engine coolant CADILLAC XTS 2019 User Guide

Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-12032610) -
2019 - crc - 8/22/18
VEHICLE CARE 251
What to Use
{Warning
Plain water, or other liquids such as
alcohol, can boil before the proper
coolant mixture will. With plain
water or the wrong mixture, the
engine could get too hot but there
would not be an 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. 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
Do not use anything other than a
mix of DEX-COOL coolant that
meets GM Standard GMW3420 and
clean, drinkable water. Anything
else can cause damage to the
engine cooling system and the
vehicle, which would not be covered
by the vehicle warranty.
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 0240.
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:

Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-12032610) -
2019 - crc - 8/22/18
252 VEHICLE CARE
How to Add Coolant to the
Surge Tank
{Warning
Plain water, or other liquids such as
alcohol, can boil before the proper
coolant mixture will. With plain
water or the wrong mixture, the
engine could get too hot but there
would not be an overheat warning.
The engine could catch fire and you
or others could be burned.
{Warning
Spilling coolant on hot engine parts
can burn you. Coolant contains
ethylene glycol and it will burn if
the engine parts are hot enough.
Caution
Failure to follow the specific
coolant fill procedure could cause
the engine to overheat and could
cause system damage. If coolant is
not visible in the surge tank,
contact your dealer.
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.
6. Verify coolant level after the engine is shut off and the
coolant is cold. If necessary,
repeat coolant fill procedure
Steps 1–5.

Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-12032610) -
2019 - crc - 8/22/18
VEHICLE CARE 253
Caution
If the pressure cap is not tightly
installed, coolant loss and engine
damage may occur. Be sure the cap
is properly and tightly secured.
How to Add Coolant to the CAC
Bottle
{Warning
Spilling coolant on hot engine parts
can burn you. Coolant contains
ethylene glycol and it will burn if
the engine parts are hot enough.
Caution
Failure to follow the specific
coolant fill procedure could cause
the engine to overheat and could
cause system damage. If coolant is
not visible in the surge tank,
contact your dealer.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 slowly
counterclockwise 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.
Caution
If the pressure cap is not tightly
installed, coolant loss and engine
damage may occur. Be sure the cap
is properly and tightly secured.
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 display in the Driver
Information Center (DIC).
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 0343.
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. Have the
vehicle serviced.

Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-12032610) -
2019 - crc - 8/22/18
254 VEHICLE CARE
Caution
Do not run the engine if there is a
leak in the engine cooling system.
This can cause a loss of all coolant
and can damage the system and
vehicle. Have any leaks fixed
right away.
If Steam Is Coming from the
Engine Compartment
{Warning
Steam and scalding liquids from a
hot cooling system are under
pressure. Turning the pressure cap,
even a little, can cause them to
come out at high speed and you
could be burned. Never turn the cap
when the cooling system, including
the pressure cap, is hot. Wait for
the cooling system and pressure
cap to cool.
If No Steam Is Coming from the
Engine Compartment
If an engine overheat warning is
displayed but no steam can be seen or
heard, the problem may not be too
serious. Sometimes the engine can get
a little too hot when the vehicle:
.Climbs a long hill on a hot day.
. Stops after high-speed driving.
. Idles for long periods in traffic.
. Tows a trailer.
If the overheat warning is displayed
with no sign of steam: 1. Turn the air conditioning off.
2. Turn the heater on to the highest temperature and to the highest
fan speed. Open the windows as
necessary.
3. When it is safe to do so, pull off the road, shift to P (Park) or
N (Neutral), and let the
engine idle.
If the temperature overheat gauge is
no longer in the overheat zone or an
overheat warning no longer displays,
the vehicle can be driven. Continue to drive the vehicle slow for about
10 minutes. Keep a safe vehicle
distance from the car in front of you.
If the warning does not come back on,
continue to drive normally and have
the cooling system checked for proper
fill and function.
If the warning continues, pull over,
stop, and park the vehicle right away.
If there is no sign of steam, idle the
engine for three minutes while parked.
If the warning is still displayed, turn
off the engine until it cools down.
Also, see
“Overheated Engine
Protection Operating Mode ”next in
this section.
Overheated Engine
Protection Operating Mode
This emergency operating mode
allows the vehicle to be driven to a
safe place in an emergency situation.
If an overheated engine condition
exists, an overheat protection mode,
which alternates firing groups of
cylinders, helps prevent engine

Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-12032610) -
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VEHICLE CARE 255
damage. In this mode, there is
significant loss in power and engine
performance.
The engine coolant temperature
warning light comes on in the
instrument cluster, to indicate the
vehicle has entered overheated engine
protection operating mode. The
temperature gauge also indicates an
overheat condition exists. Driving
extended distances and/or towing a
trailer in the overheat protection
mode should be avoided.
Power Steering Fluid
(LF3 and LFX with AWD)
The power steering fluid reservoir is
under the engine cover on the
passenger side toward the rear of the
engine compartment. SeeEngine
Compartment Overview 0240.
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 an unusual noise is heard. A fluid
loss in this system could indicate a
problem. Have the system inspected
and repaired.
How to Check Power Steering
Fluid
Check the level when the engine
is cool.
To check the power steering fluid:
1. Remove the engine cover. Refer toEngine Cover 0243.
2. Wipe the cap and the top of the reservoir clean.
3. Turn the cap counterclockwise and pull it straight up.
4. Wipe the dipstick with a clean rag.
5. Replace the cap and completely tighten it. 6. Remove the cap again and look
at the fluid level on the dipstick.
The fluid level should be
between MIN and MAX on the
dipstick.
What to Use
To determine what kind of fluid to
use, see Recommended Fluids and
Lubricants 0332. Always use the
proper fluid.
Power Steering Fluid (LFX
with FWD)
The vehicle has electric power steering
and does not use power steering fluid.

Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-12032610) -
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256 VEHICLE CARE
Washer Fluid
What to Use
When windshield washer fluid is
needed, be sure to read the
manufacturer's instructions before
use. If operating the vehicle in an area
where the temperature may fall below
freezing, use a fluid that has sufficient
protection against freezing.
Adding Washer Fluid
The appropriate message will appear
in the Driver Information Center (DIC)
when the fluid level is low.
Open the cap with the washer symbol
on it. Add washer fluid until the tank
is full. SeeEngine Compartment
Overview 0240 for reservoir location.
Caution
.
Do not use washer fluid that
contains any type of water
repellent coating. This can
cause the wiper blades to
chatter or skip.
. Do not use engine coolant
(antifreeze) in the windshield
washer. It can damage the
windshield washer system
and paint.
. Do not mix water with
ready-to-use washer fluid.
Water can cause the solution
to freeze and damage the
washer fluid tank and other
parts of the washer system.
. When using concentrated
washer fluid, follow the
manufacturer instructions for
adding water.
. Fill the washer fluid tank only
three-quarters full when it is
very cold. This allows for
fluid expansion if freezing
(Continued)
Caution (Continued)
occurs, which could damage
the tank if it is
completely full.
Brakes
Disc brake pads have built-in wear
indicators that make a high-pitched
warning sound when the brake pads
are worn and new pads are needed.
The sound can come and go or can be
heard all the time when the vehicle is
moving, except when applying the
brake pedal firmly.
{Warning
The brake wear warning sound
means that soon the brakes will not
work well. That could lead to a
crash. When the brake wear
warning sound is heard, have the
vehicle serviced.

Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-12032610) -
2019 - crc - 8/22/18
SERVICE AND MAINTENANCE 323
is reset accidentally, service the
vehicle within 5 000 km/3,000 mi since
the last service. Reset the oil life
system when the oil is changed. See
Engine Oil Life System0246.
Air Conditioning Desiccant
(Replace Every Seven Years)
The air conditioning system requires
maintenance every seven years. This
service requires replacement of the
desiccant to help the longevity and
efficient operation of the air
conditioning system. This service can
be complex. See your dealer.
Tire Rotation and Required
Services Every 12 000 km/
7,500 mi
Rotate the tires, if recommended for
the vehicle, and perform the following
services. See Tire Rotation0285.
. Check engine oil level and oil
life percentage. If needed, change
engine oil and filter, and reset oil
life system.
See Engine Oil 0244 and Engine Oil
Life System 0246. .
Check engine coolant level. See
Cooling System 0250.
. Check windshield washer fluid
level. See Washer Fluid 0256.
. Check tire inflation pressures. See
Tire Pressure 0279.
. Inspect tire wear. See Tire
Inspection 0285.
. Visually check for fluid leaks.
. Inspect engine air cleaner filter.
See Engine Air Cleaner/Filter 0248.
. Inspect brake system. See Exterior
Care 0312.
. Visually inspect steering,
suspension, and chassis
components for damage, including
cracks or tears in the rubber boots,
loose or missing parts, or signs of
wear at least once a year. See
Exterior Care 0312.
. Inspect power steering for proper
attachment, connections, binding,
leaks, cracks, chafing, etc. .
Visually inspect halfshafts and
drive shafts for excessive wear,
lubricant leaks, and/or damage
including: tube dents or cracks,
constant velocity joint or universal
joint looseness, cracked or missing
boots, loose or missing boot
clamps, center bearing excessive
looseness, loose or missing
fasteners, and axle seal leaks.
. Check restraint system
components. See Safety System
Check 075.
. Visually inspect fuel system for
damage or leaks.
. Visually inspect exhaust system
and nearby heat shields for loose
or damaged parts.
. Lubricate body components. See
Exterior Care 0312.
. Check starter switch. See Starter
Switch Check 0259.

Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-12032610) -
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332 SERVICE AND MAINTENANCE
Recommended Fluids, Lubricants, and Parts
Recommended Fluids and Lubricants
UsageFluid/Lubricant
Automatic Transmission DEXRON-VI Automatic Transmission Fluid. Chassis Lubrication Chassis Lubricant (GM Part No. 12377985, in Canada 88901242) or lubricant
meeting requirements of NLGI #2, Category LB or GC-LB.
Electronic Limited-Slip Differential (eLSD) Hydraulic Apply Fluid GM Hydraulic Fluid (GM Part No. 88901975, in Canada 88901976).
Engine Coolant 50/50 mixture of clean, drinkable water and use only DEX-COOL Coolant. See
Cooling System 0250.
Engine Oil Engine oil meeting the dexos1 specification of the proper SAE viscosity grade.
ACDelco dexos1 full synthetic is recommended. See Engine Oil0244.
Hood Latch Assembly, Secondary Latch,
Pivots, Spring Anchor, and Release Pawl Lubriplate Lubricant Aerosol (GM Part No. 89021668, in Canada 89021674) or
lubricant meeting requirements of NLGI #2, Category LB or GC-LB.
Hydraulic Brake System DOT 3 Hydraulic Brake Fluid (GM Part No. 19353126, in Canada 19353127).
Hydraulic Power Steering System DEXRON-VI Automatic Transmission Fluid.
Key Lock Cylinders, Hood, and Door Hinges Multi-Purpose Lubricant, Superlube (GM Part No. 12346241, in
Canada 10953474).
Rear Axle (Non-Limited-Slip Differential) Rear Differential non-LSD Fluid (GM Part No. 88900401, in Canada 89021678).

Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-12032610) -
2019 - crc - 8/22/18
366 INDEX
CompartmentsStorage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Compass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Compressor Kit, Tire Sealant . . . . . . . 293
Connected Services Connections . . . . . . . . . . . . . . . . . . . . . . . 361
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . 363
Navigation . . . . . . . . . . . . . . . . . . . . . . . . . 360
Connections Connected Services . . . . . . . . . . . . . . . 361
Control
Traction and ElectronicStability . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Control of a Vehicle . . . . . . . . . . . . . . . . 174
Convenience Net . . . . . . . . . . . . . . . . . . . . 111
Convex Mirrors . . . . . . . . . . . . . . . . . . . . . . 44
Coolant Engine Temperature Gauge . . . . . . 128
Engine Temperature WarningLight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Cooling . . . . . . . . . . . . . . . . . . . . . . . . .163, 168
Cooling System . . . . . . . . . . . . . . . . . . . . . 250
Cornering Lamps . . . . . . . . . . . . . . . . . . . 159
Courtesy Lamps . . . . . . . . . . . . . . . . . . . . . 159
Courtesy Transportation
Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . 345
Cover Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243 Cruise Control . . . . . . . . . . . . . . . . . . . . . . . 199
Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Cruise Control, Adaptive . . . . . . . . . . . 202
Customer Assistance . . . . . . . . . . . . . . . 341 Offices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341
Text Telephone (TTY) Users . . . . . 341
Customer Information
Publications OrderingInformation . . . . . . . . . . . . . . . . . . . . . . 348
Customer Satisfaction Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . 339
D
Damage Repair, Collision . . . . . . . . . . . 346
Danger, Warning, and Caution . . . . . . . . 2
Data CollectionInfotainment System . . . . . . . . . . . . . 351
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 351
Data Recorders, Event . . . . . . . . . . . . . . 350
Daytime Running Lamps (DRL) . . . 157
Defensive Driving . . . . . . . . . . . . . . . . . . . 174
Delayed Locking . . . . . . . . . . . . . . . . . . . . . 37
Diagnostics Connected Services . . . . . . . . . . . . . . . 363
Distracted Driving . . . . . . . . . . . . . . . . . . 173
Dome Lamps . . . . . . . . . . . . . . . . . . . . . . . . 159
Door Ajar Light . . . . . . . . . . . . . . . . . . . . . . . . . 139 Door (cont'd)
Delayed Locking . . . . . . . . . . . . . . . . . . . . 37
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Power Locks . . . . . . . . . . . . . . . . . . . . . . . . . 37
Rear Seat Pass-Through . . . . . . . . . . . . 68
Drive Belt Routing, Engine . . . . . . . . . 338
Drive Systems All-Wheel Drive . . . . . . . . . . . . . . 193, 259
Driver Assistance Systems . . . . . . . . . 209
Driver Information
Center (DIC) . . . . . . . . . . . . . . . . . . . . . . . 139
Driving Assistance Systems . . . . . . . . . . . . . . . 217
Characteristics andTowing Tips . . . . . . . . . . . . . . . . . . . . . 230
Defensive . . . . . . . . . . . . . . . . . . . . . . . . . . 174
Drunk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
For Better Fuel Economy . . . . . . . . . . . 25
Hill and Mountain Roads . . . . . . . . 177
If the Vehicle is Stuck . . . . . . . . . . . . 179
Loss of Control . . . . . . . . . . . . . . . . . . . . 176
Off-Road Recovery . . . . . . . . . . . . . . . . 176
Vehicle Load Limits . . . . . . . . . . . . . . 179
Wet Roads . . . . . . . . . . . . . . . . . . . . . . . . . 176
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
Dual Automatic Climate Control System . . . . . . . . . . . . . . . . . . . . 163

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INDEX 367
E
Electric Parking Brake . . . . . . . . . . . . . . 194
Electric Parking Brake Light . . . . . . . 133
Electrical Equipment, Add-On . . . . . 235
Electrical SystemEngine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265
Fuses and Circuit Breakers . . . . . . . 265
Instrument Panel Fuse Block . . . . 268
Overload . . . . . . . . . . . . . . . . . . . . . . . . . . . 264
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270
Emergency OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 353
Engine Air Cleaner/Filter . . . . . . . . . . . . . . . . . 248
Check Light (MalfunctionIndicator) . . . . . . . . . . . . . . . . . . . . . . . . 131
Compartment Overview . . . . . . . . . . 240
Coolant Temperature Gauge . . . . . 128
Coolant Temperature
Warning Light . . . . . . . . . . . . . . . . . . . 136
Cooling System . . . . . . . . . . . . . . . . . . . 250
Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Drive Belt Routing . . . . . . . . . . . . . . . . 338
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
Oil Life System . . . . . . . . . . . . . . . . . . . . 246 Engine (cont'd)
Oil Pressure Light . . . . . . . . . . . . . . . . . 137
Overheated Protection
Operating Mode . . . . . . . . . . . . . . . . . 254
Overheating . . . . . . . . . . . . . . . . . . . . . . . 253
Power Messages . . . . . . . . . . . . . . . . . . 146
Running While Parked . . . . . . . . . . . 191
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
Engine Oil
Temperature Gauge . . . . . . . . . . . . . . . 127
Entry Lighting . . . . . . . . . . . . . . . . . . . . . . 160
Equipment, Towing . . . . . . . . . . . . . . . . . 234
Event Data Recorders . . . . . . . . . . . . . . 350
Exit Lighting . . . . . . . . . . . . . . . . . . . . . . . . 161
Extended Parking . . . . . . . . . . . . . . . . . . . 189
Extender, Seat Belt . . . . . . . . . . . . . . . . . . 74
Exterior Lamp Controls . . . . . . . . . . . . 155
Exterior Lamps Off Reminder . . . . . . 156
Exterior Lighting Battery Saver . . . . 161
F
Features Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Filter,
Engine Air Cleaner . . . . . . . . . . . . . . . . 248
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . 157
Flashers, Hazard Warning . . . . . . . . . . 158
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 291 Flat Tire (cont'd)
Changing . . . . . . . . . . . . . . . . . . . . . . . . . . 300
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . . . . 319
Fluid Automatic Transmission . . . . . . . . . 247
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257
Power Steering . . . . . . . . . . . . . . . . . . . . 255
Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256
Folding Mirrors . . . . . . . . . . . . . . . . . . . . . . 44
Forward Automatic Braking . . . . . . . . 219
Forward Collision Alert (FCA)
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 349
Front Seats Heated and Ventilated . . . . . . . . . . . . . 63
Fuel Additives . . . . . . . . . . . . . . . . . . . . . . . . . . 227
Economy Driving . . . . . . . . . . . . . . . . . . . 25
Filling a Portable Fuel
Container . . . . . . . . . . . . . . . . . . . . . . . . 229
Filling the Tank . . . . . . . . . . . . . . . . . . . 227
Foreign Countries . . . . . . . . . . . . . . . . . 227
Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Low Fuel Warning Light . . . . . . . . . 138
Prohibited Fuels . . . . . . . . . . . . . . . . . . 227
Recommended . . . . . . . . . . . . . . . . . . . . 226
Top Tier . . . . . . . . . . . . . . . . . . . . . . . . . . . 226