19-NA-042

Bulletin No.:
Service Bulletin
Date:
19-NA-042
October, 2023
INFORMATION
Subject:
Brand:
Chevrolet
Yellow Tint to ZR1 Hood and Engine Cover Exposed Carbon Fiber Parts
Model:
Model Year:
VIN:
from
to
Corvette ZR1
2019
2019
Corvette
2020
2024
from
to
Engine:
Additional
RPOs
All
—
—
All
Coupes
equipped
with RPO
ZZ3 or SLN
Involved Region or Country
North America, Europe, Middle East, Japan
Condition
Some customers may comment the exposed carbon fiber engine appearance panels for
the C8 generation vehicles, or the ZR1 exposed carbon fiber hood parts appear to have a
yellow tint appearance when compared to other exposed carbon fiber parts.
Cause
The cause of the condition may be that the carbon fiber hood and engine cover use a
different impregnated carbon fiber resin, which is more heat resistant. The different resin
may cause a color shift; and the lighting source and direction of view will sometimes
highlight this color shift.
Correction
There is no problem with the paint application on these carbon fiber parts, and NO repair
attempts should be made to change the color of the parts.
Important: Service agents must comply with all
International, Federal, State, Provincial, and/or
Local laws applicable to the activities it performs
under this bulletin, including but not limited to
handling, deploying, preparing, classifying,
packaging, marking, labeling, and shipping
dangerous goods. In the event of a conflict between
the procedures set forth in this bulletin and the
laws that apply to your dealership, you must follow
those applicable laws.
Version
3
Modified
Released February 28, 2019
Revised August 24, 2022 – Added 2020–2023 Corvette Model equipped with ZZ3,
updated the Involved Region or Country section and Condition.
Revised October 17, 2023 – Added the 2024 Model Year and updated the Additional
RPOs column for Corvette and added the Important statement.
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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