2003 CADILLAC SEVILLE coolant temperature

In very cold weather, 0ÉF (-18ÉC) or colder, the engine
coolant heater can help. You'll get easier starting
and better fuel economy during engine warm-up.
Usually, the coolant heater should be plugged in a
minimum of four hours prior to starting your vehicle. At
temperatures above 32ÉF (0ÉC), use of the coolant
heater is not required.
To Use the Engine Coolant Heater
1. Turn off the engine.
2. Open the hood and unwrap the electrical cord.
The electrical cord is located on the driver's side
of the engine, behind the transaxle dipstick/¯uid ®ll
location (C) and next to the engine.
3. Plug it into a normal, grounded 110-volt AC outlet.
{CAUTION:
Plugging the cord into an ungrounded outlet
could cause an electrical shock. Also, the
wrong kind of extension cord could overheat
and cause a ®re. You could be seriously injured.
CAUTION: (Continued)
CAUTION: (Continued)
Plug the cord into a properly grounded
three-prong 110-volt AC outlet. If the cord will
not reach, use a heavy-duty three-prong
extension cord rated for at least 15 amps.
4. Before starting the engine, be sure to unplug and
store the cord as it was before to keep it away
from moving engine parts. If you don't, it could be
damaged.
How long should you keep the coolant heater plugged
in? The answer depends on the outside temperature, the
kind of oil you have, and some other things. Instead
of trying to list everything here, we ask that you contact
your dealer in the area where you'll be parking your
vehicle. The dealer can give you the best advice for that
particular area.
2-27

Instrument Panel Overview...............................3-4
Hazard Warning Flashers................................3-6
Other Warning Devices...................................3-7
Horn.............................................................3-7
Tilt Wheel.....................................................3-7
Turn Signal/Multifunction Lever.........................3-9
Exterior Lamps.............................................3-16
Interior Lamps..............................................3-21
Ultrasonic Rear Parking
Assist (URPA)...........................................3-24
Accessory Power Outlets...............................3-26
Ashtrays and Cigarette Lighter........................3-27
Climate Controls............................................3-28
Dual Climate Control System..........................3-28
Outlet Adjustment.........................................3-33
Rear Climate Control System.........................3-34
Passenger Compartment Air Filter...................3-35
Steering Wheel Climate Controls.....................3-35
Climate Controls Personalization.....................3-36
Warning Lights, Gages and Indicators.............3-37
Instrument Panel Cluster................................3-38
Speedometer and Odometer...........................3-39
Tachometer.................................................3-41Safety Belt Reminder Light.............................3-41
Air Bag Readiness Light................................3-42
Charging System Light..................................3-43
Brake System Warning and Parking Brake
Indicator Light...........................................3-43
Anti-Lock Brake System Warning Light.............3-44
Traction Control System (TCS)
Warning Light...........................................3-45
Engine Coolant Temperature Warning Light......3-46
Engine Coolant Temperature Gage..................3-46
Malfunction Indicator Lamp.............................3-47
Oil Pressure Light.........................................3-50
Security Light...............................................3-51
Fog Lamp Light............................................3-51
Lights On Reminder......................................3-51
Cruise Control Light......................................3-51
Fuel Gage...................................................3-52
Driver Information Center (DIC).......................3-53
DIC Controls and Displays.............................3-53
DIC Warnings and Messages.........................3-56
Climate Controls and Radio System
Personalization..........................................3-63
DIC Vehicle Personalization............................3-64
Section 3 Instrument Panel
3-1

Engine Coolant Temperature
Warning Light
This light tells you that
your engine has
overheated. As a check,
the light should come
on for a few seconds when
you start your engine.
If this light comes on and stays on, you should
stop your vehicle and turn the engine off as soon as
possible. A warning chime should also sound if this light
comes on.
See
Engine Overheating on page 5-28.
Engine Coolant Temperature Gage
This gage shows the engine coolant temperature. If the
gage pointer moves into the shaded area, the engine
is too hot.
That reading means the same thing as the warning
light ± the engine coolant has overheated. See
Engine
Overheating on page 5-28.
United StatesCanada
3-46

CHECK WASHER FLUID ± 25:This message means
that your vehicle is low on windshield washer ¯uid.
See
Windshield Washer Fluid on page 5-39.
DRIVER DOOR AJAR ± 140:This message will
display anytime the key is in ON, the transaxle is not in
PARK (P) and the driver's door is open or ajar. A
chime will sound when the vehicle's speed is greater
than 3 mph (4.8 km/h).
DRIVE NO. X (1 OR 2):This message will be displayed
with the key in ON and while entering FEATURE
PROGRAMMING, but only if the vehicle is equipped
with memory seats. The message will show which driver
is activating the personalization feature. It will only
stay on for ®ve seconds. This message can be
customized for you by your dealer.
ENGINE COOLANT HOT, IDLE ENGINE ± 44:This
message will appear when the engine coolant
temperature is over 262ÉF (128ÉC). Stop and allow your
vehicle to idle in PARK (P) until it cools down and the
message is removed. Do not increase engine speed
above a normal idle. If it does not cool down, turn off the
engine and have it serviced before driving it again.
Severe engine damage can result from an overheated
engine. See
Engine Overheating on page 5-28.ENGINE HOT±AC OFF ± 16:This message displays
when the engine coolant becomes hotter than the normal
operating temperature. To avoid added strain on a hot
engine, the air conditioning compressor is automatically
turned off. When the coolant temperature returns to
normal, the A/C operation will automatically resume. You
can continue to drive your vehicle. If this message
continues to appear, have the system repaired as soon
as possible to avoid compressor damage.
ENGINE OVERHEATED, STOP ENGINE ± 42:This
message will appear when the engine has overheated.
Stop and turn the engine off immediately to avoid
severe engine damage. See
Engine Overheating on
page 5-28. A multiple chime will also sound when this
message is displayed.
ENGINE POWER REDUCED ± 41:This message
informs you that the vehicle is reducing engine power
because the transaxle is being placed in gear under
conditions that may cause damage to the vehicle's
engine, transaxle or ability to accelerate.
FUEL LEVEL LOW ± 11:This message serves as a
warning that the fuel level in the tank is critically
low. Stop for fuel soon. A single chime will sound when
this message is displayed.
3-59

Engine Coolant
The cooling system in your vehicle is ®lled with
DEX-COOLžengine coolant. This coolant is designed
to remain in your vehicle for 5 years or 150,000 miles
(240 000 km), whichever occurs ®rst, if you add
only DEX-COOL
žextended life coolant.
The following explains your cooling system and how to
add coolant when it is low. If you have a problem
with engine overheating, see
Engine Overheating on
page 5-28.
A 50/50 mixture of clean, drinkable water and
DEX-COOL
žcoolant will:
·Give freezing protection down to-34É F (-37É C).
·Give boiling protection up to 265É F (129É C).
·Protect against rust and corrosion.
·Help keep the proper engine temperature.
·Let the warning lights and gages work as they
should.
Notice:When adding coolant, it is important that
you use only DEX-COOLž(silicate-free) coolant.
If coolant other than DEX-COOLžis added to
the system, premature engine, heater core or
radiator corrosion may result. In addition, the engine
coolant will require change sooner -- at 30,000 miles
(50,000 km) or 24 months, whichever occurs ®rst.
Damage caused by the use of coolant other
than DEX-COOL
žis not covered by your new vehicle
warranty.
5-25

Adding Coolant
If you need more coolant, add the proper DEX-COOLž
coolant mixtureat the surge tank, but only when the
engine is cool.
{CAUTION:
You can be burned if you spill coolant on hot
engine parts. Coolant contains ethylene glycol,
and it will burn if the engine parts are hot
enough. Don't spill coolant on a hot engine.
When replacing the pressure cap, make sure it is
hand-tight.
Coolant Surge Tank Pressure Cap
Notice:Your coolant surge tank pressure cap is a
pressure-type cap and must be tightly installed
to prevent coolant loss and possible engine damage
from overheating. Two and one-half turns are
required to seal the cap. See ªEngine Compartment
Overviewº in the Index for more information on
location.
Engine Overheating
You will ®nd an ENGINE COOLANT HOT, IDLE
ENGINE message or an ENGINE OVERHEATED,
STOP ENGINE message displayed in the Driver
Information Center (DIC). You will also hear a chime.
There is also an engine temperature warning light and/or
gage on the instrument panel cluster. See
Engine
Coolant Temperature Warning Light on page 3-46andEngine Coolant Temperature Gage on page 3-46.
Overheated Engine Protection
Operating Mode
If an overheated engine condition exists and the
message ENGINE OVERHEATED, STOP ENGINE is
displayed, an overheat protection mode which alternates
®ring 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). Driving extended
miles (km) and/or towing a trailer in the overheat
protection mode should be avoided.
5-28

If No Steam Is Coming From Your
Engine
An overheat warning, along with a low coolant message,
can indicate a serious problem. SeeDIC Warnings
and Messages on page 3-56.
If you get an engine overheat warning with no low
coolant message, but see or hear no steam, the problem
may not be too serious. Sometimes the engine can
get a little too hot when you:
·Climb a long hill on a hot day.
·Stop after high-speed driving.
·Idle for long periods in traffic.
·Tow a trailer.
If you get the overheat warning with no sign of steam,
try this for a minute or so:
1. In heavy traffic, let the engine idle in NEUTRAL (N)
while stopped. If it safe to do so, pull of the road,
shift to PARK (P) or NEUTRAL (N) and let the
engine idle.
2. Set the temperature control to the highest heat
setting and open the windows, as necessary.If you no longer have the overheat warning, you can
drive. Just to be safe, drive slower for about 10 minutes.
If the warning doesn't come back on, you can drive
normally.
If the warning continues, pull over, stop, and park your
vehicle right away.
If there's still no sign of steam, idle the engine for three
minutes while you're parked. If you still have the
warning,
turn off the engine and get everyone out of the
vehicleuntil it cools down. Also, see ªOverheated
Engine Protection Operating Modeº listed previously in
this section.
You may decide not to lift the hood but to get service
help right away.
5-30

Windshield Washer Fluid
What to Use
When you need windshield washer ¯uid, 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 ¯uid that has
sufficient protection against freezing.
Adding Washer Fluid
When your vehicle's windshield washer ¯uid level
becomes low, a CHECK WASHER FLUID message will
appear on the Driver Information Center (DIC). You
will need to add ¯uid soon.
The windshield washer
¯uid reservoir is located
next to the underhood fuse
block on the passenger's
side of the vehicle.
See
Engine Compartment Overview on page 5-12for
reservoir location.
Open the cap with the washer symbol on it. Add washer
¯uid until the tank is full.
Notice:
·When using concentrated washer ¯uid,
follow the manufacturer's instructions for
adding water.
·Don't mix water with ready-to-use washer ¯uid.
Water can cause the solution to freeze and
damage your washer ¯uid tank and other parts
of the washer system. Also, water doesn't
clean as well as washer ¯uid.
·Fill your washer ¯uid tank only three-quarters
full when it's very cold. This allows for
expansion if freezing occurs, which could
damage the tank if it is completely full.
·Don't use engine coolant (antifreeze) in your
windshield washer. It can damage your
washer system and paint.
5-39