2015 CADILLAC XTS SEDAN warning

Black plate (9,1)Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-7707485) -
2015 - CRC - 10/31/14
Vehicle Care 10-9
3.6L V6 Engine Twin Turbo
1. Engine Oil Fill Cap
2. Engine Cover Bolt
3. Engine Cover
To remove:
1. Remove the oil fill cap (1).
2. Remove the engine coverbolt (2).
3. Raise the engine cover (3) to release it from the retainers.
4. Lift and remove the engine cover. 5. Reverse Steps 1–4 to reinstall
the engine cover.
Engine Oil
To ensure proper engine
performance and long life, careful
attention must be paid to engine oil.
Following these simple, but
important steps will help protect
your investment:
.Always use engine oil approved
to the proper specification and of
the proper viscosity grade. See
“Selecting the Right Engine Oil”
in this section.
.Check the engine oil level
regularly and maintain the
proper oil level. See “Checking
Engine Oil” and“When to Add
Engine Oil” in this section.
.Change the engine oil at the
appropriate time. See Engine Oil
Life System on page 10-11.
.Always dispose of engine oil
properly. See “What to Do with
Used Oil” in this section.
Checking Engine Oil
It is a good idea to check the engine
oil level at each fuel fill. In order to
get an accurate reading, the vehicle
must be on level ground. The
engine oil dipstick handle is a loop.
SeeEngine Compartment Overview
on page 10-5 for the location of the
engine oil dipstick.
1. If the engine has been running recently, turn off the engine and
allow several minutes for the oil
to drain back into the oil pan.
Checking the oil level too soon
after engine shutoff will not
provide an accurate oil level
reading.
{Warning
The engine oil dipstick handle
may be hot; it could burn you.
Use a towel or glove to touch the
dipstick handle.

Black plate (11,1)Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-7707485) -
2015 - CRC - 10/31/14
Vehicle Care 10-11
{Caution
Failure to use the recommended
engine oil can result in engine
damage not covered by the
vehicle warranty. Check with your
dealer or service provider on
whether the oil is approved to the
dexos1 specification.
Viscosity Grade
Use SAE 5W-30 viscosity grade
engine oil.
Cold Temperature Operation: In an
area of extreme cold, where the
temperature falls below −29 °C
(−20 °F), an SAE 0W-30 oil may be
used. An oil of this viscosity grade
will provide easier cold starting for
the engine at extremely low
temperatures. When selecting an oil
of the appropriate viscosity grade,
always select an oil of the correct
specification. See “Specification”
earlier in this section.
Engine Oil Additives/Engine
Oil Flushes
Do not add anything to the oil. The
recommended oils meeting the
dexos1 specification are all that is
needed for good performance and
engine protection.
Engine oil system flushes are not
recommended and could cause
engine damage not covered by the
vehicle warranty.
What to Do with Used Oil
Used engine oil contains certain
elements that can be unhealthy for
your skin and could even cause
cancer. Do not 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 dispose of 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 threat to the
environment. If you change your
own oil, be sure to drain all the oil from the filter before disposal. Never
dispose of oil by putting it in the
trash or pouring it on the ground,
into sewers, or into streams or
bodies of water. Recycle it by taking
it to a place that collects used oil.
Engine Oil Life System
When to Change Engine Oil
This vehicle has a computer system
that indicates when to change the
engine oil and filter. This is based
on a combination of factors which
include engine revolutions, engine
temperature, and miles driven.
Based on driving conditions, the
mileage at which an oil change is
indicated can vary considerably. For
the oil life system to work properly,
the system must be reset every time
the oil is changed.
When the system has calculated
that oil life has been diminished, it
indicates that an oil change is
necessary. A CHANGE ENGINE
OIL SOON message comes on. See
Engine Oil Messages on page 5-39.

