engine overheat CADILLAC CT5 2023 Owners Manual

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-16500419) -
2023 - CRC - 5/6/22
122 Instruments and Controls
English
This gauge measures the
temperature of the vehicle's
engine.
While driving under normal
operating conditions, if the red
LED is illuminated, the engine
is too hot. Pull off the road,
stop the vehicle, and turn off
the engine as soon as
possible.
Engine Coolant
Temperature Gauge
(Uplevel)
Sport Mode Shown, Track Mode Similar
This gauge shows the engine
coolant temperature.
If the gauge pointer moves
into the red zone, the engine is
too hot.
This reading indicates the
same thing as the warning
light. It means that the engine
coolant has overheated. If the
vehicle has been operating
under normal driving
conditions, pull off the road,
stop the vehicle, and turn off
the engine as soon as possible. See Engine
Overheating
0398 for more
information.
Seat Belt Reminders
Driver Seat Belt Reminder
Light
There is a driver seat belt
reminder light on the
instrument cluster.
When the vehicle is started,
this light flashes and a chime
may come on to remind the
driver to fasten their seat belt.
Then the light stays on solid
until the belt is buckled. This
cycle may continue several
times if the driver remains or
becomes unbuckled while the
vehicle is moving.

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-16500419) -
2023 - CRC - 5/6/22
132 Instruments and Controls
On some vehicles this light
comes on briefly while starting
the vehicle. If it does not, have
the vehicle serviced by the
dealer. If the system is
working normally the indicator
light goes off. For vehicles
with the reconfigurable
cluster, this light may not
come on when starting the
vehicle.
Caution
The engine coolant
temperature warning light
indicates that the vehicle
has overheated. Driving with
this light on can damage the
engine and it may not be
covered by the vehicle
warranty. See Engine
Overheating0398.
The engine coolant
temperature warning light
comes on when the engine has
overheated. If this happens pull over and
turn off the engine as soon as
possible. See Engine
Overheating
0398.
Driver Mode Control
Light
This light comes on when
Sport Mode is selected.
This light comes on when
Track Mode is selected. See
Driver Mode Control 0293.
This light comes on when
Snow/Ice Mode is selected.
This light comes on when V
Mode is selected. See Driver
Mode Control 0293.
This light comes on when My
Mode is selected. See Driver
Mode Control 0293.

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-16500419) -
2023 - CRC - 5/10/22
Driving and Operating 259
.Check all fluid levels and
brakes, tires, cooling system,
and transmission.
.Shift to a lower gear when
going down steep or long
hills.
{Warning
Using the brakes to slow the
vehicle on a long downhill
slope can cause brake
overheating, can reduce
brake performance, and
could result in a loss of
braking. Shift the
transmission to a lower gear
to let the engine assist the
brakes on a steep downhill
slope.
{Warning
Coasting downhill in
N (Neutral) or with the
ignition off is dangerous.
This can cause overheating
of the brakes and loss of(Continued)
Warning (Continued)
steering assist. Always have
the engine running and the
vehicle in gear.
.Drive at speeds that keep
the vehicle in its own lane.
Do not swing wide or cross
the center line.
.Be alert on top of hills;
something could be in your
lane (e.g., stalled car, crash).
.Pay attention to special road
signs (e.g., falling rocks area,
winding roads, long grades,
passing or no-passing zones)
and take appropriate action.
Winter Driving
Driving on Snow or Ice
Caution
To avoid damage to the
wheels and brake
components, always clear (Continued)
Caution (Continued)
snow and ice from inside the
wheels and underneath the
vehicle before driving.
Snow or ice between the tires
and the road creates less
traction or grip, so drive
carefully. Wet ice can occur at
about 0 °C (32 °F) when
freezing rain begins to fall.
Avoid driving on wet ice or in
freezing rain until roads can be
treated.
For Slippery Road Driving:
.Accelerate gently.
Accelerating too quickly
causes the wheels to spin
and makes the surface under
the tires slick.
.Turn on Traction Control.
See Traction Control/
Electronic Stability Control
0 291.
.The Antilock Brake System
(ABS) improves vehicle
stability during hard stops,
but the brakes should be

