2020 Chevrolet Corvette Transmission and drivetrain Problems
- Complaints
- 6about this part
- Share
- 18%of 34 total for the year
- Median mileage
- 3,930miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 6 complaints about the transmission and drivetrain of the 2020 Chevrolet Corvette, 18% of the 34 complaints for this model year. Where a mileage was given, the median is 3,930 miles. 1 of these say a crash was involved, according to the filers.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“My left rear axel/rear differential/ control arm snapped with normal driving and breaking. It is available for inspection. This mechanical failure made me loose control of my vehicle on the busy freeway and threw me across a lane into the freeway center divider. Nearly caused a pile up accident and killed me.. The dealership service department checked it in today. I filed a claim today with the manufacture but nobody looked at it yet. There were no warning lamps and i believe there is still no warning lamps”
NHTSA complaint #11742799, filed 2026-06“I replaced the battery in my C8 Corvette after three years of ownership. Upon removing the plastic cover from the frunk to access the battery, I discovered the two front strut mounts. To my dismay, I noticed excessive corrosion on both strut mounts, with the left side near an AC compressor line being considerably worse. I immediately took the car to the dealership, where they took pictures and agreed it was a design defect. They submitted a warranty claim to GM, which was denied multiple times. …”
NHTSA complaint #11643898, filed 2025-02“I had a complete transmission failure while on a road trip over July 4th. I just read that GM was doing a recall on the Transmission Control Module but it does not include my car, which is what failed on my car at 19,000 miles. My trip was interrupted, we spent two days paying for hotel & rental car in Springfield, MO and now my car is fixed with new TCU in Springfield, but I live in DFW area. If my car had a recall I would have had it fixed before our trip and this all could have been avoided. Now I have to figure out how to get my car back home.”
NHTSA complaint #11531051, filed 2023-07“The contact owned a 2020 Chevrolet Corvette. The contact stated that while driving at an undisclosed speed, the contact came to a complete stop at a stop sign. The contact stated that the light turned green, the accelerator pedal was depressed, and the vehicle started jerking with a rumbling sound coming from the engine compartment. In addition, the engine independently shut off, however the transmission failed to properly shift, pressure level at zero, check engine light, idle creeping disabled, and service transmission warning lights illuminated. …”
NHTSA complaint #11561551, filed 2023-12, 7,200 miles“The dual clutch transmission on my 2020 C8 Corvette has a diagnostic code of p1955. This was determined after the service light on the vehicle illuminated and it was taken to service at the dealership. Other codes that stored included p0868 and p0869 which indicate low hydraulic pressure and high hydraulic pressure respectively. The p1955 code is an internal fault that requires complete replacement of the transmission according to GM service bulletins. This bulletin also advises that no repair attempts are to be made except for complete replacement. …”
NHTSA complaint #11737257, filed 2026-05Related service bulletins
- 11019516Apr 17, 2025This preliminary informational (PI) bulletin provides information to dealership personnel that may be helpful when addressing underbody component corrosion with customers.
- 11017254Mar 28, 2025This service bulletin informs the technician on the running changes to the M1L, M1M and MLH automatic transmission.
- 11013241Jan 14, 2025This service bulletin provides a Diagnostic Aid for PicoScope Information and Setup for Transmission Related Concerns.
- 11013069Jan 9, 2025This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
- 11012873Dec 19, 2024This service bulletin informs the technician on the running changes to the M1L, M1M, MLH automatic transmissions.
- 11011683Dec 4, 2024This Preliminary Information communication advises the technician on the need to provide additional information when creating a TAC case for a DCT transmission
- 11011989Nov 27, 2024This service bulletin provides information on the harmful effects of ethylene glycol in transmission fluid.
- 11011238Nov 18, 2024This Preliminary information communicates that due to parts shortages caused by the devastation of hurricane Helene we are restricting transmission assemblies in service.
- 11011387Nov 15, 2024This Preliminary Information communication advises the dealer the correct time, mileage and Labor operation used for the first covered Maintenace.
- 11011205Oct 28, 2024This informational bulletin explains Unscheduled Supplemental Services and the importance of GM Simplified Maintenance Schedules.
Transmission and drivetrain: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2025 | 1 | 9% |
| 2024 | 2 | 10% |
| 2023 | 8 | 30% |
| 2022 | 5 | 24% |
| 2021 | 7 | 54% |
| 2020 | 6 | 18% |
| 2019 | 10 | 7% |
| 2018 | 1 | 2% |
| 2017 | 2 | 1% |
| 2016 | 12 | 12% |
| 2015 | 18 | 28% |
| 2014 | 9 | 14% |
| 2013 | 3 | 4% |
| 2012 | 2 | 4% |
| 2011 | 11 | 13% |
| 2010 | 4 | 5% |
| 2009 | 6 | 4% |
| 2008 | 32 | 6% |
| 2007 | 51 | 15% |
| 2006 | 33 | 9% |
| 2005 | 70 | 13% |
| 2004 | 2 | 1% |
| 2003 | 11 | 13% |
| 2002 | 3 | 2% |
| 2001 | 5 | 2% |
| 2000 | 7 | 3% |
| 1999 | 12 | 4% |
| 1998 | 18 | 5% |
| 1997 | 3 | 2% |
| 1996 | 6 | 14% |
| 1995 | 3 | 9% |
| 1994 | 4 | 14% |
| 1993 | 3 | 14% |
| 1991 | 1 | 4% |
| 1990 | 1 | 3% |
| 1989 | 2 | 13% |
| 1988 | 2 | 13% |
| 1985 | 2 | 13% |
| 1984 | 1 | 7% |
| 1981 | 3 | 50% |
Other parts of the 2020 Chevrolet Corvette
10 complaintsOther or unknown
5 complaintsEngine
4 complaintsVisibility (wipers, defrost, mirrors)
4 complaintsBrakes
3 complaintsElectrical system
3 complaintsSuspension
2 complaintsBack-over prevention (rear camera)
1 complaintsEngine cooling
1 complaintsExterior lighting
1 complaintsFuel system
1 complaintsWheels
1 complaints
← All problems reported for the 2020 Chevrolet Corvette
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology