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Power Train
03/21/2019
The contact owns a 2019 Chevrolet Corvette. The contact stated that while driving approximately 40 MPH, the accelerator pedal was depressed, and the vehicle shook and shuddered abnormally. The contact stated that the failure had been constant since purchasing the vehicle. There were no warning lights illuminated. The contact believed that the shudder was due to the high-performance engine. The contact had not taken the vehicle to the dealer to be diagnosed. The contact stated that during an alignment at a dealer, the service technician informed the contact that the shudder was a known failure caused by the transmission fluid, causing the torque converter to shudder whenever the accelerator pedal was depressed. The technician provided the contact information on TSB: 19-NA-018. The contact stated that the vehicle had not been diagnosed by the service technician using a diagnostic machine. The manufacturer was informed of the failure and referred the contact to the NHTSA Hotline for assis...
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Power Train
08/02/2025
A 2019 Corvette with 3,400 miles began to demonstrate a transmission torque converter shutter. This became rapidly and progressively worse causing driving to resemble being on a washboard road surface. The servicing dealer was familiar with the problem with this transmission and did resolve the issue with an expensive transmission fluid flush and exchange.
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Engine
02/02/2025
Engine needed to be replaced and it was but new engine misfiring and throwing knock codes and misfire codes. Contacted General Motors only to be told they can’t do anything about it and that’s unacceptable. Case number [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
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Fuel/propulsion System
04/28/2025
Fuel Filler Neck not Sealing
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Power Train
01/01/2025
GM has a well known issue with the transmission fluid used in assembly on a range of cars and dates which include my 2019 Corvette. The fluid used fails/ is defective. The process to fix the issue is to flush the fluid out and put in a different fluid. In the case of my Corvette, it actually requires a very expensive triple flush to ensure all of the original Dexron fluid has been removed and is replaced my Mobil fluid. The process is explained in an 18 page service bulletin 18-NA-355. This bulletin states that if a customer comes in complaining of shake/shudder during acceleration between 25 to 80mph or when the trans is not actively shaking, then there is no need to further diagnose. Just follow the procedure in the service bulletin. In other words, there is no need to investigate further because we already know what the problem is which is the defective Dexron fluid. This was my exact experience with the shake/shudder and the triple flush completely fixed the issue. My vehicle has 1...