Black plate (14,1)Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-7707485) -
2015 - CRC - 10/31/14
10-14 Vehicle Care
3.6L V6 Engine Twin Turbo
1. Screws
2. Secondary Air Hose
3. Lower Air Duct Clamp
4. Lower Electrical Connector
5. Upper Electrical Connector
6. Upper Air Duct Clamp
1. Disconnect the lower and upperoutlet ducts by loosening the
lower (3) and upper (6) air duct
clamps.
2. Disconnect the lower (4) and upper (5) electrical connectors
and wiring attachments from the
cover.
3. Remove the screws (1) on top of the cover.
4. Lift the filter cover housing away from the engine.
5. Pull out the filter.
6. Inspect or replace the engine air cleaner/filter.
7. Reverse Steps 1–5 to reinstall the filter cover housing.
{Warning
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
helps to stop flames if the engine
backfires. Use caution when
working on the engine and do not
drive with the air cleaner/filter off.
{Caution
If the air cleaner/filter is off, dirt
can easily get into the engine,
which could damage it. Always
have the air cleaner/filter in place
when you are driving.
Cooling System
The cooling system allows the
engine to maintain the correct
working temperature.

Black plate (15,1)Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-7707485) -
2015 - CRC - 10/31/14
Vehicle Care 10-15
3.6L V6 Engine
1. Electric Engine Cooling Fans(Out of View)
2. Coolant Surge Tank and Pressure Cap
3.6L V6 Engine Twin Turbo
1. Electric Engine Cooling Fans(Out of View)
2. Charged Air Coolant (CAC) Bottle and Pressure Cap
3. Coolant Surge Tank and Pressure Cap
{Warning
An electric engine cooling fan
under the hood can start up even
when the engine is not running
(Continued)
Warning (Continued)
and can cause injury. Keep
hands, clothing, and tools away
from any underhood electric fan.
{Warning
Heater and radiator hoses, and
other engine parts, can be very
hot. Do not touch them. If you do,
you can be burned.
Do not run the engine if there is a
leak. If you run the engine, it
could lose all coolant. That could
cause an engine fire, and you
could be burned. Get any leak
fixed before you drive the vehicle.

Black plate (16,1)Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-7707485) -
2015 - CRC - 10/31/14
10-16 Vehicle Care
{Caution
Using coolant other than
DEX-COOL®can cause
premature engine, heater core,
or radiator corrosion. In addition,
the engine coolant could require
changing sooner. Any repairs
would not be covered by the
vehicle warranty. Always use
DEX-COOL (silicate-free) coolant
in the vehicle.
Engine Coolant
The engine and Charged Air
Coolant (CAC) cooling systems in
the vehicle are filled with
DEX-COOL
®engine coolant
mixture. See Recommended Fluids
and Lubricants on page 11-13 and
Maintenance Schedule on
page 11-4.
The following explains the cooling
systems and how to check and add
coolant when it is low. If there is a problem with engine overheating,
see
Engine Overheating on
page 10-19.
What to Use
{Warning
Adding only plain water or some
other liquid to the cooling system
can be dangerous. Plain water
and other liquids, can boil before
the proper coolant mixture will.
The coolant warning system is set
for the proper coolant mixture.
With plain water or the wrong
mixture, the engine could get too
hot but you would not get the
overheat warning. The engine
could catch fire and you or
others could be burned. Use a
50/50 mixture of clean, drinkable
water and DEX-COOL coolant. Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
coolant. If using this mixture,
nothing else needs to be added.
This mixture:
.Gives freezing protection down
to
−37°C (−34°F), outside
temperature.
.Gives boiling protection up to
129°C (265°F), engine
temperature.
.Protects against rust and
corrosion.
.Will not damage aluminum parts.
.Helps keep the proper engine
temperature.
{Caution
If improper coolant mixture,
inhibitors, or additives are used in
the vehicle cooling system, the
engine could overheat and be
damaged. Too much water in the
(Continued)

