1998 CADILLAC DEVILLE maintenance schedule

Downloaded from www.Manualslib.com manuals search engine BATTERY VOLTAGE HIGH -’ 8: This message
shows that the electrical charging system is
overcharging (more than 16 volts). To avoid being
stranded, have the electrical system checked by your
dealership. You can reduce the charging overload by
using the accessories. Turn on the lamps and radio, set
the climate control on AUTO and the fan speed on HI,
and turn the rear window defogger on.
You can monitor
battery voltage on the Driver Information Center (DIC)
by pressing the
INFO button. The normal range is
11.5 to 15.5 volts when the engine is running.
BATTERY VOLTAGE LOW - 6: This message will
appear when the electrical system is charging less than
10 volts or if the battery has been drained. If this
message appears immediately after starting,
it is possible
that the generator can still recharge the battery. The
battery should recharge and may take a few hours to do
so. Consider using an auxiliary charger to boost the
battery after returning home or to a final destination.
(Be sure to follow the manufacturer’s instructions when
recharging the battery.)
If this message appears while driving or after starting
your vehicle and stays on, have it checked immediately
to determine the cause of this problem.
To help the
generator recharge the battery quickly, you can reduce
the load on the electrical system by turning
off the
accessories. You can monitor battery voltage on the Driver Information Center (DIC) by pressing the
INFORMATION
(INFO) button. The normal range is
11.5 to 15.5 volts.
BRAKE VACUUM PROBLEM -108: The circuit in
the brake booster vacuum has shorted or is loose when
this message appears. Your vehicle may lose power
brakes but you will still have the use of manual brakes.
The power brakes will not be affected if the problem
is
caused by a failed sensor. Have your vehicle serviced
immediately at your dealership.
CHANGE ENGINE OIL - 82: This means that the life
of the engine oil has expired and it should be changed
within
200 miles (322 km). See “Engine Oil” and “Filter
Recommendations’’ in the Maintenance Schedule
booklet. After an oil change, the Oil Life Indicator must be reset. For more information, see “How to Reset the
Oil Life Indicator” in the Index.
CHANGE TRANS FLUID - 47: This message will
appear when it is time to replace the transaxle fluid. See
the Maintenance Schedule booklet for the proper fluid
and change intervals.
CHECK BRAKE FLUID - 37: This message will
display if the ignition is in RUN to inform the driver that
the brake fluid level is low. Check the brake reservoir
level and add fluid as needed. Have the brake system
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Downloaded from www.Manualslib.com manuals search engine Oil Life 1 iicator
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
INFORMATION (INFO) button until
XX OIL LIFE
LEFT appears.
If you see 99% OIL LIFE LEFT,
99 percent of your current oil life remains. The Driver Information Center
(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 the
Maintenance Schedule booklet. If you see CHANGE
ENGINE
OIL, it means that you have less than
10 percent of the oil life left and you should consider
changing your engine oil.
The system should indicate changing the oil between
3,000 miles (5 000
km) and 7,500 miles (12 500 km).
It may indicate changing the oil before 3,000 miles
(5 000
km) depending on your driving habits. If the
vehicle has been driven 7,500 miles
(12 500 km), it will
indicate to change the oil. If you drive in a dusty area, you
should change your
oil every 3,000 miles (5 000 krn) or
three months (whichever comes first) unless the display indicates changing it sooner. The system doesn't check
how much oil you have, so you'll still have to check for
that. To see how,
see "Engine Oil" in the Index. '
When the oil is changed, you'll need to reset the system.
To reset, display the Oil Life Indicator by pressing the
INFORMATION
(INFO) button. Then press and hold
the RESET button until the display shows
100% OIL
LIFE LEFT.

Downloaded from www.Manualslib.com manuals search engine Parking on Hills
You really should not park your vehicle, with-a trailer
attached, on a hill. If something goes wrong,
your rig
could start to move. People can be injured, and both
your vehicle and the trailer can be damaged.
But if you ever have to park your rig on a hill, here’s
how to do it:
1.
2.
3.
4.
5.
Apply your regular brakes, but do not shift into
PARK (P).
Have someone place chocks under the trailer wheels.
When the wheel chocks are in place, release the
regular brakes until the chocks absorb the load. Reapply the regular brakes. Then shift into
PARK
(P) firmly and apply your parking brakes.
Release the regular brakes.
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
Be 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 s‘6~1&@kt 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 booklet
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
adjustment. If you’re trailering, it’s a good idea to
review these sections 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 “Engine Overheating”
in the Index.
4-38