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-16500419) -
2023 - CRC - 5/10/22
Driving and Operating 261
To save fuel, run the engine
for short periods to warm the
vehicle and then shut the
engine off and partially close
the window. Moving about to
keep warm also helps.
If it takes time for help to
arrive, when running the
engine, push the accelerator
pedal slightly so the engine
runs faster than the idle
speed. This keeps the battery
charged to restart the vehicle
and to signal for help with the
headlamps. Do this as little as
possible, to save fuel.
If the Vehicle Is Stuck
Slowly and cautiously spin the
wheels to free the vehicle
when stuck in sand, mud, ice,
or snow.
The Traction Control System
(TCS) can often help to free a
stuck vehicle. See Traction
Control/Electronic Stability
Control0291. If TCS cannot free the vehicle,
turn TCS off and use the
rocking method. See
“Rocking
the Vehicle to Get it Out”
following.
{Warning
If the vehicle's tires spin at
high speed, they can
explode, and you or others
could be injured. The vehicle
can overheat, causing an
engine compartment fire or
other damage. Spin the
wheels as little as possible
and avoid going above
56 km/h (35 mph).
Rocking the Vehicle to Get
it Out
Turn the steering wheel left
and right to clear the area
around the front wheels. Turn
off any traction system. Shift
back and forth between
R (Reverse) and a low forward
gear, spinning the wheels as
little as possible. To prevent
transmission wear, wait until the wheels stop spinning
before shifting gears. Release
the accelerator pedal while
shifting, and press lightly on
the accelerator pedal when
the transmission is in gear.
Slowly spinning the wheels in
the forward and reverse
directions causes a rocking
motion that could free the
vehicle. If that does not get
the vehicle out after a few
tries, it might need to be
towed out. If the vehicle does
need to be towed out, see
Transporting a Disabled
Vehicle
0455.
Vehicle Load Limits
It is very important to know
how much weight the
vehicle can carry. This
weight is called the vehicle
capacity weight and
includes the weight of all
occupants, cargo, and all
nonfactory-installed
options. Two labels on the
vehicle may show how

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-16500419) -
2023 - CRC - 5/10/22
270 Driving and Operating
If the remote key is not in
the vehicle, if there is
interference, or if the
remote key battery is low,
a Driver Information
Center (DIC) message will
display. See Remote Key
Operation09.
Caution
Cranking the engine for long
periods of time, by pressing
ENGINE START/STOP
immediately after cranking
has ended, can overheat and
damage the cranking motor,
and drain the battery. Wait
at least 15 seconds between
each try, to let the cranking
motor cool down.
2. If the engine does not start after five to 10 seconds,
especially in very cold
weather (below −18 °C or
0 °F), it could be flooded
with too much gasoline.
Try pushing the
accelerator pedal all the
way to the floor and hold it there, then press ENGINE
START/STOP for up to a
maximum of 15 seconds.
Wait at least 15 seconds
between each try, to allow
the cranking motor to cool
down. When the engine
starts, let go of the button
and the accelerator. If the
vehicle starts briefly but
then stops again, do the
same thing. This clears the
extra gasoline from the
engine. Do not race the
engine immediately after
starting it. Operate the
engine and transmission
gently until the oil warms
up and lubricates all
moving parts.
Stopping the Engine
If the vehicle has an automatic
transmission, move the shift
lever to P (Park) and press and
hold ENGINE START/STOP on
the instrument panel, until the
engine shuts off. If the shift
lever is not in P (Park), the
engine shuts off and the
ignition goes to accessory
mode. The DIC displays SHIFT
TO PARK. Once the shift lever
is moved to P (Park), the
vehicle turns off.
If the vehicle has a manual
transmission, before getting
out of the vehicle, shift to
1 (First) or R (Reverse) and
apply the parking brake. Then
turn off the ignition off by
pressing ENGINE START/
STOP and release the clutch
pedal when the engine has
stopped.
If the remote key is not
detected inside the vehicle
when it is turned off the DIC
displays a message.
Stop/Start System
If equipped, the Stop/Start
system will shut off the engine
to help conserve fuel. It has
components designed for the
increased number of starts.

