ECU CADILLAC CT5 2022 Service Manual

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-15268585) -
2022 - CRC - 10/11/21
DRIVING AND OPERATING 223
{Warning
To avoid personal injury and/or
vehicle damage, always disconnect
the battery before performing
service work on the hydraulic brake
system. Bleeding the brake system
with the battery connected can lead
to excessive pressurization of the
system during automatic diagnostic
tests or diagnosis of a leak or air in
the braking system. A Diagnostic
Trouble Code (DTC) may set and
vehicle speed may be limited.
Brake Cooling (V-Series Blackwing)
Prior to any track event, high speed
driving event, or competitive driving,
complete the following: 1. Ensure all the brake cooling parts are correctly secured and installed.
2. Inspect and replace any deflectors that have damage.
3. Inspect for blockage in the front brake cooling duct prior to every
event.
4. Remove front tire deflector (if equipped). If improved brake cooling is desired
on vehicles with cast-iron brakes (RPO
JGH), install the ball joint protector
front shields, remove both upper and
lower rear rotor shields, and install
the rear lower control arm cooling
deflectors, per the instructions
included with the brake cooling kit.
These parts are for track use only.
After track events, reinstall the
original front and rear rotor shields
and remove the rear lower control arm
cooling deflectors.
Right Side Front Shown, Left Side
Front Similar
1. Front Lower Control Arm Deflector
2. Remove –Front Tire Deflector
3. Front Brake Cooling Duct
Brake Pad Wear Sensors
If equipped, the brake pad wear
sensors need to be removed from the
brake calipers prior to any track or
racing event. The original sensors can
be reinstalled if significant brake pad
wear is not observed. Refer to Brake
Pad Life System (If Equipped) 0351.
If the sensors are not reinstalled after
the track event, install brake pad wear
sensor plugs. See your dealer.
The V-Series Blackwing is equipped
with brake pad wear sensors which are
track capable and should not be
disabled for track and racing.

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-15268585) -
2022 - CRC - 10/11/21
226 DRIVING AND OPERATING
Caution
Brake fade will occur during this
track burnish procedure and can
cause brake pedal travel and force
to increase. This could extend
stopping distance until the brakes
are fully burnished.
1. From a stop, accelerate as rapidly as possible without activating
traction control to a speed of 100
km/h (60 mph).
2. Using the G-Force Gauge in the HUD display, use enough pedal
force to completely stop the vehicle
in four to five seconds. (~0.7g Decel
level to stop the vehicle in a
straight line). If ABS activates,
braking is too hard.
3. Repeat the first two steps 20 consecutive times, this should take
about five minutes.
4. After completing the 20 stops, cool the brakes by driving for 8 km
(5 mi) at 100 km/h (60 mph). Alternative Closed Course Brake
Burnishing Procedure
This brake burnish procedure should
only be run on vehicles with a factory
equipped brake system.
This procedure should only be run on
a track and only on dry pavement.
Brake pedal fade will occur during this
track burnish procedure and can
cause brake pedal travel and force to
increase. This could extend stopping
distance until the brakes are fully
burnished.
1. Start track lapping at lower speeds and lower braking efforts for
three minutes of driving. Allow for
increased braking distances due to
reduced brake output.
2. After Step 1, increase speed and braking effort for the next six
minutes of lapping, gradually
ending up at 90% effort. Continue
to allow for increased braking
distance due to reduced brake
output.
3. Cool the brakes by lapping with minimal light braking for six
minutes.
Wheel Alignment
Wheel alignment suggested specs for
track use:
Road Course (V-Series)
.Front: -2.0 deg camber, 0.2 deg
total toe
.Rear: -1.7 deg camber, 0.2 deg
total toe
Road Course (V-Series Blackwing)
.Front: -2.5 deg camber, 0.1 deg
total toe
.Rear: -1.5 deg camber, 0.1 deg
total toe
Tire Inflation Pressure
Guidelines
Tire inflation pressures affect vehicle
handling and tire life, and should be
adjusted for various types of tracks/
courses.
Inspect the tires prior to every track/
course session. Track/course driving
will reduce the tire tread life.
To maximize tire life, drive 800 km
(500 mi) prior to racetrack driving or
complete the minimum track running

