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Page 3 of 7

Customer Satisfaction Program
18149 Possible Inaccurate Fastener Torque
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1.

Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in SI.

5055860

2. Locate and retorque the 4 rear spring insulator retainer bolts (1) to bolts 67 Nm (49 lb ft)

Page 4 of 7

Customer Satisfaction Program
18149 Possible Inaccurate Fastener Torque

5055861
3. Locate and retorque the 4 rear stabilizer shaft insulator clamp bolts (1) 58 Nm (43 lb ft).
Remove support and lower the vehicle. Refer to Lifting and Jacking the Vehicle in SI.

Dealer Responsibility
All new, used, GM Certified Used, courtesy transportation vehicles, dealer shuttle vehicles, etc. in dealers' possession
and subject to this program must be held and inspected/repaired per the service procedure of this bulletin before
customers take possession of these vehicles. Involved vehicles must be held and not delivered to customers, dealertraded, released to auction, used for demonstration, or any other purpose.
All GM Certified Used vehicles currently in the dealers’ inventory within the Certified Pre-Owned Inventory System
(CPOIS) will be de-certified and must be held and remedied per the service procedure in this bulletin. Upon submitting
an accepted/paid warranty transaction in the Global Warranty Management (GWM) system, the vehicle can be re-certified
for sale within the CPOIS system, or once again be used in the CTP program.
Dealers are to service all vehicles subject to this program at no charge to customers, regardless of mileage, age of vehicle,
or ownership, through May 31,2020. Customers who have recently purchased vehicles sold from your vehicle inventory,
and for which there is no customer information indicated on the involved vehicle listing, are to be contacted by the dealer.
Arrangements are to be made to make the required correction according to the instructions contained in this bulletin. A
copy of the customer letter is provided in this bulletin for your use in contacting customers. Program follow-up cards
should not be used for this purpose, since the customer may not as yet have received the notification letter.
In summary, whenever a vehicle subject to this program enters your vehicle inventory, or is in your facility for service
through May 31, 2020, you must take the steps necessary to be sure the program correction has been made before
selling or releasing the vehicle.
Dealer Reports
For dealers with involved vehicles, a listing with involved vehicles has been prepared and will be provided to U.S. and
Canadian dealers through the GM GlobalConnect Recall Reports, or sent directly to export dealers. The listing may
contain customer names and addresses obtained from Motor Vehicle Registration Records. The use of such motor
vehicle registration data for any purpose other than follow-up necessary to complete this program is a violation of law in
several states/provinces/countries. Accordingly, you are urged to limit the use of this report to the follow-up necessary to
complete this program.
Courtesy Transportation – For USA & Canada
Courtesy transportation is available for customers whose vehicles are involved in a product program and still within the
warranty coverage period. See General Motors Service Policies and Procedures Manual, Sections 1.4 and 6.1.10, for
courtesy transportation program details.

Page 5 of 7

Customer Satisfaction Program
18149 Possible Inaccurate Fastener Torque
Customer Notification
USA & Canada - General Motors will notify customers of this program on their vehicle (see copy of customer letter included
with this bulletin).
Export - Letters will be sent to known owners of record located within areas covered by the US National Traffic and Motor
Vehicle Safety Act. For owners outside these areas, dealers should notify customers using the attached sample letter.

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 tools, equipment, 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 dealer for information on whether your
vehicle may benefit from the information.

We Support
Voluntary Technician
Certification

Page 6 of 7

Customer Satisfaction Program
18149 Possible Inaccurate Fastener Torque
June 2018
This notice applies to your vehicle, VIN: ________________________________
Dear General Motors Customer:
We have learned that your 2018 or 2019 model year Chevrolet Corvette may have been built with the front and/or rear
spring strap retainer bolts, and the front and/or rear stabilizer shaft clamp bolts not having achieved the intended torque
value. Under-torqued fasteners could result in suspension noise or shortened service life of components.
Your satisfaction with your Chevrolet Corvette is very important to us, so we are announcing a program to prevent this
condition or, if it has occurred, to fix it.
What We Will Do: Your GM dealer will confirm the torque of the identified fasteners or replace the fasteners if bolts are
one-time use. VIN specific information on which fasteners must be serviced for each affected vehicle has been provided
to your dealer. This service will be performed for you at no charge until June 30, 2020. After that, any applicable
warranty will apply.
What You Should Do: To limit any possible inconvenience, we recommend that you contact your dealer as soon as
possible to schedule an appointment for this repair. By scheduling an appointment, your dealer can ensure that the
necessary parts will be available on your scheduled appointment date.
If you have any questions or concerns that your dealer is unable to resolve, please contact the appropriate Customer
Assistance Center at the number listed below.
Division
Chevrolet
Puerto Rico – English
Puerto Rico – Español
Virgin Islands

Number
1-800-222-1020
1-800-496-9992
1-800-496-9993
1-800-496-9994

Text Telephones (TTY)
1-800-833-2438

We sincerely regret any inconvenience or concern that this situation may cause you. We want you to know that we will
do our best, throughout your ownership experience, to ensure that your GM vehicle provides you many miles of
enjoyable driving.
Terry M. Inch
Executive Director
Global Connected Customer Experience

GM Program: 18149

Page 7 of 7

GLOBAL SAFETY FIELD INVESTIGATIONS
DCS4749
URGENT - DISTRIBUTE IMMEDIATELY
Date:

May 14, 2018

Subject: 18149 - Customer Satisfaction Program
Possible Inaccurate Fastener Torque
Models: 2018 - 2019 Chevrolet Corvette
To:

All General Motors Dealers

General Motors is releasing Customer Satisfaction Program 18149 today. The
total number of U.S. vehicles involved is approximately 122. Please see the
attached bulletin for details.
Customer Letter Mailing
The customer letter mailing will begin on June 1, 2018.
Global Warranty Management (GWM)
The Investigate Vehicle History (IVH) screen in the GWM system will be updated May
15, 2018. A list of involved vehicles in dealer new inventory is attached to this
message. Please hold all warranty transactions until IVH has been updated.
END OF MESSAGE
GLOBAL SAFETY FIELD INVESTIGATIONS