18149: Customer Satisfaction Program – Possible Inaccurate Fastener Torque – 2018-2019 Chevrolet Corvette

#18149: Customer Satisfaction Program – Possible Inaccurate Fastener Torque – (May 21, 2018)

Subject: 18149 Possible Inaccurate Fastener Torque
Models: 2018–2019 Chevrolet Corvette

Reference Number: N182157470 Release Date: May 2018
Revision: 00
Attention: This program is in effect until May 31, 2020.
Make Model Model Year RPO Description
From To
Chevrolet Corvette 2018 2019

Involved vehicles are marked “open” on the Investigate Vehicle History screen in GM Global Warranty Management system. This site should always be checked to confirm vehicle involvement prior to beginning any required inspections and/or repairs.

Condition Certain 2018 and 2019 model year Chevrolet Corvette vehicles may have a condition in which, the front and/or rear spring strap retainer bolts, and the front and/or rear stabilizer shaft clamp bolts may not have achieved the intended torque value. Under-torqued fasteners could result in suspension noise or shortened service life of components.
Correction Confirm the torque of the identified fasteners or replace the fasteners if bolts are one-time use. The Service Procedure below includes VIN specific information on which fasteners must be serviced for each affected vehicle.

 

Parts Information

Quantity Part Name Part No.
4 BOLT FRT STAB 11546672

Reminder: Parts may be removed from Retail Inventory Management (RIM). Dealers should review the affected parts to confirm RIM managed status. Parts may have quantity limiters in effect.

It is estimated that only 34 involved vehicles will require parts replaced on this vehicle. Due to the small number of vehicles anticipated that will need this fix and the limited initial parts availability, dealers are encouraged not to order these parts for use as shelf stock.

Only order this Bolt if your VIN is listed on this Bulletin.

 

Warranty Information

Labor Code Description Labor Time Trans. Type Net Item
9103829 Replace Front Stabilizer Shaft Insulator Clamp Bolts and Retorque Rear Stabilizer Shaft Insulator Clamp Bolts 1.1 ZFAT N/A
9103830 Replace Front Stabilizer Shaft Insulator Clamp Bolts 0.8 ZFAT N/A
9103831 Retorque Rear Stabilizer Shaft Insulator Clamp Bolts and Rear Spring Retainer Bolts 0.5 ZFAT N/A

 

Service Procedure

Service Procedure for Front Stabilizer Shaft Insulator Clamp Bolts Replacement and Retorque Rear Stabilizer Shaft Insulator Clamp Bolts for the following VINS:

1G1Y93D79J5105098 1G1YP2D69J5602353 1G1YT2D68K5500006
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in SI.
  2. Remove the front tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation in SI.
  3. Remove the front stabilizer shaft link front stabilizer shaft (x2). Refer to Stabilizer Shaft Link Replacement in SI.
  4. Remove (if equipped) the front brake rotor cooling duct deflectors. Refer to Front Brake Rotor Cooling Duct Deflector Replacement in SI.

front stabilizer shaft insulator clamp bolts

  1. Remove and DISCARD the front stabilizer shaft insulator clamp bolts.
  2. Remove the front stabilizer shaft clamps.
  3. Install the front stabilizer shaft clamps.
  4. Install NEW front stabilizer shaft insulator clamp bolts but DO NOT TIGHTEN.

8.1 When tightening the NEW front stabilizer shaft clamp bolts, alternate between the top and bottom bolts at each clamp and also alternate each clamp.

8.2 After the NEW front stabilizer shaft insulator clamp bolts have been tightened to specification, check each bolt and ensure a minimum of 50 Nm (37 lb ft) of torque has been achieved for each bolt.

8.3 Tighten the first pass 30 Nm (22lb ft)

8.4 Tighten the final pass 45-60 degrees.

  1. Install (if equipped) the front brake rotor cooling duct deflectors. Refer to Front Brake Rotor Cooling Duct Deflector Replacement in SI.
  2. Install the front stabilizer shaft link front stabilizer shaft (x2). Refer to Stabilizer Shaft Link Replacement in SI.

rear stabilizer shaft insulator clamp bolts

  1. Locate and retorque the rear stabilizer shaft insulator clamp bolts to 58 Nm (43 lb ft).
  2. Install the front tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation in SI.
  3. Remove support and lower the vehicle. Refer to Lifting and Jacking the Vehicle in SI.

 

Service Procedure for Front Stabilizer Shaft Insulator Clamp Bolts Replacement for the following VINS

1G1Y13D74K5000011 1G1Y93D73J5105243 1G1YD2D77J5106291 1G1YF2D74J5104685
1G1Y22D91K5700058 1G1Y93D78J5105187 1G1YD2D79K5100042 1G1YF2D76J5104686
1G1Y92D73J5300379 1G1YB2D73J5104687 1G1YD3D7XJ5105707 1G1YF3D74J5105986
1G1Y92D79J5300421 1G1YB2D76J5104490 1G1YF2D70J5104926 1G1YF3D7XJ5104468
1G1Y93D71J5104690 1G1YY3D75K5101845 1G1YF2D74J5104508 1G1YM2D72J5105145
1G1YP2D67K5600022 1G1YU2D67J5602182 1G1YT3D64J5601810 1G1YS2D60K5600023
1G1YR2D62K5600018 1G1YU2D6XJ5601866 1G1YY2D72J5104503 1G1YS2D63K5600727
1G1YW2D78J5105502 1G1YW2D7XJ5105162 1G1YY2D77K5101033
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in SI.
  2. Remove the front tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation in SI.
  3. Remove the front stabilizer shaft link front stabilizer shaft (x2). Refer to Stabilizer Shaft Link Replacement in SI.
  4. Remove (if equipped) the front brake rotor cooling duct deflectors. Refer to Front Brake Rotor Cooling Duct Deflector Replacement in SI.
  5. Remove and DISCARD the front stabilizer shaft insulator clamp bolts.
  6. Remove the front stabilizer shaft clamps.
  7. Install NEW front stabilizer shaft insulator clamp bolts but DO NOT TIGHTEN.