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-15268585) -
2022 - CRC - 10/11/21
236 DRIVING AND OPERATING
weight of the driver, passengers,
and cargo should never exceed the
vehicle's capacity weight.
Certification Label
Label Example
A vehicle-specific Certification
label is attached to the vehicle's
center pillar (B-pillar). The label
may show the gross weight
capacity of the vehicle, called the
Gross Vehicle Weight Rating
(GVWR). The GVWR includes the
weight of the vehicle, all
occupants, fuel, and cargo.
{Warning
Things inside the vehicle can
strike and injure people in a
sudden stop or turn, or in a
crash.
.Put things in the cargo area
of the vehicle. In the cargo
area, put them as far forward
as possible. Try to spread the
weight evenly.
.Never stack heavier things,
like suitcases, inside the
vehicle so that some of them
are above the tops of the
seats.
.Do not leave an unsecured
child restraint in the vehicle.
.Secure loose items in the
vehicle.
.Do not leave a seat folded
down unless needed.
Starting and Operating
New Vehicle Break-In
Caution
Follow these recommended
guidelines during the first
2 414 km (1,500 mi) of driving this
vehicle. Parts have a break-in period
and performance will be better in
the long run.
.Avoid full throttle starts and
abrupt stops.
.Do not exceed 4000 engine rpm.
.Avoid driving at any one
constant speed, fast or slow.
.Do not drive above
129 km/h (80 mph).
.Avoid downshifting to brake or
slow the vehicle when the engine
speed will exceed 4000 rpm.
.Do not let the engine labor.
Never lug the engine in high gear
at low speeds. With a manual
transmission, shift to the next (Continued)

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-15268585) -
2022 - CRC - 10/11/21
DRIVING AND OPERATING 243
Warning (Continued)
.Before starting the vehicle,
unplug the cord, reattach the
cover to the plug, and securely
fasten the cord. Keep the cord
away from any moving parts.
4. Before starting the engine, be sure to unplug and store the cord as it
was before to keep it away from
moving engine parts. If you do not,
it could be damaged.
Contact your dealer for information
on how long to use the heater in your
particular area.
Retained Accessory
Power (RAP)
When the ignition is turned from on
to off, the following features (if
equipped) will continue to function
for up to 10 minutes, or until the
driver door is opened. These features
will also work when the ignition is in
RUN or ACC/ACCESSORY:
.Infotainment System
.Power Windows (during RAP this
functionality will be lost when any
door is opened)
.Sunroof (during RAP this
functionality will be lost when any
door is opened)
.Auxiliary Power Outlet
.Audio System
.OnStar System
Shifting Into Park
To shift into P (Park): 1. Hold the brake pedal down and set the parking brake. See Electric
Parking Brake 0255.
2. Press the button on top of the shift lever to shift into P (Park). See
Automatic Transmission 0246.
3. The P indicator on the shift lever will turn red when the vehicle is in
P (Park).
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
shift to P (Park). See Shifting Into
Park 0243. If you are towing a
trailer, see Driving Characteristics
and Towing Tips 0320.
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.

