2018 CADILLAC XT5 check engine light

Cadillac XT5 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349110) - 2018 - CRC - 9/28/17
VEHICLE CARE 261
1. Turn the pressure cap slowlycounterclockwise. 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 withthe 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
Step 1-–6.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 several indicators to
warn of the engine overheating.
There is an engine coolant
temperature gauge and an engine
coolant temperature warning light on
the instrument cluster. See Engine
Coolant Temperature Gauge 0129 and
Engine Coolant Temperature Warning
Light 0138. The vehicle may also
display a message on the Driver
Information Center (DIC).
If the decision is made not to lift the
hood when this warning appears, get
service help right away. See Roadside
Service 0347.
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 fan is running.

Cadillac XT5 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349110) - 2018 - CRC - 9/28/17
262 VEHICLE CARE
If the engine is overheating, the fan
should be running. If it is 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(Continued)
Warning (Continued)
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.
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 engine coolant temperature
gauge is no longer in the overheated
area or the engine coolant
temperature warning light no longer
displays, the vehicle can be driven.
Continue to drive the vehicle slowly
for about 10 minutes. Keep a safe
distance from the vehicle in front.
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.

Cadillac XT5 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349110) - 2018 - CRC - 9/28/17
264 VEHICLE CARE
Caution
Continuing to drive with worn-out
brake pads could result in costly
brake repair.
Some driving conditions or climates
can cause a brake squeal when the
brakes are first applied or lightly
applied. This does not mean
something is wrong with the brakes.
Properly torqued wheel nuts are
necessary to help prevent brake
pulsation. When tires are rotated,
inspect brake pads for wear and
evenly tighten wheel nuts in the
proper sequence to torque
specifications. See Capacities and
Specifications 0341.
Brake pads should be replaced as
complete sets.
Brake Pedal Travel
See your dealer if the brake pedal does
not return to normal height, or if
there is a rapid increase in pedal
travel. This could be a sign that brake
service may be required.
Replacing Brake System Parts
Always replace brake system parts
with new, approved replacement parts.
If this is not done, the brakes may not
work properly. The braking
performance expected can change in
many other ways if the wrong
replacement brake parts are installed
or if parts are improperly installed.
Brake Fluid
The brake master cylinder reservoir is
filled with GM approved DOT 3 brake
fluid as indicated on the reservoir cap.
See Engine Compartment Overview
0 253 for the location of the reservoir.
Checking Brake Fluid
With the vehicle in P (Park) on a level
surface, the brake fluid level should be
between the minimum and maximum
marks on the brake fluid reservoir. There are only two reasons why the
brake fluid level in the reservoir may
go down:
.
Normal brake lining wear. When
new linings are installed, the fluid
level goes back up.
. A fluid leak in the brake hydraulic
system. Have the brake hydraulic
system fixed. With a leak, the
brakes will not work well.
Always clean the brake fluid reservoir
cap and the area around the cap
before removing it.
Do not top off the brake fluid. Adding
fluid does not correct a leak. If fluid is
added when the linings are worn,
there will be too much fluid when
new brake linings are installed. Add or
remove fluid, as necessary, only when
work is done on the brake hydraulic
system.

