be changed
within 200 miles. See ªEngine Oilº and ªFilter
Recommendationsº in the Index. After an oil change,
the Oil Life Indicator must be reset. See ªOil Life
Indicator, How to Resetº in the Index.
CHANGE TRANS FLUID
- 47: This message will
appear when it is time to replace the transaxle fluid. See
ªMaintenance Scheduleº in the Index for the proper
fluid and change intervals.
CHECK BRAKE FLUID
- 37: This message will
display if the ignition is in ON to inform the driver that
the brake fluid level is low. Have the brake system
serviced by a technician as soon as possible. See ªBrake
System Warning Lightº in the Index.
CHECK COOLANT LEVEL
- 2: This message
will appear when there is a low level of engine coolant.
Have the cooling system serviced by a technician as
soon as possible.CHECK FUEL GAGE
- 50: (Analog Cluster Only)
This message will appear when the fuel supply is less
than 5 gallons (18.9 L) and the display is turned off.
A single chime will also sound when this message
is displayed.
CHECK GAS CAP
- 61: This message will appear if
the gas cap has not been fully tightened. You should
recheck your gas cap to ensure that it's on properly.
CHECK OIL LEVEL
- 36: For correct operation of
the low oil sensing system, your vehicle should be on a
level surface. A false CHECK OIL LEVEL message
may appear if the vehicle is parked on a grade. The oil
level sensing system does not check for actual oil level
if the engine has been off for a short period of time, and
the oil level is never checked while the engine is
running. If the CHECK OIL LEVEL message appears,
and your vehicle has been parked on level ground with
the engine off for at least 30 minutes, the oil level
should be checked by observing the oil dipstick. Prior to
checking the oil level, be sure the engine has been off
for a few minutes and your vehicle is on a level surface.
Then check the dipstick and add oil if necessary.
See ªEngine Oilº in the Index.

2-128
Oil Life Indicator
This feature lets you know when to change the engine
oil. It's based on the engine oil temperatures and your
driving patterns.To see the display, press the INFO button several times until
ENGINE OIL LIFE appears. If you see 99% ENGINE OIL
LIFE, 99 percent of your current oil life remains.
The DIC may display a CHANGE ENGINE OIL
message. Always keep a written record of the mileage and
date when you changed your oil. For more information,
see ªMaintenance Scheduleº in the Index. If you see
CHANGE ENGINE OIL, it means the oil life is gone and
you should change the oil right away. The system doesn't
check how much oil you have, so you'll still have to check
for that. To see how, see ªEngine Oilº in the Index.
When the oil is changed, you'll need to reset the system.
See ªOil Life Indicator, How to Resetº in the Index.

3-10
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.
Passenger Compartment Air Filter
Passenger compartment air, both outside air and
recirculated air, is routed through a passenger
compartment filter. The filter removes certain
contaminants from the air, including pollen and dust
particles. Reductions in airflow, which may occur more
quickly in dusty areas, indicate that the filter needs to
be replaced early.
The filter should be replaced as part of routine
scheduled maintenance. See ªPassenger Compartment
Air Filterº in the Index for more information on
replacement. See ªMaintenance Scheduleº in the Index
for replacement intervals.
Your vehicle will not be damaged if you choose not to
replace the filter once the old one is removed.HVAC Steering Wheel Controls
(If Equipped)
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.
~TEMP! (Temperature): Press the up arrow on the
control to increase the temperature and the down arrow
to decrease temperature manually.
!
~
(Fan): Press the up arrow on the control to
increase the fan speed and the down arrow to decrease
fan speed manually.

4-41 When You Are Ready to Leave After
Parking on a Hill
1. Apply your regular brakes and hold the pedal down
while you:

start your engine,

shift into a gear, and

make sure the parking brake has released.
2. Let up on the brake pedal.
3. Drive slowly until the trailer is clear of the chocks.
4. Stop and have someone pick up and store the chocks.
Maintenance When Trailer Towing
Your vehicle will need service more often when you're
pulling a trailer. See the Maintenance Schedule for more
on this. Things that are especially important in trailer
operation are automatic transaxle fluid (don't overfill),
engine oil, drive belt, cooling system and brake system.
Each of these is covered in this manual, and the Index
will help you find them quickly. If you're trailering, it's
a good idea to review this information before you start
your trip.
Check periodically to see that all hitch nuts and bolts
are tight.
Engine Cooling When Trailer Towing
Your cooling system may temporarily overheat during
severe operating conditions. See ªEngine Overheatingº
in the Index.

6-18
Follow these steps to reinstall the cover to the engine air
cleaner/filter housing:
1. Align the three tabs located on the back of the cover
with the three slots on the back of the housing.
2. Push the cover slightly down and towards the
engine to engage the tabs in the slots and align the
two wing screws.
3. Engage and tighten the two wing screws on the top
of the engine air cleaner/filter housing cover.
Refer to the Maintenance Schedule to determine when to
replace the air filter.
See ªScheduled Maintenance Servicesº in the Index.
CAUTION:
Operating the engine with the air cleaner/filter
off can cause you or others to be burned. The air
cleaner not only cleans the air, it stops flame if
the engine backfires. If it isn't there, and the
engine backfires, you could be burned. Don't
drive with it off, and be careful working on the
engine with the air cleaner/filter off.
NOTICE:
If the air cleaner/filter is off, a backfire can
cause a damaging engine fire. And, dirt can easily
get into your engine, which will damage it.
Always have the air cleaner/filter in place when
you're driving.

6-19
Passenger Compartment Air Filter
The passenger compartment air filter traps most of the
pollen from the air entering your vehicle. Like your
vehicle's air cleaner filter, it may need to be changed
periodically. For how often to change the passenger
compartment air filter, see ªMaintenance Scheduleº in
the Index.
The access panel for the passenger compartment air
filter is located under the hood near the windshield, on
the passenger's side of the vehicle.
1. To access the passenger compartment air filter, use a
tool to gently pry the cover up. (If your vehicle has
tabs that allow you to unlatch the cover with your
fingers, you will not need a tool for this step.)

6-21
Automatic Transaxle Fluid
When to Check and Change
A good time to check your automatic transaxle fluid
level is when the engine oil is changed.
Change both the fluid and filter every 50,000 miles
(83 000 km) if the vehicle is mainly driven under one or
more of these conditions:

In heavy city traffic where the outside temperature
regularly reaches 90F (32C) or higher.

In hilly or mountainous terrain.

When doing frequent trailer towing.

Uses such as found in taxi, police or delivery service.

Use such as limousine service.
If you do not use your vehicle under any of these
conditions, the fluid and filter do not require change
until the message CHANGE TRANS FLUID appears on
the Driver Information Center.
See ªScheduled Maintenance Servicesº in the Index.
How to Check
Because this operation can be a little difficult, you
may choose to have this done at the dealership
service department.
If you do it yourself, be sure to follow all the
instructions here, or you could get a false reading
on the dipstick.
NOTICE:
Too much or too little fluid can damage your
transaxle. Too much can mean that some of the
fluid could come out and fall on hot engine parts
or exhaust system parts, starting a fire. Too little
fluid could cause the transaxle to overheat. Be
sure to get an accurate reading if you check your
transaxle fluid.