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-16500419) -
2023 - CRC - 5/10/22
272 Driving and Operating
The automatic engine Stop/
Start feature can be disabled
and enabled by pressing
h.
Auto Stop/Start is enabled
each time you start the
vehicle.
When the
hindicator is
illuminated, the system is
enabled.
Engine Heater
Vehicles with the engine
heater can use this option in
cold weather conditions at or
below −18 °C (0 °F) for easier
starting and better fuel
economy during engine
warm-up. Plug in the engine
heater at least four hours
before starting your vehicle.
An internal thermostat in the
plug-end of the cord may exist
which will prevent engine
heater operation at
temperatures above
−18 °C (0 °F).
To Use the Engine Heater
1. Turn off the engine.
Check the heater cord for
damage. If it is damaged,
do not use it. See your
dealer for a replacement.
Inspect the cord for
damage yearly.
2. Plug the heater cord intothe connector in the front
license plate bracket.
3. Plug it into a normal, grounded 110-volt AC
outlet.
{Warning
Improper use of the heater
cord or an extension cord
can damage the cord and
may result in overheating
and fire.
.Plug the cord into a
three-prong electrical
utility receptacle that is
protected by a ground
fault detection function.
An ungrounded outlet
could cause an electric
shock.
.Use a weatherproof,
heavy-duty, 15 amp-rated
extension cord if needed.
Failure to use the
recommended extension
cord in good operating
condition, or using a
damaged heater or
extension cord, could
make it overheat and
(Continued)

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-16500419) -
2023 - CRC - 5/10/22
274 Driving and Operating
Leaving the Vehicle with
the Engine Running
{Warning
It can be dangerous to leave
the vehicle with the engine
running. It could overheat
and catch fire.
It is dangerous to get out of
the vehicle if the vehicle is
not in P (Park) with the
parking brake set. The
vehicle can roll.
Do not leave the vehicle
when the engine is running.
If you have left the engine
running, the vehicle can
move suddenly. You or
others could be injured. To
be sure the vehicle will not
move, even when you are on
fairly level ground, always
set the parking brake and(Continued)
Warning (Continued)
shift to P (Park). See Shifting
Into Park0273. If you are
towing a trailer, see Driving
Characteristics and Towing
Tips 0365.
If you have to leave the vehicle
with the engine running, be
sure the vehicle is in P (Park)
and the parking brake is set
before you leave it.
If you are towing a trailer and
parking on a hill, see Driving
Characteristics and Towing
Tips 0365.
Shifting out of Park
This vehicle is equipped with
an electronic transmission.
The shift lock release button is
designed to prevent
inadvertent shifting out of
P (Park). To shift out of P (Park):
1. Ensure the engine is running.
2. Apply the brake pedal.
3. Press and hold the shift lock release button on the
shift lever.
4. Move the shift lever to the desired position. For
N (Neutral) hold the lever in
the N (Neutral) position
until the N indicator
illuminates red.
5. The P indicator will turn white and the gear
indicator will turn red when
the vehicle is no longer in
P (Park).
6. After releasing the shift lever, it will return to the
center position.
If equipped, the Buckle to
Drive feature may prevent
shifting from P (Park). See
Buckle To Drive 056.

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-16500419) -
2023 - CRC - 5/10/22
Driving and Operating 367
Towing with a Stability
Control System
When towing, the stability
control system might be
heard. The system reacts to
vehicle movement caused by
the trailer, which mainly occurs
during cornering. This is
normal when towing heavier
trailers.
Following Distance
Stay at least twice as far
behind the vehicle ahead as
you would when driving
without a trailer. This can help
to avoid heavy braking and
sudden turns.
Passing
More passing distance is
needed when towing a trailer.
The combination of the vehicle
and trailer will not accelerate
as quickly and is much longer
than the vehicle alone. It is
necessary to go much farther
beyond the passed vehiclebefore returning to the lane.
Pass on level roadways. Avoid
passing on hills if possible.
Backing Up
Hold the bottom of the
steering wheel with one hand.
To move the trailer to the left,
move that hand to the left. To
move the trailer to the right,
move that hand to the right.
Always back up slowly and,
if possible, have someone
guide you.
Making Turns
Caution
Turn more slowly and make
wider arcs when towing a
trailer to prevent damage to
your vehicle. Making very
sharp turns could cause the
trailer to contact the vehicle.
Make wider turns than normal
when towing, so trailer will not
go over soft shoulders, over
curbs, or strike road signs,
trees, or other objects. Always signal turns well in advance.
Do not steer or brake
suddenly.
Driving on Grades
Reduce speed and shift to a
lower gear before starting
down a long or steep downhill
grade. If the transmission is
not shifted down, the brakes
may overheat and result in
reduced braking efficiency.
Vehicles can tow in D (Drive).
Shift the transmission to a
lower gear if the transmission
shifts too often under heavy
loads and/or hilly conditions.
When towing at higher
altitudes, engine coolant will
boil at a lower temperature
than at lower altitudes. If the
engine is turned off
immediately after towing at
high altitude on steep uphill
grades, the vehicle could show
signs similar to engine
overheating. To avoid this, let
the engine run, preferably on
level ground, with the