Cadillac XT5 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349110) - 2018 - CRC - 9/28/17
VEHICLE CARE 315
1. Discharged Remote BatteryPositive Terminal
2. Discharged Remote Battery Negative Ground Terminal
3. Good Battery Negative Terminal
4. Good Battery Positive Terminal
The jump start remote positive
terminal (1) and the remote negative
ground terminal (2) for the discharged
battery are on the driver side of the
vehicle. The jump start negative terminal (3)
and positive terminal (4) are on the
battery of the vehicle providing the
jump start.
The positive jump start connection for
the discharged battery is under a
cover. Remove the cover to expose the
terminal.
1. Check the other vehicle. It must have a 12-volt battery with a
negative ground system.
Caution
If the other vehicle does not have a
12-volt system with a negative
ground, both vehicles can be
damaged. Only use a vehicle that
has a 12-volt system with a
negative ground for jump starting.
2. Position the two vehicles so that they are not touching.
3. Set the parking brake firmly and put the transmission in P (Park).
See Shifting Into Park 0193.
Caution
If any accessories are left on or
plugged in during the jump starting
procedure, they could be damaged.
The repairs would not be covered
by the vehicle warranty. Whenever
possible, turn off or unplug all
accessories on either vehicle when
jump starting.
4. Turn the ignition off. Turn off all lights and accessories in both
vehicles, except the hazard
warning flashers if needed.
{Warning
An electric fan can start up even
when the engine is not running and
can injure you. Keep hands,
clothing, and tools away from any
underhood electric fan.

Cadillac XT5 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349110) - 2018 - CRC - 9/28/17
SERVICE AND MAINTENANCE 335
Battery
The 12-volt battery supplies power to
start the engine and operate any
additional electrical accessories.
.To avoid break-down or failure to
start the vehicle, maintain a
battery with full cranking power.
. Trained dealer technicians have
the diagnostic equipment to test
the battery and ensure that the
connections and cables are
corrosion-free.
Belts
. Belts may need replacing if they
squeak or show signs of cracking
or splitting.
. Trained dealer technicians have
access to tools and equipment to
inspect the belts and recommend
adjustment or replacement when
necessary. Brakes
Brakes stop the vehicle and are crucial
to safe driving.
.
Signs of brake wear may include
chirping, grinding, or squealing
noises, or difficulty stopping.
. Trained dealer technicians have
access to tools and equipment to
inspect the brakes and recommend
quality parts engineered for the
vehicle.
Fluids
Proper fluid levels and approved fluids
protect the vehicle’s systems and
components. See Recommended Fluids
and Lubricants 0337 for GM approved
fluids.
. Engine oil and windshield washer
fluid levels should be checked at
every fuel fill.
. Instrument cluster lights may
come on to indicate that fluids
may be low and need to be filled. Hoses
Hoses transport fluids and should be
regularly inspected to ensure that
there are no cracks or leaks. With a
multi-point inspection, your dealer
can inspect the hoses and advise if
replacement is needed.
Lamps
Properly working headlamps,
taillamps, and brake lamps are
important to see and be seen on
the road.
.
Signs that the headlamps need
attention include dimming, failure
to light, cracking, or damage. The
brake lamps need to be checked
periodically to ensure that they
light when braking.
. With a multi-point inspection,
your dealer can check the lamps
and note any concerns.

Cadillac XT5 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349110) - 2018 - CRC - 9/28/17
368 INDEX
IndexA
Accessories and Modifications . . . . . 251
Accessory Power . . . . . . . . . . . . . . . . . . . . 193
Adaptive Cruise Control . . . . . . . . . . . . 210
Add-On Electrical Equipment . . . . . . 248
Additional InformationOnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 363
Additional Maintenance and Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 334
Adjustments
Lumbar, Front Seats . . . . . . . . . . . . . . . . 61
Air Cleaner/Filter, Engine . . . . . . . . . . 257
Air Conditioning . . . . . . . . . . . . . . .168, 173
Air Filter, Passenger Compartment . . . . . . . . . . . . . . . . . . . . . 176
Air Vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
Airbag System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
How Does an Airbag Restrain? . . . . . 82
Passenger Sensing System . . . . . . . . . 83
What Makes an Airbag Inflate? . . . . 81
What Will You See after anAirbag Inflates? . . . . . . . . . . . . . . . . . . . 82
When Should an Airbag
Inflate? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Where Are the Airbags? . . . . . . . . . . . . 79 Airbags
Adding Equipment to the
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Passenger Status Indicator . . . . . . . 132
Readiness Light . . . . . . . . . . . . . . . . . . . 131
Servicing Airbag-Equipped Vehicles . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
System Check . . . . . . . . . . . . . . . . . . . . . . . 78
Alarm Vehicle Security . . . . . . . . . . . . . . . . . . . . . 46
Alert
Lane Change . . . . . . . . . . . . . . . . . . . . . . 232
Side Blind Zone (SBZA) . . . . . . . . . . 232
All-Season Tires . . . . . . . . . . . . . . . . . . . . . 280
All-Wheel Drive . . . . . . . . . . . . . . . .201, 266
Antilock Brake System (ABS) . . . . . . 202 Warning Light . . . . . . . . . . . . . . . . . . . . 136
Appearance Care Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 319
Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323
Armrest
Rear Seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Armrest Storage . . . . . . . . . . . . . . . . . . . . . 108
Ashtrays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Assistance Systems for Driving . . . . 226
Assistance Systems for Parking and Backing . . . . . . . . . . . . . . . . . . . . . . . 220