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-15268585) -
2022 - CRC - 10/11/21
DRIVING AND OPERATING 301
After completely passing a large
enough space, an audible beep occurs.
A red stop symbol and a shift to
reverse message are displayed.
If the vehicle is in R (Reverse), but
does not steer into the expected
space, this may be because the system
is maneuvering the vehicle into a
previously detected space. The APA
system does not need service.
APA will instruct the vehicle to stop
once a large enough space is found.
Follow the displayed instructions.
When instructed to drive in reverse,
shift to R (Reverse) to engage
automatic steering. The steering wheel
will vibrate briefly as a reminder to
remove hands from the steering
wheel. Check surroundings and
continue braking or accelerating asneeded, and be prepared to stop to
avoid vehicles, pedestrians, or objects.
If the vehicle exceeds 10 km/h
(6 mph), APA is automatically
disengaged.
A progress arrow displays the status
of the parking maneuver. Depending
on the space size, additional
maneuvers may be required, and there
will be additional instructions. When
changing gears, allow the automatic
steering to complete before continuing
the parking maneuver. APA will beep
and display a PARKING COMPLETE
message. Secure the vehicle against
rolling away by applying parking
brake.
APA may automatically disengage if:
.The steering wheel is used by the
driver.
.The maximum allowed speed is
exceeded.
.The parking brake is applied or the
vehicle is shifted into P (Park).
.There is a failure with the APA
system.
.Electronic stability control or
antilock brakes are activated.
.The driver opens the door with an
unbuckled seat belt.
The brake holds the vehicle until the
parking brake or brake is applied,
or the vehicle is shifted into P (Park).
To cancel APA, touch
Oagain.
When the System Does Not Seem to
Work Properly
The APA system may require a short
period of driving along curves to
calibrate.
Reverse Automatic
Braking (RAB)
Backing Warning and Reverse
Automatic Braking (RAB)
Vehicles with Adaptive Cruise Control
(ACC) have the Backing Warning
System and Reverse Automatic
Braking (RAB) system. When in
R (Reverse), Backing Warning alerts of
rear objects at vehicle speeds greater
than 8 km/h (5 mph), and RAB may
automatically brake hard at speeds
between 1–32 km/h (0.5–20 mph).

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-15268585) -
2022 - CRC - 10/11/21
DRIVING AND OPERATING 321
.Automatic Emergency
Braking (AEB)
.Intelligent Brake Assist (IBA)
.Front Pedestrian Braking (FPB)
If equipped with Lane Change Alert
(LCA), the LCA detection zones that
extend back from the side of the
vehicle do not move further back
when a trailer is towed. Use caution
while changing lanes when towing a
trailer.
If equipped with Rear Cross Traffic
Alert (RCTA), use caution while
backing up when towing a trailer, as
the RCTA detection zones that extend
out from the back of the vehicle do
not move further back when a trailer
is towed.
{Warning
To prevent serious injury or death
from carbon monoxide (CO), when
towing a trailer:
.Do not drive with the liftgate,
trunk/hatch, or rear-most
window open. (Continued)
Warning (Continued)
.Fully open the air outlets on or
under the instrument panel.
.Adjust the climate control
system to a setting that brings in
only outside air. See“Climate
Control Systems” in the Index.
For more information about carbon
monoxide, see Engine Exhaust
0 245.
Towing a trailer requires experience.
The combination of the vehicle and
trailer is longer and not as responsive
as the vehicle itself. Get used to the
handling and braking of the
combination by driving on a level road
surface before driving on public roads.
The trailer structure, the tires, and the
brakes must be all be rated to carry
the intended cargo. Inadequate trailer
equipment can cause the combination
to operate in an unexpected or unsafe
manner. Before driving, inspect all
trailer hitch parts and attachments,
safety chains, electrical connectors,
lamps, tires, and mirrors. See Towing
Equipment 0325. If the trailer has electric brakes, start the combination
moving and then manually apply the
trailer brake controller to check the
trailer brakes work. During the trip,
occasionally check that the cargo and
trailer are secure and that the lamps
and any trailer brakes are working.
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

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-15268585) -
2022 - CRC - 10/11/21
346 VEHICLE CARE
2.0L L4 Engine
Automatic Coolant Service Fill
Instructions
The vehicle is equipped with a service
feature that assists with filling and
removing air from the cooling system
after service of components or when
coolant is added after being too low.
To use the service feature:
1. With a cold system, add coolant tothe indicated line on the
surge tank.
2. Replace the pressure cap on the surge tank. To activate the service feature:
1. Connect the vehicle to a battery charger.
2. Turn the ignition on. See Ignition
Positions 0238.
3. Turn off the air conditioning.
4. Set the parking brake.
5. At the same time, press the accelerator and the brake pedal for
two seconds, then release.
6. At the end of the cycle, check the coolant level in the surge tank and
add coolant if it is below the
indicated line. Turn the ignition
off, allow the Electronic Control
Module (ECM) to go to sleep, about
two minutes, and repeat Steps 2–6.
Listen for pump activation and
movement of the control valves while
watching the level of the coolant in
the surge tank. If the tank empties,
turn the ignition off, carefully remove
the pressure cap, refill to the indicated
line, replace the pressure cap, and
repeat Steps 2–6.
The fill and air removal process will
run for approximately 15 minutes.
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.
3.0L V6 Engine and 6.2L
V8 Engine
1. Remove the coolant surge tank pressure cap when the cooling
system, including the coolant surge
tank pressure cap and upper
radiator hose, is no longer hot.
Turn the pressure cap slowly
counterclockwise. If you hear a
hiss, wait for that to stop. This will
allow any pressure still left to be
vented out the discharge hose.
2. Keep turning the pressure cap slowly and remove it.