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-16500419) -
2023 - CRC - 5/10/22
368 Driving and Operating
transmission in P (Park) for a
few minutes before turning
the engine off. If the overheat
warning comes on, see Engine
Overheating0398.
Parking on Hills
{Warning
To prevent serious injury or
death, always park your
vehicle and trailer on a level
surface when possible.
When parking your vehicle and
your trailer 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, gradually
release the brake pedal to
allow the chocks to absorb
the load of the trailer.
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.
.Start the engine.
.Shift into the
desired gear.
.Release the parking
brake.
2. Let up on the brake pedal.
3. Drive slowly until the trailer is clear of the chocks.
4. Stop and have someone pick up and store the
chocks.
Maintenance when Trailer
Towing
The vehicle needs service
more often when used to tow
trailers. See Maintenance
Schedule 0471. It is especially
important to check the
automatic transmission fluid,
engine oil, axle lubricant, belts,
cooling system, and brake
system before and during
each trip.
Check periodically that all nuts
and bolts on the trailer hitch
are tight.
Engine Cooling when
Trailer Towing
The cooling system may
temporarily overheat during
severe operating conditions.
See Engine Overheating
0 398.

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-16500419) -
2023 - CRC - 5/6/22
Vehicle Care 373
Vehicle Care
General Information
General Information . . . . . . 374
California PerchlorateMaterials
Requirements . . . . . . . . . . . . . 374
Accessories and Modifications . . . . . . . . . . . . . . 374
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . 375
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . 376
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . 378
Engine Oil . . . . . . . . . . . . . . . . . . . . 383
Engine Oil Life System . . . 386
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . . . . 388
Manual Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . . . . 388
Hydraulic Clutch . . . . . . . . . . . 388
Engine Air Filter Life System . . . . . . . . . . . . . . . . . . . . . . 389
Engine Air Cleaner/ Filter . . . . . . . . . . . . . . . . . . . . . . . . . 389
Cooling System . . . . . . . . . . . . 392
Engine Overheating . . . . . . 398
Washer Fluid . . . . . . . . . . . . . . . . 399 Brakes . . . . . . . . . . . . . . . . . . . . . . . . 400
Brake Pad Life System (If
Equipped) . . . . . . . . . . . . . . . . . . 403
Brake Fluid . . . . . . . . . . . . . . . . . . 404
Battery - North America . . . . . . . . . . . . . . . . . . . . . 405
All-Wheel Drive . . . . . . . . . . . . 406
Park Brake and P (Park) Mechanism Check . . . . . . . 406
Wiper Blade Replacement . . . . . . . . . . . . . . 407
Windshield Replacement . . . . . . . . . . . . . . 408
Gas Strut(s) . . . . . . . . . . . . . . . . . 408
Headlamp Aiming
Front Headlamp Aiming . . . . . . . . . . . . . . . . . . . . . . . 409
Bulb Replacement
LED Lighting . . . . . . . . . . . . . . . . 409
Electrical System
Electrical SystemOverload . . . . . . . . . . . . . . . . . . . 409
Fuses and Circuit Breakers . . . . . . . . . . . . . . . . . . . . . 411
Engine Compartment Fuse Block . . . . . . . . . . . . . . . . . . 412
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . 414 Rear Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . . 416
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . 418
All-Season Tires . . . . . . . . . . . . 419
Winter Tires . . . . . . . . . . . . . . . . . 419
Run-Flat Tires . . . . . . . . . . . . . . 420
Self-Sealing Tires . . . . . . . . . 420
Noise Reducing Tires(V-Series
Blackwing Only) . . . . . . . . . . . 421
Low-Profile Tires . . . . . . . . . . 421
Summer Tires . . . . . . . . . . . . . . . 422
Tire Sidewall Labeling . . . . 422
Tire Designations . . . . . . . . . . 423
Tire Terminology and Definitions . . . . . . . . . . . . . . . . . 424
Tire Pressure . . . . . . . . . . . . . . . 427
Tire Pressure for High-Speed
Operation . . . . . . . . . . . . . . . . . . 429
Tire Pressure Monitor System . . . . . . . . . . . . . . . . . . . . . 430
Tire Pressure Monitor Operation . . . . . . . . . . . . . . . . . . . 431
Tire Inspection . . . . . . . . . . . . . 435
Tire Rotation . . . . . . . . . . . . . . . 435
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . . 437
Buying New Tires . . . . . . . . . . 437