Cadillac XT5 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349110) - 2018 - CRC - 9/28/17
INDEX 369
AutomaticDimming Mirrors . . . . . . . . . . . . . . . . . . . 50
Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Forward Braking . . . . . . . . . . . . . . . . . . 229
Headlamp System . . . . . . . . . . . . . . . . 162
Transmission . . . . . . . . . . . . . . . . . . . . . . 196
Transmission Fluid . . . . . . . . . . . . . . . 257
Automatic Transmission Manual Mode . . . . . . . . . . . . . . . . . . . . . 200
B
BatteryExterior Lighting BatterySaver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
Power Protection . . . . . . . . . . . . . . . . . . 166
Battery - North America . . . . . .265, 314
Blade Replacement, Wiper . . . . . . . . . 267
Brake Parking, Electric . . . . . . . . . . . . . . . . . . 203
System Warning Light . . . . . . . . . . . . 135
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263
Antilock . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264
Braking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179 Automatic Forward . . . . . . . . . . . . . . . 229
Braking System Front Pedestrian (FPB) . . . . . . . . . . . 230 Break-In, New Vehicle . . . . . . . . . . . . . . 188
Bulb Replacement
Back-up Lamps . . . . . . . . . . . . . . . . . . . 271
Halogen Bulbs . . . . . . . . . . . . . . . . . . . . 270
Headlamp Aiming . . . . . . . . . . . . . . . . 269
Headlamps . . . . . . . . . . . . . . . . . . . . . . . . 270
Headlamps and Front TurnSignal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270
Buying New Tires . . . . . . . . . . . . . . . . . . . 295
C
Cadillac Premium Care Maintenance . . . . . . . . . . . . . . . . . . . . . . 330
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . 117
California Fuel Requirements . . . . . . . . . . . . . . . . 237
Perchlorate MaterialsRequirements . . . . . . . . . . . . . . . . . . . 251
California Proposition 65 Warning . . . . . . . . . . . . .250, 265, 314, Back Cover
Canadian Vehicle Owners . . . . . . . . . . . . . 2
Capacities and Specifications . . . . . . 341
Carbon Monoxide Engine Exhaust . . . . . . . . . . . . . . . . . . . 195
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Winter Driving . . . . . . . . . . . . . . . . . . . . 182 Cargo
Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Management System . . . . . . . . . . . . . 110
Tie-Downs . . . . . . . . . . . . . . . . . . . . . . . . . 110
Caution, Danger, and Warning . . . . . . . . 3
Center Console Storage . . . . . . . . . . . . . 108
Chains, Tire . . . . . . . . . . . . . . . . . . . . . . . . . 299
Charging Wireless . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Charging System Light . . . . . . . . . . . . . 133
Check Engine Light (MalfunctionIndicator) . . . . . . . . . . . . . . . . . . . . . . . . 133
Child Restraints Infants and Young Children . . . . . . . . 91
Lower Anchors and Tethers forChildren . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Older Children . . . . . . . . . . . . . . . . . . . . . . 89
Securing . . . . . . . . . . . . . . . . . . . . . . 102, 104
Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Cigarette Lighter . . . . . . . . . . . . . . . . . . . . 121
Circuit Breakers . . . . . . . . . . . . . . . . . . . . . 272
Cleaning
Exterior Care . . . . . . . . . . . . . . . . . . . . . . 319
Interior Care . . . . . . . . . . . . . . . . . . . . . . 323
Climate Control Systems Dual Automatic . . . . . . . . . . . . . . . . . . . 168
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173

