display CADILLAC DEVILLE 1999 7.G Repair Manual

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5-9 Overheated Engine Protection
Operating Mode
Should an overheated engine condition exist and the
message ENGINE OVERHEATED, STOP ENGINE is
displayed, an overheat protection mode which alternates
firing groups of cylinders helps prevent engine damage.
In this mode, you will notice a loss in power and engine
performance. This operating mode allows your vehicle
to be driven to a safe place in an emergency; you may
drive up to 50 miles (80 km). Towing a trailer in the
overheat protection mode should be avoided.
NOTICE:
After driving in the overheated engine protection
operating mode, to avoid engine damage, allow the
engine to cool before attempting any repair. The
engine oil will be severely degraded. Repair the
cause of coolant loss, change the oil and reset the
oil life indicator. See ªEngine Oilº in the Index.
If Steam Is Coming From Your Engine

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6-11 Underhood Lamp
Turn the parking lamps on to operate the underhood
lamp. The underhood lamp will come on when the hood
is opened.
Engine Oil
A CHECK OIL LEVEL message will appear when the
engine oil is approximately 1 quart (1L) low. If the
message is displayed, check the dipstick level and add
oil as needed.It's a good idea to check your engine oil every time you
get fuel. In order to get an accurate reading, the oil must
be warm and the vehicle must be on level ground.
The engine oil dipstick is
located behind the radiator
on the driver's side of the
engine. The black handle
says ENGINE OIL on it.
Turn off the engine and give the oil several minutes to
drain back into the oil pan. If you don't, the oil dipstick
might not show the actual level.

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6-15
How to Reset the Oil Life Indicator
After the oil has been changed, display the OIL LIFE
LEFT message by pressing the INFORMATION SKIP
(SKIP INFO) button. Then press and hold the RESET
NO (NO INFO RESET) button until the display shows
100% ENGINE OIL LIFE. This resets the oil life index.
The percentage of oil life remaining may be checked at
any time by pressing the INFORMATION SKIP (SKIP
INFO) button several times until the OIL LIFE LEFT
message appears. For more information on the oil life
feature, see ªOil Life Indicatorº in the Index.What to Do with Used Oil
Did you know that used engine oil contains certain
elements that may be unhealthy for your skin and could
even cause cancer? Don't let used oil stay on your skin
for very long. Clean your skin and nails with soap and
water, or a good hand cleaner. Wash or properly throw
away clothing or rags containing used engine oil. (See
the manufacturer's warnings about the use and disposal
of oil products.)
Used oil can be a real threat to the environment. If you
change your own oil, be sure to drain all free
-flowing oil
from the filter before disposal. Don't ever dispose of oil
by putting it in the trash, pouring it on the ground, into
sewers, or into streams or bodies of water. Instead,
recycle it by taking it to a place that collects used oil. If
you have a problem properly disposing of your used oil,
ask your dealer, a service station or a local recycling
center for help.

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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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6-27 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
ªRecommended Fluids and Lubricantsº 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.
Adding Washer Fluid
The CHECK WASHER FLUID message will be
displayed on the Driver's Information Center (DIC)
when the fluid is low.
The windshield washer fluid reservoir is located next to
the air cleaner on the driver's side of the engine.

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8-4
Customer Assistance
For Text Telephone Users 7-3 . . . . . . . . . . . . . . . . . . . . . . .
Information 7-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Offices 7-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Customer Satisfaction Procedure 7-2 . . . . . . . . . . . . . . . . . . . .
CVRSS 2-95 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Damage, Finish 6-56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Damage, Sheet Metal 6-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Daytime Running Lamps 2-43 . . . . . . . . . . . . . . . . . . . . . . . . .
Dead Battery 5-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Defects, Reporting Safety 7-10, 7-11 . . . . . . . . . . . . . . . . . . .
Defensive Driving 4-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Defogger, Rear Window 3-11 . . . . . . . . . . . . . . . . . . . . . . . . .
Defogging and Defrosting 3-10 . . . . . . . . . . . . . . . . . . . . . . . .
DIC 2-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DIC Controls and Displays 2-79 . . . . . . . . . . . . . . . . . . . . . . .
DIC Messages 2-82 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Digital Cluster Climate Control Panel 3-2 . . . . . . . . . . . . . . . .
Digital Control Buttons 2-79 . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions, Vehicle 6-70 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dolby Noise Reduction 3-17, 3-21, 3-30 . . . . . . . . . . . . . . . .
Door
Ajar Message 2
-84 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Central Unlocking System 2-5 . . . . . . . . . . . . . . . . . . . . . . .
Fuel Release 6-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Locks 2-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Map Pocket 2-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driver Door Ajar Message 2-85 . . . . . . . . . . . . . . . . . . . . . . . .
Driver Information Center (DIC) 2-79 . . . . . . . . . . . . . . . . . . . Driver Position 1
-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driver's Outside Auto-Dimming Rearview Mirror 2-52 . . . . .
Driving
City 4
-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Defensive 4-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Drunken 4-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Freeway 4-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In a Blizzard 4-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In Foreign Countries 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . .
In Rain and on Wet Roads 4-17 . . . . . . . . . . . . . . . . . . . . . .
Night 4-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
On Curves 4-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
On Grades While Towing a Trailer 4-38 . . . . . . . . . . . . . . .
On Hill and Mountain Roads 4-23 . . . . . . . . . . . . . . . . . . . .
On Snow and Ice 4-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Through Water 4-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Winter 4-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
With a Trailer 4-36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DRL 2-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Drunken Driving 4-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dual Temperature Control 3-3, 3-6 . . . . . . . . . . . . . . . . . . . . .
ECC 3-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Equipment, Adding 2-21, 3-39, 6-59 . . . . . . . . . . .
Electrical System 6-59 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrochromic Day/Night Rearview Mirror
with Compass 2
-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronic Climate Control (ECC) 3-2 . . . . . . . . . . . . . . . . . . .
Electronic Level Control 4-31 . . . . . . . . . . . . . . . . . . . . . . . . .
Electronic Solar Sensor 3-9 . . . . . . . . . . . . . . . . . . . . . . . . . . .