20NA045

Bulletin No.:
Service Bulletin
Date:
20-NA-045
February, 2020
INFORMATION
Subject:
Black Sealant Material Visible on Wheel Edge
Model Year:
Brand:
Cadillac
Model:
CT4
from
2020
Involved Region or Country
VIN:
to
2020
from
to
Engine:
Additional
Options
(RPOs):
All
Equipped
with TIRE
ALL-235/
40R18 SL
91V BW AL3S (RPO Q4A)
North America, Middle East
Condition
5519310
Some customers may comment on black sealant material visible on the edge of the
wheel, resulting in a negative cosmetic appearance.
Copyright 2020 General Motors LLC. All Rights Reserved.
Page 2
February, 2020
Bulletin No.: 20-NA-045
Cause
5519311
This may be caused by sealant material being transferred during the mounting process
while using a clamp-type tire mounter.
Correction
If you encounter a vehicle with the above concern, clean the material off using the proper
cleaning materials.
Service Procedure
If you encounter a vehicle with the sealant visible, clean
the wheel using the tire bead and wheel mounting
lubricant, GM Part Number 12345884 (U.S.) and
88863415 (Canada).
Before Cleaning Wheel
5519313
5519312
Bulletin No.: 20-NA-045
February, 2020
Page 3
After Cleaning Wheel
5524090
Version
1
Modified
Released February 24, 2020
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these
technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper
service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a
job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your
vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the
information.
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