24-NA-026
Service Bulletin Details
Public Details for: 24-NA-026
This service bulletin provides a procedure to correct a customer concern of convertible top leak around side glass in high pressure car wash.
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Bulletin No.: Service Bulletin Date: 24-NA-026 February, 2024 TECHNICAL Subject: Convertible Top Water Leak Around Side Glass in High Pressure Car Wash Brand: Model: Chevrolet Corvette Model Year: VIN: from to from to 2020 2024 — — Engine: Transmission: All All Involved Region or Country North America, Europe, Middle East, Japan, Australia/New Zealand Additional Options (RPOs) Convertible (RPO CM9) Condition 6543378 Some customers may comment about a water leak from approximately the middle rear of the side glass area during a touch-less or other high pressure car wash. Cause The cause of the condition may be due to slight variations in sealing between the roof panel seals. Correction Follow the Service Procedure outlined below to correct vehicles that may be experiencing this condition. Copyright 2024 General Motors LLC. All Rights Reserved. Page 2 February, 2024 Bulletin No.: 24-NA-026 Service Procedure 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. 1. Partially retract the top until access to both ends of the top panel are easily accessible. 6535551 6535549 2. Pull on the front side window weatherstrip to remove it. 5. Install the foam as shown in the photo. Place the long edge of the foam just inward of the rolled outboard edge of the top, but not on the edge itself so that the foam is less visible when the top is closed. Place the foam’s narrow edge just forward of the trailing edge of the top panel. Reposition the existing narrow foam strip slightly inboard to accommodate the size of the added foam. 6. Reinstall the front side window weatherstrip retainer using the three T-25 bolts. Note: The retainer should cover some of the added foam to help retain it in the event that the adhesive fails over time. 7. Watch the video before re-installing the weatherstrip. Important: Weatherstrip installation is sensitive to position, and the leak can be worse than before if the installation is incorrect. 8. If the customer noted leaks on both sides, repeat this procedure for the remaining side. If not, it may not be worth disturbing the existing weatherstrip performance. 9. Verify the leak is corrected before returning to customer. If the leak persists, try adjusting the weatherstrip position again per the video. 6535550 3. Remove the front side window weatherstrip retainer by removing these three bolts (size T-25). 4. Cut a 12 mm x 45 mm piece of semi-closed EPDM foam, ¼ inch thick. (See Parts Information) Bulletin No.: 24-NA-026 February, 2024 Page 3 Parts Information A sheet of suitable EPDM semi-closed foam can be obtained through Grainger, item ID 60DA20. 6535552 Causal Part Description Part Number / ID Number Qty N/A EPDM SemiClosed Foam* 60DA20 1 * We believe this source and their products to be reliable. There may be additional manufacturers of such products/ materials. General Motors does not endorse, indicate any preference for, or assume any responsibility for the products or material from this firm or for any such items that may be available from other sources. Warranty Information For vehicles repaired under the Bumper-to-Bumper coverage (Canada Base Warranty coverage), use the following labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage information. Labor Operation Description Labor Time 6086068* Convertible Top Roof Panel Leak Repair 0.5 hr Add Additional Side 0.2 hr *This is a unique Labor Operation for bulletin use only. Version 1 Modified Released February 01, 2024 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. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION