2018 CADILLAC ATS transmission

Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-12032610) -
2019 - crc - 8/22/18
232 DRIVING AND OPERATING
with the automatic transmission in
P (Park) for a few minutes before
turning the engine off. If the overheat
warning comes on, seeEngine
Overheating 0253.
Parking on Hills
{Warning
Parking the vehicle on a hill with
the trailer attached can be
dangerous. If something goes
wrong, the rig could start to move.
People can be injured, and both the
vehicle and the trailer can be
damaged. When possible, always
park the rig on a flat surface.
If parking the rig on a hill: 1. Press the brake pedal, but do not shift into P (Park) yet. Turn the
wheels into the curb if facing
downhill or into traffic if facing
uphill.
2. Have someone place chocks under the trailer wheels. 3. When the wheel chocks are in
place, release the regular brakes
until the chocks absorb the load.
4. Reapply the brake pedal. Then apply the parking brake and shift
into P (Park).
5. Release the brake pedal.
Leaving After Parking on a Hill
1. Apply and hold the brake pedal.
2. Start the engine.
3. Shift into a gear.
4. Release the parking brake.
5. Let up on the brake pedal.
6. Drive slowly until the trailer is clear of the chocks.
7. Stop and have someone pick up and store the chocks.
Maintenance when Trailer
Towing
The vehicle needs service more often
when pulling a trailer. See
Maintenance Schedule 0322. Things
that are especially important in trailer
operation are automatic transmission fluid, engine oil, axle lubricant, belts,
cooling system, and brake system. It is
a good idea to inspect these before
and during the trip.
Check periodically to see that all hitch
nuts and bolts are tight.
Trailer Towing
{Warning
The driver can lose control when
pulling a trailer if the correct
equipment is not used or the
vehicle is not driven properly. For
example, if the trailer is too heavy
or the trailer brakes are inadequate
for the load, the vehicle may not
stop as expected. The driver and
passengers could be seriously
injured. The vehicle may also be
damaged; the resulting repairs
would not be covered by the vehicle
warranty. Pull a trailer only if all the
steps in this section have been
followed. Ask your dealer for advice
and information about towing a
trailer with the vehicle.

Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-12032610) -
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236 VEHICLE CARE
Vehicle Care
General Information
General Information . . . . . . . . . . . . . 237
California Proposition65 Warning . . . . . . . . . . . . . . . . . . . . . 237
California Perchlorate Materials Requirements . . . . . . . . . . . . . . . . . . . 238
Accessories and Modifications . . . . . . . . . . . . . . . . . . . 238
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . . . . . . 238
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . . . . . . . 240
Engine Cover . . . . . . . . . . . . . . . . . . . . . . 243
Engine Oil . . . . . . . . . . . . . . . . . . . . . . . . . 244
Engine Oil Life System . . . . . . . . . . . 246
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247
Engine Air Cleaner/Filter . . . . . . . . . 248
Cooling System . . . . . . . . . . . . . . . . . . . 250
Engine Overheating . . . . . . . . . . . . . . 253
Overheated Engine Protection Operating Mode . . . . . . . . . . . . . . . . . 254
Power Steering Fluid (LF3 and LFX with AWD) . . . . . . . . . . . . . . . . . 255 Power Steering Fluid (LFX
with FWD) . . . . . . . . . . . . . . . . . . . . . . 255
Washer Fluid . . . . . . . . . . . . . . . . . . . . . 256
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256
Brake Fluid . . . . . . . . . . . . . . . . . . . . . . . 257
Battery - North America . . . . . . . . . 258
All-Wheel Drive . . . . . . . . . . . . . . . . . . 259
Starter Switch Check . . . . . . . . . . . . . 259
Automatic Transmission Shift Lock Control Function
Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259
Park Brake and P (Park) Mechanism Check . . . . . . . . . . . . . . 260
Wiper Blade Replacement . . . . . . . 260
Windshield Replacement . . . . . . . . 261
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . 261
Headlamp Aiming
Headlamp Aiming . . . . . . . . . . . . . . . . 262
Bulb Replacement
Bulb Replacement . . . . . . . . . . . . . . . . 263
LED Lighting . . . . . . . . . . . . . . . . . . . . . 263
Back-Up Lamps . . . . . . . . . . . . . . . . . . . 263
License Plate Lamp . . . . . . . . . . . . . . 264
Electrical System
Electrical System Overload . . . . . . 264
Fuses and Circuit Breakers . . . . . . 265
Engine Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265 Instrument Panel Fuse Block . . . . 268
Rear Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
All-Season Tires . . . . . . . . . . . . . . . . . . 273
Winter Tires . . . . . . . . . . . . . . . . . . . . . . 273
Low-Profile Tires . . . . . . . . . . . . . . . . . 273
Summer Tires . . . . . . . . . . . . . . . . . . . . 273
Tire Sidewall Labeling . . . . . . . . . . . 274
Tire Designations . . . . . . . . . . . . . . . . . 276
Tire Terminology andDefinitions . . . . . . . . . . . . . . . . . . . . . . 277
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . 279
Tire Pressure for High-Speed Operation . . . . . . . . . . . . . . . . . . . . . . . . 281
Tire Pressure Monitor System . . . 281
Tire Pressure Monitor Operation . . . . . . . . . . . . . . . . . . . . . . . . 282
Tire Inspection . . . . . . . . . . . . . . . . . . . 285
Tire Rotation . . . . . . . . . . . . . . . . . . . . . 285
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286
Buying New Tires . . . . . . . . . . . . . . . . 287
Different Size Tires and Wheels . . . . . . . . . . . . . . . . . . . . . . . . . . 288
Uniform Tire Quality Grading . . . 289
Wheel Alignment and Tire Balance . . . . . . . . . . . . . . . . . . . . . . . . . . 290
Wheel Replacement . . . . . . . . . . . . . . 290

Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-12032610) -
2019 - crc - 8/22/18
VEHICLE CARE 247
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. Change the
oil as soon as possible within the next
1 000 km (600 mi). It is possible that,
if driving under the best conditions,
the oil life system might indicate that
an oil change is not necessary for up
to a year. The engine oil and filter
must be changed at least once a year
and at this time the system must be
reset. Your dealer has trained service
people who will perform this work and
reset the system. It is also important
to check the oil regularly over the
course of an oil drain interval and
keep it at the proper level.
If the system is ever reset accidentally,
the oil must be changed at 5 000 km
(3,000 mi) since the last oil change.
Remember to reset the oil life system
whenever the oil is changed.How to Reset the Engine Oil Life
System
Reset the system whenever the engine
oil is changed so that the system can
calculate the next engine oil change.
To reset the system:1. Using the DIC buttons, display REMAINING OIL LIFE on the
DIC. See Driver Information Center
(DIC) 0139.
2. Press and hold SEL to clear the CHANGE ENGINE OIL SOON
message and reset the oil life
at 100%.
Be careful not to reset the oil life
display accidentally at any time
other than after the oil is
changed. It cannot be reset
accurately until the next oil
change.
The oil life system can also be reset as
follows:
1. Display REMAINING OIL LIFE on the DIC. See Driver Information
Center (DIC) 0139. 2. Fully press and release the
accelerator pedal three times
within five seconds.
If the CHANGE ENGINE OIL
SOON message is not on, the
system is reset.
The system is reset when the
CHANGE ENGINE OIL SOON message
is off.
If the CHANGE ENGINE OIL SOON
message comes back on when the
vehicle is started, the engine oil life
system has not been reset. Repeat the
procedure.
Automatic Transmission
Fluid
A transmission fluid leak is the only
reason for fluid loss. If a leak occurs,
take the vehicle to your dealer and
have it repaired as soon as possible.

Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-12032610) -
2019 - crc - 8/22/18
248 VEHICLE CARE
Caution
Use of the incorrect automatic
transmission fluid may damage the
vehicle, and the damage may not be
covered by the vehicle warranty.
Always use the correct automatic
transmission fluid. See
Recommended Fluids and Lubricants
0332.
See your dealer to have the fluid and
filter changed at the intervals listed in
the Maintenance Schedule 0322.
Engine Air Cleaner/Filter
The engine air cleaner/filter is in the
engine compartment on the passenger
side of the vehicle. See Engine
Compartment Overview 0240.
When to Inspect the Engine Air
Cleaner/Filter
For intervals on changing and
inspecting the engine air cleaner/filter,
see Maintenance Schedule 0322.
How to Inspect the Engine Air
Cleaner/Filter
Do not start the engine or have the
engine running with the engine air
cleaner/filter housing open. Before
removing the engine air cleaner/filter,
make sure that the engine air cleaner/
filter housing and nearby components
are free of dirt and debris. Remove the
engine air cleaner/filter. Lightly tap
and shake the engine air cleaner/filter
(away from the vehicle), to release
dust and dirt. Inspect the engine air
cleaner/filter for damage, and replace
if damaged. Do not clean the engine
air cleaner/filter or components with
water or compressed air. To inspect or replace the engine air
cleaner/filter:
3.6L V6 Engine
1. Remove the seven screws on top of the engine air cleaner/filter
housing.
2. Lift the air cleaner/filter cover housing away from the engine.
3. Pull out the filter.
4. Inspect or replace the engine air cleaner/filter.
5. Reverse Steps 1–3 to reinstall the filter cover housing.

Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-12032610) -
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VEHICLE CARE 259
Warning (Continued)
America0306 for tips on working
around a battery without
getting hurt.
Infrequent Usage: Remove the black,
negative (−) cable from the battery to
keep the battery from running down.
Extended Storage: Remove the black,
negative (−) cable from the battery or
use a battery trickle charger.
All-Wheel Drive
Transfer Case
Under normal driving conditions,
transfer case fluid does not require
maintenance unless there is a fluid
leak or unusual noise. If required,
have the transfer case serviced by
your dealer.
Starter Switch Check
{Warning
When you are doing this inspection,
the vehicle could move suddenly.
If the vehicle moves, you or others
could be injured.
1. Before starting this check, be sure there is enough room
around the vehicle.
2. Firmly apply both the parking brake and the regular brake. See
Electric Parking Brake 0194.
Do not use the accelerator pedal,
and be ready to turn off the
engine immediately if it starts.
3. Try to start the engine in each gear. The vehicle should start
only in P (Park) or N (Neutral).
If the vehicle starts in any other
position, contact your dealer for
service.
Automatic Transmission
Shift Lock Control Function
Check
{Warning
When you are doing this inspection,
the vehicle could move suddenly.
If the vehicle moves, you or others
could be injured.
1. Before starting this check, be sure there is enough room
around the vehicle. It should be
parked on a level surface.
2. Firmly apply the parking brake. See Electric Parking Brake 0194.
Be ready to apply the regular
brake immediately if the vehicle
begins to move.
3. With the engine off, turn the ignition on, but do not start the
engine. Without applying the
regular brake, try to move the
shift lever out of P (Park) with

Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-12032610) -
2019 - crc - 8/22/18
260 VEHICLE CARE
normal effort. If the shift lever
moves out of P (Park), contact
your dealer for service.
Park Brake and P (Park)
Mechanism Check
{Warning
When you are doing this check, the
vehicle could begin to move. You or
others could be injured and
property could be damaged. Make
sure there is room in front of the
vehicle in case it begins to roll. Be
ready to apply the regular brake at
once should the vehicle begin
to move.
Park on a fairly steep hill, with the
vehicle facing downhill. Keeping your
foot on the regular brake, set the
parking brake.
. To check the parking brake's
holding ability: With the engine
running and the transmission in
N (Neutral), slowly remove foot pressure from the regular brake
pedal. Do this until the vehicle is
held by the parking brake only.
. To check the P (Park) mechanism's
holding ability: With the engine
running, shift to P (Park). Then
release the parking brake followed
by the regular brake.
Contact your dealer if service is
required.
Wiper Blade Replacement
Windshield wiper blades should be
inspected for wear or cracking.
It is a good idea to clean the wiper
blade assembly on a regular basis.
When worn, or when cleaning is
ineffective, replace the wiper blade.
For proper windshield wiper blade
length and type, see Maintenance
Replacement Parts 0333.
Caution
Allowing the wiper arm to touch
the windshield when no wiper blade
is installed could damage the
windshield. Any damage that occurs
would not be covered by the vehicle
warranty. Do not allow the wiper
arm to touch the windshield.
To replace the wiper blade: 1. Pull the wiper assembly away from the windshield.

Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-12032610) -
2019 - crc - 8/22/18
266 VEHICLE CARE
The vehicle may not be equipped with
all of the fuses, relays, and features
shown.Fuses Usage
1 Transmission control module
2 Engine control module
3 A/C clutch Fuses Usage
4 –
5 Engine control module/Ignition
6 Front wiper
7 –
8 Ignition coils –even
9 Ignition coils –odd Fuses Usage
10 Engine control module
11 Mass air flow sensor/ Post catalytic
converter O2 sensors
12 Starter
13 Transmission control module/Chassis
control module
ignition
14 Rear heated seat –
passenger side
15 Rear heated seat–driver side
16 –
17 Sunshade/Ventilated seats
18 Autonet
19 –
20 –
21 Rear power windows
22 Sunroof

Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-12032610) -
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VEHICLE CARE 277
diagonal or bias ply construction;
and the letter B means belted-bias
ply construction.
(5) Rim Diameter
:Diameter of
the wheel in inches.
(6) Service Description
:These
characters represent the load
index and speed rating of the tire.
The load index represents the load
carrying capacity a tire is certified
to carry. The speed rating is the
maximum speed a tire is certified
to carry a load.
Tire Terminology and
Definitions
Air Pressure:The amount of air
inside the tire pressing outward
on each square inch of the tire.
Air pressure is expressed in kPa
(kilopascal) or psi (pounds per
square inch).
Accessory Weight
:The combined
weight of optional accessories.
Some examples of optional accessories are automatic
transmission, power windows,
power seats, and air conditioning.
Aspect Ratio
:The relationship of
a tire's height to its width.
Belt
:A rubber coated layer of
cords between the plies and the
tread. Cords may be made from
steel or other reinforcing
materials.
Bead
:The tire bead contains steel
wires wrapped by steel cords that
hold the tire onto the rim.
Bias Ply Tire
:A pneumatic tire in
which the plies are laid at
alternate angles less than
90 degrees to the centerline of the
tread.
Cold Tire Pressure
:The amount
of air pressure in a tire, measured
in kPa (kilopascal) or psi (pounds
per square inch) before a tire has
built up heat from driving. See
Tire Pressure 0279. Curb Weight
:The weight of a
motor vehicle with standard and
optional equipment including the
maximum capacity of fuel, oil, and
coolant, but without passengers
and cargo.
DOT Markings
:A code molded
into the sidewall of a tire
signifying that the tire is in
compliance with the U.S.
Department of Transportation
(DOT) Motor Vehicle Safety
Standards. The DOT code includes
the Tire Identification Number
(TIN), an alphanumeric designator
which can also identify the tire
manufacturer, production plant,
brand, and date of production.
GVWR
:Gross Vehicle Weight
Rating. See Vehicle Load Limits
0 179.
GAWR FRT
:Gross Axle Weight
Rating for the front axle. See
Vehicle Load Limits 0179.