Cadillac CT4 2023 Owner's Manual page 307

306 Vehicle Care
High Performance Brake Lining Car Wash
and Extended Parking Care
If equipped with high performance brake
components, binding or clunking may be
noticeable after extended parking or in cold
weather when the brakes have been wet,
such as when driving in the rain or after a
car wash. The clunking is normal for brakes
with high performance brake linings and
does not affect the operation of the brakes.
When driving, normal braking will allow for
the brakes to feel smooth and the clunking
to go away. If the vehicle is washed before
overnight parking or long term storage,
drive it and apply the brakes several times
to thoroughly dry the brakes.
Brake Rotor Wear (V-Series Blackwing
With J57 Carbon Ceramic Rotors)
The V-Series Blackwing with J57 has carbon
ceramic brake rotors. The rotors should be
visually inspected whenever the brake pads
are replaced. Carbon ceramic brake rotors
also need to be weighed before brake pads
are replaced to confirm that the rotor mass
is greater than the wear-out mass printed
on the rotor. The rotor can be reused if the
weight of the rotor is above the mass limit.
Carbon ceramic brake rotors inspection and
weighing methods can be found in the
service manual.
V-Series Blackwing Brake Burnish
Procedure for Corrosion Cleanup
Corrosion spotting and grooving on the
brake rotor surface may appear after the
vehicle sits for an extended period of time,
especially in high humidity. This corrosion
may result in brake pulsation and noise. To
help restore optimal braking performance
and reduce noise, complete the following
procedure:
Caution
Performing the brake burnish procedure
on a base brake system can result in
brake damage.
Perform this procedure only on dry
pavement, in a safe manner, and in
compliance with all local and state
ordinances/laws regarding motor vehicle
operation.
Caution
The new vehicle break-in period should be
completed before performing the brake
burnishing procedure or damage may
occur to the powertrain/engine. See New
Vehicle Break-In 0 200.
Caution
Brake fade can occur during this burnish
procedure and can cause brake pedal
travel and force to increase. This could
extend stopping distance until the brakes
are fully burnished.
Completing the following procedure as
instructed will not damage the brakes. The
brake pads may smoke and produce an
odor. The braking force and pedal travel
may increase. After the procedure, the brake
pads may appear white at the rotor contact.
1. Using the G-Force Gauge in the HUD
display, apply the brakes 10 times
starting at 100 km/h (60 mph) to
50 km/h (30 mph) while decelerating at
0.4g. SeeHead-Up Display (HUD) 0 107.
This is a medium brake application. Drive
for at least 0.5 km (0.3 mi) between
applying the brakes.