23-NA-207

Bulletin No.:
Service Bulletin
Date:
23-NA-207
February, 2024
TECHNICAL
Subject:
Brand:
Chevrolet
Ticking, Rattle and/or Buzzing Noise Heard from inside Passenger Side
Model:
Camaro ZL1
Camaro ZL1 1LE
Model Year:
VIN:
from
to
from
to
2017
2024
—
—
Engine:
Transmission:
6.2L (LT4)
—
Involved Region or Country
North America, Argentina, Brazil, Bolivia, Chile, Colombia, Paraguay, Peru, Uruguay,
Europe, Russia, Middle East, Israel, Palestine, China, Thailand, Other Africa
Condition
Some customers may comment on a rattle, tick or buzz noise coming from the
passenger side.
– The noise may be louder inside of the vehicle rather than on the outside.
Cause
6483330
This condition may be caused by the fuel feed pipe between the high-pressure fuel pump
and chassis fuel line allowing high pressure pulsation back to the low side of the fuel
system.
– This may be due to a faulty pulse dampener internal to the part.
Copyright 2024 General Motors LLC. All Rights Reserved.
Page 2
February, 2024
Bulletin No.: 23-NA-207
6483325
Note: There is not a good way to test this pulse dampener. Following the line underneath
the vehicle, a sound check can be made in this location indicated in the graphic above, to
confirm the noise is present within the fuel line.
Correction
If the pulse dampener has been validated to be the cause of the noise, replace the fuel
feed pipe.
6483334
These graphic above shows the location of the chassis fuel feed pipe on the LT4 engine.
This line will run along the firewall and below the vehicle. It will have a jumper line with
quick disconnects at both ends. One end will connect to the chassis line and the other to
the high-pressure pump feed line.
Bulletin No.: 23-NA-207
February, 2024
Page 3
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.
Service Procedure
Refer to Fuel Feed Pipe Replacement in SI.
Parts Information
Note: Only select the parts that coincide with the repair
performed. Replace the part with the P/N outlined in the
Electronic Parts Catalog (EPC) in accordance with the
vehicle VIN.
Causal
Part
X
Description
PIPE ASMFUEL FEED
Part
Number
Qty
84404473
1
Warranty Information
For vehicles repaired under warranty, use:
Labor
Operation
4026830
Description
Labor Time
Fuel Feed Pipe
Replacement
Use
Published
Labor
Operation
Time
Version
2
Modified
Released January 22, 2024
Revised February 13, 2024 – Removed GM Korea Company from Involved Region or
Country section.
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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