7.1 When tightening the NEW front stabilizer shaft clamp bolts, alternate between the top and bottom bolts at each clamp and also alternate each clamp.

7.2 After the NEW front stabilizer shaft insulator clamp bolts have been tightened to specification, check each bolt and ensure a minimum of 50 Nm (37 lb ft) of torque has been achieved for each bolt.

7.3 Tighten the first pass 30 Nm (22lb ft)

7.4 Tighten the final pass 45-60 degrees.

  1. Install the front stabilizer shaft clamps.
  2. Install (if equipped) the front brake rotor cooling duct deflectors. Refer to Front Brake Rotor Cooling Duct Deflector Replacement in SI.
  3. Install the front stabilizer shaft link front stabilizer shaft (x2). Refer to Stabilizer Shaft Link Replacement in SI.
  4. Install the front tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation in SI.
  5. Remove support and lower the vehicle. Refer to Lifting and Jacking the Vehicle in SI.

 

Service Procedure for Retorqueing Rear Stabilizer Shaft Insulator Clamp Bolts and Rear Spring Insulator Retainer Bolts for the following VINS

1G1YJ2D79K5000015 1G1YM2D7XK5101376 1G1YW2D79J5105704 1G1YK2D79J5106086 1G1Y13D70K5100106
1G1YT2D60J5300476 1G1YX2D71J5104317 1G1YX3D72J5105739 1G1YY2D76J5106139 1G1YS2D60K5600054
1G1Y92D7XJ5300508 1G1YY2D70J5104550 1G1Y12D71J5105744 1G1YY2D73J5106146 1G1YY3D7XK5100156
1G1YU2D66J5602268 1G1Y92D74J5300360 1G1YP2D6XJ5602152 1G1YY2D72J5106154 1G1YY3D79K5100164
1G1Y53D9XK5700055 1G1Y92D69J5601892 1G1YX2D77J5105813 1G1YY2D78J5106157 1G1YS2D69K5600070
1G1YA2D76J5106159 1G1YW2D7XJ5105002 1G1YS2D65J5602168 1G1YX2D71J5106231 1G1YS2D69K5600103
1G1YU2D67J5300634 1G1YS2D67J5601927 1G1YV2D76J5105825 1G1YV2D73J5106236 1G1Y12D70K5100472
1G1YB2D72J5106446 1G1YU2D66J5601931 1G1Y53D91K5700042 1G1YR2D68J5602337 1G1YS2D62K5600217
1G1YD3D76K5100148 1G1YK2D77J5105227 1G1YV2D75J5105850 1G1YW2D78J5106262 1G1YS2D69K5600246
1G1Y12D74K5100152 1G1YP2D66J5601970 1G1YY2D74J5105863 1G1YX2D76J5106306 1G1YR2D66K5600250
1G1YS2D69K5600117 1G1YU2D67J5300522 1G1YY3D76J5105952 1G1YS2D6XJ5602358 1G1YU2D68K5600264
1G1YW2D77K5100499 1G1YY2D74J5105328 1G1YM3D71J5105966 1G1YR2D65J5602392 1G1YP2D66K5600335
1G1YY2D72K5100548 1G1Y52D97K5700024 1G1YN2D68J5602236 1G1Y12D78J5106499 1G1YV2D76K5100853
1G1YB2D79K5100631 1G1YV3D76J5105460 1G1YY3D72J5105995 1G1YY3D77J5106513 1G1YY3D74K5101027
1G1YW2D74K5100749 1G1YX2D75J5105468 1G1YW2D72J5106001 1G1YX2D73J5106523 1G1YS2D67K5600424
1G1YY2D71K5100816 1G1YW2D73J5105648 1G1Y92D94K5700048 1G1YK2D75K5100013 1G1YY3D79K5101136
1G1YY2D70K5101097 1G1YS2D68J5602116 1G1YX2D76J5106063 1G1YY3D79K5100102 1G1YS2D64K5600476
1G1YS2D60K5600507 1G1YR2D63K5600660 1G1YS2D60K5600734 1G1YU3D61K5600807 1G1YU3D6XK5600711
1G1YR2D64K5600537 1G1YU2D67K5600675 1G1YW2D7XK5101839 1G1Y12D71K5102330 1G1Y92D75K5101805
1G1Y92D71K5101610 1G1YZ3D70K5101748 1G1YY2D73K5101840 1G1Y93D67K5600988 1G1YY2D70K5101861
1G1YX2D71K5101614 1G1YY2D72K5101618 1G1YS2D66K5600740
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in SI.
  2. Locate and retorque the 4 rear spring insulator retainer bolts (1) to bolts 67 Nm (49 lb ft)
  3. Locate and retorque the 4 rear stabilizer shaft insulator clamp bolts (1) 58 Nm (43 lb ft).
  4. 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, dealer-traded, 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.

 

Customer Notification

USA & Canada – General Motors will notify customers of this recall 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.


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. [remove this sentence if the repair includes an inspection or if no parts required]

If you have any questions or need any assistance, just contact your dealer or the appropriate Customer Assistance Center at the number listed below.

Division Number Text Telephones (TTY)
Chevrolet 1-800-630-2438 1-800-833-2438
Puerto Rico – English 1-800-496-9992
Puerto Rico – Español 1-800-496-9993
Virgin Islands 1-800-496-9994

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 Chevrolet Corvette provides you many miles of enjoyable driving.

Neelie O’Connor

Executive Director

North America Contact Center Operations

18149


 

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