Downloaded from www.Manualslib.com manuals search engine Service
Your dealer knows your vehicle best and wants you to
be happy with it. We hope you’ll go to your dealer for
all your service needs. You’ll get genuine GM parts and
GM-trained and supported service people.
We hope you’ll want
to keep your GM vehicle all GM.
Genuine GM parts have one of these marks:
Genuine
Doing Your Own Service Work
If you want to do some of your own service work, you’ll
want
to use the proper Cadillac Service Manual. It tells
you much more about how to service your vehicle than
this manual can.
To order the proper service manual,
see “Service and Owner Publications’’ in the Index.
Your vehicle has
an air bag system. Before attempting to
do your own service work, see “Servicing Your Air
Bag-Equipped Vshicle” in the Index.
You should keep a record with all parts receipts and
list the mileage and the date
of any service work you
perform. See “Maintenance Record” in the Maintenance
Schedule Booklet.
6-2

Downloaded from www.Manualslib.com manuals search engine 6. Take out the air cleaner filter and remove any
loose debris that may be found laying in the air
cleaner base.
7. Install a new air filter element. See “Normal
Maintenance Replacement
Parts” in the Index. Follow these steps to reinstall the air cleaner assembly:
1.
2.
3.
4.
5.
Slide
the air cleaner lid into the slots in the front
edge of
the air cleaner base.
Pivot the air cleaner cover and the air duct assembly
downward. Make sure that both latches
are secure
and fully engaged.
Reinstall the clean air duct over the mass airflow sensor. Make sure that the duct is secure around the
entire outer edge
of the sensor.
Tighten the air duct clamp.
Reconnect the IAT sensor.
Refer
to the Maintenance Schedule to determine when to
replace the air filter.
See “Scheduled Maintenance Services” in the
Maintenance Schedule booklet.

Downloaded from www.Manualslib.com manuals search engine Automatic Transaxle Fluid
Operating the engine with the air cleaner 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
off.
NOTICE:
If the air cleaner is off, a backfke can cause a
damaging engine fire. And, dirt can easily get
into your engine, which will damage it. Always
have the air cleaner in place when you’re driving.
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:
0 In heavy city traffic where the outside temperature
0 In hilly or mountainous terrain. regularly reaches
90°F (32°C) or higher.
0 When doing frequent trailer towing.
0 Uses such as found in taxi, police or delivery service.
0 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 “Scheduled Maintenance Services” in the
Maintenance Schedule booklet.
6-18

Downloaded from www.Manualslib.com manuals search engine Then, without shutting off the engine, follow these steps:
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1. The black transaxle fluid cap is located next to the
radiator hose and below the air cleaner assembly on
the driver’s side of the engine. Remove the air
cleaner assembly
so you can reach the transaxle fluid
cap. The assembly
is attached to the vehicle by two
fasteners. Lift up on the air cleaner assembly to
remove it.
2. Find the transaxle fluid cap and turn it to the left
to remove.
3. Pull out the dipstick and wipe it with a clean rag or
4. Push it back in all the way, wait three seconds and
paper towel.
then pull it back out again.
5. Check both sides of the dipstick, and read the
lower level. The fluid level must be in the
cross-hatched area.
6. If the fluid level is in the acceptable range, push
the dipstick back in all the way. Replace the
air
cleaner assembly.
How to Add Fluid
Refer to the Maintenance Schedule to determine
what kind of transaxle fluid to use. See “Recommended
Fluids and Lubricants” in the Maintenance
Schedule booklet.
6-20

Downloaded from www.Manualslib.com manuals search engine Power Steering Fluid
The power steering fluid
reservoir is located next to
the coolant surge.tank on
the passenger’s side of
the engine.
When to Check Power Steering Fluid
It is not necessary to regularly check power steering
fluid unless you suspect there is a leak in the system or
you hear an unusual noise. A fluid loss in this system
could indicate a problem. Have the system inspected
and repaired.
How To Check Power Steering Fluid
When the engine compartment is cool, wipe the cap
and the top
of the reservoir clean, then unscrew the cap
and wipe the dipstick with a clean rag. Replace the cap
and completely tighten it. Then remove the cap again
and look at the fluid level on the dipstick.
The level should be at the
FULL COLD mark. If
necessary, add only enough fluid to bring the level up
to the mark.
What to Use
To determine what kind of fluid to use, see
“Recommended Fluids and Lubricants” in the
Maintenance Schedule booklet. Always use the
proper fluid. Failure to use the proper fluid can cause
leaks and damage hoses and seals.
Windshield Washer Fluid
What to Use
When you need windshield washer fluid, be sure to read
the manufacturer’s instructions before use.
If you will be
operating your vehicle in an area where the temperature
may fall below freezing, use a fluid that has sufficient
protection against freezing.
6-26
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