The C8 Corvette is the most advanced and revolutionary generation to roll off the Bowling Green Assembly line, and one of the most popular to date, but unfortunately, some issues come with those accolades. I’ve curated information from around the internet, so our faithful CorvSport community can be aware of what to possibly expect if you own or acquire one of these beautiful eighth-generation Corvettes.
Common Issues and Failures
This June 2023 “Tech Tuesday” Youtube video below from Corvette enthusiast, expert, and salesperson Rick Conti highlights two significant issues.
1) DCT Transmission Issues
This quote directly from Rick sums up the quirks of the Tremec TR9080 DCT transmission (at 7:15):
“I don’t feel like, (and it’s really starting to piss me off), that my transmission is what I had in my ’21… It doesn’t seem as smooth, it doesn’t seem as responsive…”
Twice during a recent road trip, Rick was accelerating normally up a hill and his C8 got “hung up” in gear, and as it approached the redline he had to use the paddle to manually shift gears.
The Remedies: The dealer will usually reflash the transmission’s computer (depending on what code is present) and/or add approximately 2 quarts of fluid. Transmission flushes are also common procedures the dealer will perform.
Additional Resources:
Click here for code P2856 information
Click here for a discussion on valve body replacement
2) Ticking Noise from LT2 Engine
At 9:18 in the same video, the GM technician who works with Rick goes into detail on the June 1st Bulletin from GM regarding a ticking noise from the base LT2 engine. This is a lifter noise that usually occurs during cold starts, and the technician makes sure to point out that this sound is different from the normal ticking-type noises that originate from the high-pressure fuel pump and direct injection fuel injectors.
3) LT6 Issues and Failures
Recently I did an up-to-date article (with videos) on the issues and failures the C8 Z06 LT6 is experiencing, and you can click here to read it.
Additional Resources:
LT6 engine failures/problems discussion from Corvette Forum (180+ comments)
4) Compilation of Common Issues
Click on the links below that interest you.
Lengthy Corvette Forum discussion (2700+ posts) on all the C8 issues and complaints
The delaminating dash issue on higher trims
Paint peeling around the headlights
Water intrusion and spots in the engine compartment
Recalls, TSBs, and Complaints by Year
1) 2020
Click here to check your Corvette by VIN and to see the full list of recalls and complaints
Click here for a CorvSport feature on 2020 Recalls
Click here for a comprehensive list of all 2020 Technical Service Bulletins (TSBs)
Summary
2) 2021
Click here to check your Corvette by VIN and to see the full list of recalls and complaints
Click here for a CorvSport feature on 2021 Recalls
Click here for a comprehensive list of all 2021 Technical Service Bulletins (TSBs)
Summary
3) 2022
Click here to check your Corvette by VIN and to see the full list of recalls and complaints
Click here for a CorvSport feature on 2022 Recalls
Click here for a comprehensive list of all 2022 Technical Service Bulletins (TSBs)
Summary
4) 2023
Click here to check your Corvette by VIN and to see the full list of 2023 complaints
Click here for a comprehensive list of all 2023 Technical Service Bulletins (TSBs)
Summary
I hope you have found this comprehensive C8 guide helpful. We have an active community on our Facebook page, I would love to hear from you! Douglas B.
