Bulletin No.:

Service Bulletin

Date:

17-NA-239
October, 2023

INFORMATION
Subject:

Information on Normal Characteristic - Vehicle Unable to Move After Being Parked for
an Extended Period of Time
This bulletin replaces PIC6083A. Please discard PIC6083A.

Brand:

Cadillac

Model:

VIN:
to

ATS

2013

2019

CT4

2020

2022

CT5

2020

2022

CTS (VIN A)

2014

2019

Camaro SS

2010

2024

2012

2015

2017

2024

Caprice PPV

2014

2017

Corvette

2014

2024

SS

2014

2017

Camaro ZL1
Chevrolet

Model Year:
from

from

to

—

—

Engine:

Transmission:

—

—

Involved Region or Country

North America, Argentina, Brazil, Chile, Colombia, Ecuador, Paraguay, Peru, Uruguay,
Europe, Russia, Middle East, Israel, Palestine, Japan, Cadillac Korea (South Korea), GM
Korea Company, China, Taiwan, Thailand, Singapore, Philippines, Africa

Additional Options (RPOs)

Cadillac CT4 and CT5 equipped with RPO J55, J56, JE2, J6G, and J6H
Note: This condition does not affect models equipped with Carbon Ceramic Rotors
(RPO J57).
Some customers may comment that when they go out and try to move their vehicle after it
has been parked for a period of time, they may have heard a "crunch" type noise right
before the vehicle starts to move.

Condition

Copyright 2023 General Motors LLC. All Rights Reserved.

⇒ Depending on how long the vehicle has been parked, the weather conditions
in which the vehicle was parked in, and how recently the vehicle has been
washed, the customer's concerns may range from simply a noise when the
vehicle first moves, all the way up to the extreme instance where a vehicle
cannot be moved out of the parking space.

Page 2

Information

October, 2023

Bulletin No.: 17-NA-239

Important: Do Not replace any components for this concern under warranty. This is the
dealer's storage responsibility to move the vehicles when weather permits. This will help
with the brake pads rusting to the rotors. Please review latest version of Service Bulletin
21-NA-043 for additional new vehicle storage recommendations.
This condition may be caused by the brake pads frozen to the vehicle's rotors.
• High performance brake components have a tendency to lightly bind, often noted as
resistance, then lightly clunk when attempting to move the vehicle forward or rearward
after a cold soak. This is usually noticed after parking, when the brakes have been
wet, as in driving in the rain or just after a car wash. This is expected for high
performance brakes with high friction pads and does not affect the operation or
performance of the brakes.
• If a residual roughness is felt when braking, it can easily be cleaned by applying the
brakes several times until the roughness is gone. If washing the vehicle prior to long
term storage, it is recommended that the vehicle be driven, and brakes applied
several times before putting the vehicle in storage.
Note: Parking the vehicle on a slippery surface like ice should be avoided when binding
conditions are possible to eliminate the risk of the vehicle being difficult to move at a
later time.

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.

Parts Information
No parts are required for this repair.

Customer Information
Please communicate to the customer this condition is a
normal operating characteristic of their vehicle. It will
not impact the designed performance or reliability of the
vehicle. Please share this information with the
customer, including a copy of this bulletin.
Version

9

Modified

Revised January 16, 2018 – Updated the Camaro Model and Model Year information and
added the 2019 Model Year to Corvette.
Revised April 18, 2018 – Updated the Important statement in the Information section.
Revised July 13, 2018 – Added the 2019 Model Year to applicable vehicles.
Revised October 02, 2020 – Added 2020 Chevrolet Corvette, 2020-2021 Chevrolet
Camaro ZL1 and SS, removed Camaro Z28, updated Involved Region or Country section
and added Additional Options (RPOs) section to exclude RPO J57.
Revised February 10, 2022 – Added the Cadillac CT4 and CT5 models, 2022 Model Year
to Camaro models, 2021–2022 Model Years to Corvette and information to Additional
Options (RPOs) section.
Revised February 06, 2023 – Added the 2023 Model Year to Camaro and Corvette and
an Important statement above the Parts Information.
Revised October 03, 2023 – Added the 2024 Model Year to Camaro and Corvette.
Revised October 12, 2023 – Updated Bulletin reference 09-00-89-002 to 21-NA-043 in
Information 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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