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NHTSA ID Number: 10224823
Manufacturer Communication Number: 21-NA-192
Summary
This service bulletin provides repair information to correct a customer concern of the Convertible Top May Not Lower Intermittently, Technician may find DTC B19E4 SYM64 Stored in History.
Condition
Some customers may comment that the convertible top may not lower intermittently.
Technicians may find DTC B19E4 SYM64 stored in history.
Cause
Note: This hall effect sensor (2) is looking for the roof to be fully latched at the header.
We have seen cases where the hook is not extending far enough to reach the magnet (1).
The cause of the condition may be that the hall effect sensor, in the right side folding top front latch striker, may be out of position.
Correction
The simplest solution is to adjust the right side folding top front latch striker following the steps in the Service Procedure below.
Parts Information
No parts are required for this repair.
4 Affected Products
Vehicle
| MAKE | MODEL | YEAR |
| CHEVROLET | CORVETTE | 2020-2023 |
1 Associated Document
Manufacturer Communications
Bulletin No.: 21-NA-192
Date: October, 2022
https://www.nhtsa.gov/recalls?nhtsaId=10224823
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Last update on 2024-07-11 / Affiliate links / Images from Amazon Product Advertising API
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Copyright 2022 General Motors LLC. All Rights Reserved. Service Bulletin Bulletin No.: 21-NA-192 Date: October, 2022 TECHNICAL Subject: Convertible Top May Not Lower Intermittently, DTC B19E4 SYM64 May be Stored in History Brand: Model: Model Year: Date Breakpoint: Engine: Transmission: from to from to Chevrolet Corvette 2020 2023 — — All All Involved Region or Country North America, Middle East, Europe, Australia/New Zealand Condition Some customers may comment that the convertible top may not lower intermittently. Technicians may find DTC B19E4 SYM64 stored in history. Cause 5892481 Note: This hall effect sensor (2) is looking for the roof to be fully latched at the header. We have seen cases where the hook is not extending far enough to reach the magnet (1). The cause of the condition may be that the hall effect sensor, in the right side folding top front latch striker, may be out of position. Correction The simplest solution is to adjust the right side folding top front latch striker following the steps in the Service Procedure below. Page 2 October, 2022 Bulletin No.: 21-NA-192 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. 5389192 Bulletin No.: 21-NA-192 October, 2022 Page 3 Note: The windshield upper garnish molding must be completely removed. Removing fasteners on only one side and flexing the molding, may damage the part. This type of damage due to not removing the complete molding should not be submitted under warranty. 1. Remove the windshield upper garnish molding (2). Refer to Windshield Upper Garnish Molding Replacement (Convertible) in SI. 5892482 2. Locate the right folding top front latch striker and mark the location of the outboard bolt washer. 5892483 3. Loosen the right folding top front latch striker bolts (1). Refer to Folding Top Front Latch Striker in SI. 5892484 4. After loosening the 2 bolts, move the striker outboard 2 mm (0.08 in), attempting to keep the same fore/aft positioning. 5892483 5. Tighten the folding top front latch striker bolts (1). Tighten Tighten the bolts to 22Y(16 lb ft). 6. Ensure the folding top functions correctly and the code does not return. Page 4 October, 2022 Bulletin No.: 21-NA-192 5389192 7. Reinstall the windshield upper garnish molding (2). Refer to Windshield Upper Garnish Molding Replacement (Convertible) in SI. Parts Information No parts are required for this repair. 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 6086008* Adjust the Folding Top Right Front Latch Striker 1.3 hrs *This is a unique Labor Operation for bulletin use only. Version 3 Modified Released August 23, 2021 Revised February 18, 2022 – Added the 2022 Model Year, a Date Breakpoint and Europe to Involved Region or Country section. Revised October 04, 2022 – Added the 2023 Model Year, removed date Breakpoint, added Australia/New Zealand to Involved Region or Country section and added an Important statement at start of Service Procedure. 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
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