2018 CADILLAC XTS coolant temperature

Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-11354412) -
2018 - crc - 11/16/17
VEHICLE CARE 249
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.
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 0338.
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.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.

Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-11354412) -
2018 - crc - 11/16/17
250 VEHICLE CARE
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 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 (LFX
with FWD)
The vehicle has electric power steering
and does not use power steering fluid.
Power Steering Fluid
(LF3 and LFX with AWD)

Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-11354412) -
2018 - crc - 11/16/17
262 VEHICLE CARE
FusesUsage
23 Variable effort steering module
24 Front power windows
25 Retained accessory power
26 ABS pump
27 Electric park brake
28 Rear window defogger
29 Passive entry/Passive start
30 Spare
31 Heated driver seat
32 Stop lamps —center
high mounted stop
lamp/Backup-reverse
lamps/Interior
33 Heated passenger seat
34 ABS valves
35 Amplifier
36 Tail park lamp —
driver side Fuses
Usage
37 Right high-beam headlamp
38 Left high-beam headlamp
39 Tail park lamp —
passenger side
40 Long range radar
41 Brake vacuum assist pump
42 Cooling fan high speed
43 –
44 –
45 Cooling fan low speed
46 Cooling fan control
47 Pre-catalytic converter O2 sensor
heater/Canister purge
solenoid
48 Low temperature radiator coolant pump
49 Right headlamp LED Fuses
Usage
50 Left headlamp LED
51 Horn
52 Display/Ignition
53 Air quality sensor/ Inside rearview
mirror/Rear vision
camera
54 HVAC/Reflective LED alert display
55 Driver and passenger door switches/Outside
rearview mirror
switch/Mirror
memory module
56 Windshield washer
57 –
58 –
59 –
60 Heated outside rearview mirror
61 –
62 Front seats massage module

Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-11354412) -
2018 - crc - 11/16/17
360 INDEX
Cluster, Instrument . . . . . . . . . . . . . . . . . 118
Collision Damage Repair . . . . . . . . . . . 341
Compact Spare Tire . . . . . . . . . . . . . . . . . 299
CompartmentsStorage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Compass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Compressor Kit, Tire Sealant . . . . . . . 288
Connections OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350
Control Traction and Electronic
Stability . . . . . . . . . . . . . . . . . . . . . . . . . . 193
Control of a Vehicle . . . . . . . . . . . . . . . . 171
Convenience Net . . . . . . . . . . . . . . . . . . . . 109
Convex Mirrors . . . . . . . . . . . . . . . . . . . . . . 44
Coolant Engine Temperature Gauge . . . . . . 124
Engine Temperature WarningLight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Cooling . . . . . . . . . . . . . . . . . . . . . . . . .160, 165
Cooling System . . . . . . . . . . . . . . . . . . . . . 245
Cornering Lamps . . . . . . . . . . . . . . . . . . . 156
Courtesy Lamps . . . . . . . . . . . . . . . . . . . . . 156
Courtesy Transportation Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340
Cover Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . 196 Cruise Control (cont'd)
Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Cruise Control, Adaptive . . . . . . . . . . . 198
Customer Assistance . . . . . . . . . . . . . . . 336 Offices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336
Text Telephone (TTY) Users . . . . . 336
Customer Information Service Publications OrderingInformation . . . . . . . . . . . . . . . . . . . . . . 343
Customer Satisfaction Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . 334
D
Damage Repair, Collision . . . . . . . . . . . 341
Danger, Warning, and Caution . . . . . . . . 3
Data CollectionInfotainment System . . . . . . . . . . . . . 346
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 346
Data Recorders, Event . . . . . . . . . . . . . . 345
Daytime Running Lamps (DRL) . . . 154
Defensive Driving . . . . . . . . . . . . . . . . . . . 171
Delayed Locking . . . . . . . . . . . . . . . . . . . . . 38
Diagnostics OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 352
Distracted Driving . . . . . . . . . . . . . . . . . . 170
Dome Lamps . . . . . . . . . . . . . . . . . . . . . . . . 156
Door Ajar Light . . . . . . . . . . . . . . . . . . . . . . . . . 136 Door (cont'd)
Delayed Locking . . . . . . . . . . . . . . . . . . . . 38
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Power Locks . . . . . . . . . . . . . . . . . . . . . . . . . 38
Rear Seat Pass-Through . . . . . . . . . . . . 68
Drive Belt Routing, Engine . . . . . . . . . 333
Drive Systems All-Wheel Drive . . . . . . . . . . . . . . 190, 254
Driver Assistance Systems . . . . . . . . . 206
Driver Information
Center (DIC) . . . . . . . . . . . . . . . . . . . . . . . 136
Driving Assistance Systems . . . . . . . . . . . . . . . 213
Characteristics andTowing Tips . . . . . . . . . . . . . . . . . . . . . 226
Defensive . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Drunk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
For Better Fuel Economy . . . . . . . . . . . 26
Hill and Mountain Roads . . . . . . . . 174
If the Vehicle is Stuck . . . . . . . . . . . . 176
Loss of Control . . . . . . . . . . . . . . . . . . . . 173
Off-Road Recovery . . . . . . . . . . . . . . . . 173
Vehicle Load Limits . . . . . . . . . . . . . . 176
Wet Roads . . . . . . . . . . . . . . . . . . . . . . . . . 173
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
Dual Automatic Climate Control System . . . . . . . . . . . . . . . . . . . . 160

Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-11354412) -
2018 - crc - 11/16/17
INDEX 361
E
Electric Parking Brake . . . . . . . . . . . . . . 191
Electric Parking Brake Light . . . . . . . 130
Electrical Equipment, Add-On . . . . . 230
Electrical SystemEngine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260
Fuses and Circuit Breakers . . . . . . . 260
Instrument Panel Fuse Block . . . . 263
Overload . . . . . . . . . . . . . . . . . . . . . . . . . . . 259
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265
Emergency OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 348
Engine Air Cleaner/Filter . . . . . . . . . . . . . . . . . 243
Check Light (MalfunctionIndicator) . . . . . . . . . . . . . . . . . . . . . . . . 128
Compartment Overview . . . . . . . . . . 236
Coolant Temperature Gauge . . . . . 124
Coolant Temperature
Warning Light . . . . . . . . . . . . . . . . . . . 133
Cooling System . . . . . . . . . . . . . . . . . . . 245
Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
Drive Belt Routing . . . . . . . . . . . . . . . . 333
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
Oil Life System . . . . . . . . . . . . . . . . . . . . 242 Engine (cont'd)
Oil Pressure Light . . . . . . . . . . . . . . . . . 134
Overheated Protection
Operating Mode . . . . . . . . . . . . . . . . . 250
Overheating . . . . . . . . . . . . . . . . . . . . . . . 249
Power Messages . . . . . . . . . . . . . . . . . . 143
Running While Parked . . . . . . . . . . . 188
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
Engine Oil
Temperature Gauge . . . . . . . . . . . . . . . 124
Entry Lighting . . . . . . . . . . . . . . . . . . . . . . 157
Equipment, Towing . . . . . . . . . . . . . . . . . 229
Event Data Recorders . . . . . . . . . . . . . . 345
Exit Lighting . . . . . . . . . . . . . . . . . . . . . . . . 158
Extended Parking . . . . . . . . . . . . . . . . . . . 186
Extender, Seat Belt . . . . . . . . . . . . . . . . . . 73
Exterior Lamp Controls . . . . . . . . . . . . 152
Exterior Lamps Off Reminder . . . . . . 153
Exterior Lighting Battery Saver . . . . 158
F
Features Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Filter,
Engine Air Cleaner . . . . . . . . . . . . . . . . 243
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . 154
Flashers, Hazard Warning . . . . . . . . . . 155
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286 Flat Tire (cont'd)
Changing . . . . . . . . . . . . . . . . . . . . . . . . . . 295
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . . . . 314
Fluid Automatic Transmission . . . . . . . . . 243
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253
Power Steering . . . . . . . . . . . . . . . . . . . . 250
Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
Folding Mirrors . . . . . . . . . . . . . . . . . . . . . . 45
Forward Automatic Braking . . . . . . . . 215
Forward Collision Alert (FCA)
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344
Front Seats Heated and Ventilated . . . . . . . . . . . . . 62
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222 Additives . . . . . . . . . . . . . . . . . . . . . . . . . . 223
Economy Driving . . . . . . . . . . . . . . . . . . . 26
Filling a Portable Fuel
Container . . . . . . . . . . . . . . . . . . . . . . . . 225
Filling the Tank . . . . . . . . . . . . . . . . . . . 224
Foreign Countries . . . . . . . . . . . . . . . . . 223
Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Low Fuel Warning Light . . . . . . . . . 134
Requirements, California . . . . . . . . . 223
Full-Size Spare Tire . . . . . . . . . . . . . . . . . 300

Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-11354412) -
2018 - crc - 11/16/17
362 INDEX
FusesEngine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260
Fuses and Circuit Breakers . . . . . . . 260
Instrument Panel Fuse Block . . . . 263
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265
G
Garage Door Opener . . . . . . . . . . . . . . . . 148
Programming . . . . . . . . . . . . . . . . . . . . . . 148
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . . . 256
Gauges
Boost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Engine Coolant Temperature . . . . 124
Engine Oil Temperature . . . . . . . . . . 124
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Speedometer . . . . . . . . . . . . . . . . . . . . . . 122
Tachometer . . . . . . . . . . . . . . . . . . . . . . . 122
Trip Odometer . . . . . . . . . . . . . . . . . . . . 122
Warning Lights andIndicators . . . . . . . . . . . . . . . . . . . . . . . . 117
General Information Service and Maintenance . . . . . . . . 315
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226
Vehicle Care . . . . . . . . . . . . . . . . . . . . . . . 233
Glove Box . . . . . . . . . . . . . . . . . . . . . . . . . . . 107 GM Mobility Reimbursement
Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337
H
Hazard Warning Flashers . . . . . . . . . . 155
Head Restraints . . . . . . . . . . . . . . . . . . . . . . 53
Head-up Display . . . . . . . . . . . . . . . . . . . . 139
Headlamps
Aiming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258
Automatic . . . . . . . . . . . . . . . . . . . . . . . . . 154
Bulb Replacement . . . . . . . . . . . . . . . . 258
Daytime RunningLamps (DRL) . . . . . . . . . . . . . . . . . . . . 154
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . 154
High-Beam On Light . . . . . . . . . . . . . . 135
High/Low Beam Changer . . . . . . . . . 153
Lamps On Reminder . . . . . . . . . . . . . . 135
Heated Rear Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Steering Wheel . . . . . . . . . . . . . . . . . . . . 111
Heated and Ventilated Front
Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Heated Mirrors . . . . . . . . . . . . . . . . . . . . . . . 46
Heater Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
Heating . . . . . . . . . . . . . . . . . . . . . . . . .160, 165
High-Beam On Light . . . . . . . . . . . . . . . . 135
High-Speed Operation . . . . . . . . . . . . . . 276 Hill and Mountain Roads . . . . . . . . . . 174
Hill Start Assist (HSA) . . . . . . . . . . . . . 193
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
How to Wear Seat Belts Properly . . . 69
HVAC . . . . . . . . . . . . . . . . . . . . . . . . . . .160, 165
I
Ignition Positions . . . . . . . . . . . . . . . . . . . 181
Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Indicator
Vehicle Ahead . . . . . . . . . . . . . . . . . . . . . 132
Infants and Young Children, Restraints . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Infotainment . . . . . . . . . . . . . . . . . . . . . . . . 159
Infotainment System . . . . . . . . . . . . . . . 346
Instrument Cluster . . . . . . . . . . . . . . . . . 118
Instrument Panel Storage Area . . . . . . . . . . . . . . . . . . . . . . 106
Instrument Panel Overview . . . . . . . . . . . 6
Interior Rearview Mirrors . . . . . . . . . . . 46
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
J
Jump Starting - North America . . . . 301

Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-11354412) -
2018 - crc - 11/16/17
INDEX 363
K
Keyless EntryRemote (RKE) System . . . . . . . . . . . . . . 28
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
L
Labeling, Tire Sidewall . . . . . . . . . . . . . 269
Lamps Cornering . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Courtesy . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Daytime Running (DRL) . . . . . . . . . . 154
Dome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Exterior Controls . . . . . . . . . . . . . . . . . . 152
Exterior Lamps Off Reminder . . . . 153
Exterior Lighting BatterySaver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
License Plate . . . . . . . . . . . . . . . . . . . . . . 259
Malfunction Indicator (Check Engine) . . . . . . . . . . . . . . . . . . . . . . . . . . 128
On Reminder . . . . . . . . . . . . . . . . . . . . . . 135
Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
Lane Change Alert (LCA) . . . . . . . . . . . 217
Lane Departure Warning (LDW) . . . . . . . . . . . . . . . . . . . 219
Lane Departure Warning Light . . . . 131
Lane Keep Assist (LKA) . . . . . . . . . . . . 220
Lane Keep Assist Light . . . . . . . . . . . . . 131
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . 70 LATCH System
Replacing Parts after a Crash . . . . 100
LATCH, Lower Anchors and Tethers for Children . . . . . . . . . . . . . . . 94
LED Lighting . . . . . . . . . . . . . . . . . . . . . . . . 258
Level Control Automatic . . . . . . . . . . . . . . . . . . . . . . . . . 195
Lighter, Cigarette . . . . . . . . . . . . . . . . . . . 116
Lighting Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Illumination Control . . . . . . . . . . . . . . 156
LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258
Lights Airbag Readiness . . . . . . . . . . . . . . . . . 126
Antilock Brake System (ABS)Warning . . . . . . . . . . . . . . . . . . . . . . . . . 131
Brake System Warning . . . . . . . . . . . 129
Charging System . . . . . . . . . . . . . . . . . . 127
Check Engine (Malfunction Indicator) . . . . . . . . . . . . . . . . . . . . . . . . 128
Cruise Control . . . . . . . . . . . . . . . . . . . . . 135
Door Ajar . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Electric Parking Brake . . . . . . . . . . . . 130
Engine Coolant Temperature Warning . . . . . . . . . . . . . . . . . . . . . . . . . 133
Engine Oil Pressure . . . . . . . . . . . . . . . 134
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . 154 Lights (cont'd)
High-Beam On . . . . . . . . . . . . . . . . . . . . 135
High/Low Beam Changer . . . . . . . . . 153
Lane Departure Warning . . . . . . . . . 131
Lane Keep Assist . . . . . . . . . . . . . . . . . . 131
Low Fuel Warning . . . . . . . . . . . . . . . . 134
Seat Belt Reminders . . . . . . . . . . . . . . 125
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Service Electric Parking Brake . . . 130
StabiliTrak OFF . . . . . . . . . . . . . . . . . . . 132
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . 133
Traction Control System
(TCS)/StabiliTrak . . . . . . . . . . . . . . . . 133
Traction Off . . . . . . . . . . . . . . . . . . . . . . . 132
Limited-Slip Rear Axle . . . . . . . . . . . . . 195
Locks Automatic Door . . . . . . . . . . . . . . . . . . . . . 39
Delayed Locking . . . . . . . . . . . . . . . . . . . . 38
Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Lockout Protection . . . . . . . . . . . . . . . . . 39
Power Door . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Loss of Control . . . . . . . . . . . . . . . . . . . . . . 173
Low Fuel Warning Light . . . . . . . . . . . 134
Low-Profile Tires . . . . . . . . . . . . . . . . . . . . 268
Lower Anchors and Tethers for
Children (LATCH System) . . . . . . . . . 94
Lumbar Adjustment . . . . . . . . . . . . . . . . . 57