PIC6538

Bulletin No.: PIC6538
Published date: N/A
Preliminary Information
PIC6538 Diagnostic Tip - Repeat Brake Pulsation
Models
Brand:
Model:
Model Years:
VIN:
from
Engine:
to
Transmissions:
Cadillac
CT4-V
2022 - 2024
All
All
All
All
Cadillac
CT5-V
2022 - 2024
All
All
All
All
Involved Region or Country North America
Additional Options (RPO)
Condition
Cause
CT5-V - J57 or J6H
CT4-V - J6G
A customer may comment of a repeat brake pulsation. The pulsation may return
within 1,000 miles after the rotors were replaced to correct the concern.
Customer painted wheels , paint on wheel hub surface causing pulsation due to the
hub not being true.
Correction:
Inspect wheels for being painted
Above Image of Customer Painted Wheel - Note: Black Wheels not o ered as OEM.
Above Image shows paint on the hub surface of the wheel, this paint may also get transferred to the hub bearing
surface.
The paint on the hub surface caused the lateral run out to be .001 over spec of .002 which was enough to cause
thickness variation of the rotors.
If customer painted wheels are found to be the cause of the concern, the wheel and hub bearing surfaces will
need to be cleaned of paint, thickness variation of the rotors checked and replaced if out of speci cation.
Version History
Version
Modi ed
1
02/05/2024 - Created on.
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