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-15268585) -
2022 - CRC - 10/11/21
VEHICLE CARE 347
2.0L L4 Engine and 3.0L V6 EngineCoolant Surge Tank
6.2L V8 Engine Coolant Surge Tank 3. Fill the surge tank with the proper
mixture to the indicated
level mark.
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 fan.
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
surge tank until the level reaches
the indicated level mark.
5. Replace the pressure cap tightly.
6. Check the level in the surge tank after the engine is shut off and the
cooling system has cooled down.
If the coolant is not at the proper
level, repeat Steps 1–6. If the
coolant still is not at the proper
level when the system cools down
again, see your dealer.
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 indicator to warn
of the engine overheating.
If the decision is made not to lift the
hood when this warning appears, get
service help right away. See Roadside
Service 0435.
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. 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.

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-15268585) -
2022 - CRC - 10/11/21
396 VEHICLE CARE
Warning (Continued)
Battery fluid contains acid that can
burn you. Do not get it on you.
If you accidentally get it in your
eyes or on your skin, flush the place
with water and get medical help
immediately.
{Warning
Fans or other moving engine parts
can injure you badly. Keep your
hands away from moving parts
once the engine is running.
5. Connect one end of the red positive (+) cable to the remote
positive (+) terminal on the
discharged battery.
6. Connect the other end of the red positive (+) cable to the positive (+)
terminal of the good battery.
7. Connect one end of the black negative (–) cable to the
negative (–) terminal of the good
battery. Do not let the other end touch
anything until the next step. The
other end of the negative (–) cable
does not go to the dead battery.
It goes to a heavy, unpainted metal
engine part.
8. Connect the other end of the black negative (–) cable to the
negative (–) grounding point for the
discharged battery.
9. Start the engine in the vehicle with the good battery and run the
engine at idle speed for at least
four minutes.
10. Try to start the vehicle that had the dead battery. If it will not start
after a few tries, it probably needs
service.
Caution
If the jumper cables are connected
or removed in the wrong order,
electrical shorting may occur and
damage the vehicle. The repairs
would not be covered by the vehicle
warranty. Always connect and
remove the jumper cables in the
(Continued)
Caution (Continued)
correct order, making sure that the
cables do not touch each other or
other metal.
Jumper Cable Removal
Reverse the sequence exactly when
removing the jumper cables.
After starting the disabled vehicle and
removing the jumper cables, allow it
to idle for several minutes.
Towing the Vehicle
Caution
Incorrectly transporting a disabled
vehicle may cause damage to the
vehicle. Use proper tire straps to
secure the vehicle to the flatbed
tow truck. Do not strap or hook to
any frame, underbody,
or suspension component not
specified below. Do not move
vehicles with drive axle tires on the
ground. Damage is not covered by
the vehicle warranty.

Cadillac CT5 Owner Manual (GMNA-Localizing-U.S./Canada-15268585) -
2022 - CRC - 10/11/21
408 VEHICLE CARE
2. Reinstall by lining up the floor matretainer openings over the carpet
retainers and snap into position.
3. Make sure the floor mat is properly secured in place. Verify the floor
mat does not interfere with the
pedals.
Cleaning Rubber Floor Mats
(All-Weather Mats and Floor
Liners)
See “Vinyl/Rubber” underInterior Care
0 404 for important cleaning
information.