Cadillac XT5 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349110) - 2018 - CRC - 9/28/17
INDEX 371
E
Electric Parking Brake . . . . . . . . . . . . . . 203
Electric Parking Brake Light . . . . . . . 135
Electrical Equipment, Add-On . . . . . 248
Electrical SystemEngine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Fuses and Circuit Breakers . . . . . . . 272
Instrument Panel Fuse Block . . . . 275
Overload . . . . . . . . . . . . . . . . . . . . . . . . . . . 271
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277
Emergency OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 358
Engine Air Cleaner/Filter . . . . . . . . . . . . . . . . . 257
Check Light (MalfunctionIndicator) . . . . . . . . . . . . . . . . . . . . . . . . 133
Compartment Overview . . . . . . . . . . 253
Coolant Temperature Gauge . . . . . 129
Coolant Temperature
Warning Light . . . . . . . . . . . . . . . . . . . 138
Cooling System . . . . . . . . . . . . . . . . . . . 258
Drive Belt Routing . . . . . . . . . . . . . . . . 342
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
Oil Life System . . . . . . . . . . . . . . . . . . . . 256
Oil Pressure Gauge . . . . . . . . . . . . . . . . 128 Engine (cont'd)
Oil Pressure Light . . . . . . . . . . . . . . . . . 139
Overheating . . . . . . . . . . . . . . . . . . . . . . . 261
Power Messages . . . . . . . . . . . . . . . . . . 147
Running While Parked . . . . . . . . . . . 196
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
Entry Lighting . . . . . . . . . . . . . . . . . . . . . . 165
Equipment, Towing . . . . . . . . . . . . . . . . . 245
Event Data Recorders . . . . . . . . . . . . . . 355
Exit Lighting . . . . . . . . . . . . . . . . . . . . . . . . 165
Extended Parking . . . . . . . . . . . . . . . . . . . 195
Extender, Seat Belt . . . . . . . . . . . . . . . . . . 76
Exterior Lamp Controls . . . . . . . . . . . . 160
Exterior Lamps Off Reminder . . . . . . 162
Exterior Lighting Battery Saver . . . . 166
F
Features Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Filter, Engine Air Cleaner . . . . . . . . . . . . . . . . 257
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . 162
Flashers, Hazard Warning . . . . . . . . . . 163
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300 Changing . . . . . . . . . . . . . . . . . . . . . . . . . . 308
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . . . . 326
Fluid Automatic Transmission . . . . . . . . . 257 Fluid (cont'd)
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264
Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263
Folding Mirrors . . . . . . . . . . . . . . . . . . . . . . 49
Forward Automatic Braking . . . . . . . . 229
Forward Collision Alert (FCA)
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 353
Front Pedestrian Braking (FPB) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230
Front Seats Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Heated and Ventilated . . . . . . . . . . . . . 64
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236 Additives . . . . . . . . . . . . . . . . . . . . . . . . . . 237
Economy Driving . . . . . . . . . . . . . . . . . . . 25
Filling a Portable FuelContainer . . . . . . . . . . . . . . . . . . . . . . . . 239
Filling the Tank . . . . . . . . . . . . . . . . . . . 238
Foreign Countries . . . . . . . . . . . . . . . . . 237
Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Low Fuel Warning Light . . . . . . . . . 140
Requirements, California . . . . . . . . . 237
Fuses Engine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Fuses and Circuit Breakers . . . . . . . 272