Black plate (17,1)Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-7707485) -
2015 - CRC - 10/31/14
Vehicle Care 10-17
Caution (Continued)
mixture can freeze and crack
engine cooling parts. The repairs
would not be covered by the
vehicle warranty. Use only the
proper mixture of engine coolant
for the cooling system. See
Recommended Fluids and
Lubricants on page 11-13.
Never dispose of engine coolant by
putting it in the trash, pouring it on
the ground, or pouring into sewers,
streams, or bodies of water. Have
the coolant changed by an
authorized service center, familiar
with legal requirements regarding
used coolant disposal. This will help
protect the environment and your
health.
Checking Coolant
The vehicle must be on a level
surface when checking the coolant
level.
The engine coolant surge tank and
CAC bottle are in the engine
compartment on the driver side of
the vehicle. See Engine
Compartment Overview on
page 10-5.
Check to see if coolant is visible in
the surge tank and CAC bottle.
If the coolant inside the surge tank
is boiling, do not do anything else
until it cools down. If coolant is
visible but the coolant level is
not at or above the mark pointed to
on the surge tank or at the CAC
bottle COLD FILL mark, add a
50/50 mixture of clean, drinkable
water and DEX-COOL coolant.
Be sure the cooling system is cool
before this is done. If no coolant is visible in the coolant
surge tank or CAC bottle, add
coolant as follows:
How to Add Coolant to the
Surge Tank
{Warning
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. Do not spill
coolant on a hot engine.
{Caution
This vehicle has a specific
coolant fill procedure. Failure to
follow this procedure could cause
the engine to overheat and be
severely damaged.

Black plate (18,1)Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-7707485) -
2015 - CRC - 10/31/14
10-18 Vehicle Care
{Warning
Steam and scalding liquids from a
hot cooling system can blow out
and burn you badly. Never turn
the cap when the cooling system,
including the surge tank pressure
cap, is hot. Wait for the cooling
system and surge tank pressure
cap to cool.
The coolant surge tank pressure
cap can be removed when the
cooling system, including the surge
tank pressure cap and upper
radiator hose, is no longer hot.1. Turn the pressure cap slowly
counterclockwise. If a hiss is
heard, wait for that to stop.
A hiss means there is still some
pressure left.
2. Keep turning the pressure cap slowly and remove it.
3. Fill the coolant surge tank with the proper mixture to the mark
pointed to on the front of the
coolant surge tank.
4. With the coolant surge tank pressure cap off, start the
engine and let it run until you
can feel the upper radiator hose
getting hot. Watch out for the
engine cooling fans. By this
time, the coolant level inside the
coolant surge tank may be
lower. If the level is lower, add
more of the proper mixture to the
coolant surge tank until the level
reaches the mark pointed to on
the front of the coolant
surge tank.
5. Replace the pressure cap tightly.
How to Add Coolant to the
CAC Bottle
{Warning
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. Do not spill
coolant on a hot engine.
{Caution
This vehicle has a specific
coolant fill procedure. Failure to
follow this procedure could cause
the engine to overheat and be
severely damaged.

Black plate (19,1)Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-7707485) -
2015 - CRC - 10/31/14
Vehicle Care 10-19
The CAC bottle pressure cap can
be removed when the Charged Air
Coolant cooling system, including
the CAC bottle pressure cap, is no
longer hot.
1. Turn the pressure cap slowlycounterclockwise and remove it.
2. Fill the CAC bottle with the proper mixture to the COLD FILL
mark pointed to on the front of
the CAC bottle.
3. Replace the pressure cap tightly.
Engine Overheating
The vehicle has an engine coolant
temperature gauge and an engine
temperature light to warn of engine
overheating. There are also engine hot
messages that may be displayed in
the Driver Information Center (DIC).
See
Engine Cooling System
Messages on page 5-38.
If the decision is made not to lift the
hood when one of these warnings
appears, but get service help right
away. See Roadside Service on
page 13-5.
If the decision is made to lift the
hood, make sure the vehicle is
parked on a level surface.
Then check to see if the engine
cooling fans are running. If the
engine is overheating, the fans
should be running. If they are not,
do not continue to run the engine
and have the vehicle serviced.{Caution
Running the engine without
coolant may cause damage or a
fire. Vehicle damage would not be
(Continued)
Caution (Continued)
covered by the vehicle warranty.
SeeOverheated Engine
Protection Operating Mode on
page 10-20 for information on
driving to a safe place in an
emergency.
If Steam Is Coming from the
Engine Compartment
{Warning
Steam from an overheated engine
can burn you badly, even if you
just open the hood. Stay away
from the engine if you see or hear
steam coming from it. Just turn it
off and get everyone away from
the vehicle until it cools down.
Wait until there is no sign of
steam or coolant before you open
the hood.
(Continued)