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I sold my c6 a while ago and have been thinking about getting into a c7. I searched around some and was looking for some clarification, did the c6 issues like clutch master cylinder failure, harmonic balancer issues, fuel pump failures electrical headaches bcm issues get worked out in the c7's?
Any other issues showing up in c7 as some are coming up on a decade old
I had to repair a faulty infotainment screen. Early years, I think only 14&15 screen would go black and need a new cable replacement or screen replacement.
I sold my c6 a while ago and have been thinking about getting into a c7. I searched around some and was looking for some clarification, did the c6 issues like clutch master cylinder failure, harmonic balancer issues, fuel pump failures electrical headaches bcm issues get worked out in the c7's?
Any other issues showing up in c7 as some are coming up on a decade old
Fuel issue on mine which appeared right after I purchased the car. It was covered under a technical service bulletin. Five thousand miles later zero problems on a 2014. I currently am at 26,000 miles. I like the C7 much better than 05 Corvette that I purchased new and drove to 82,000 miles. The only problem I had with the C6 was a harmonic balancer at 72,000 miles and only about $1400.00 to repair. You hear all the bad things about C6 and C7 Corvettes however most of them run 100,000 or more trouble free miles. Make sure the transmission shifts nicely before buying since that is probably the most common problem.
C7 15 Z51 A8 and now 19 GS A8 both had the triple flush under warranty. Both had an aggressive track alignment so tire wear. Later model years have CarPlay wired. Check the serpentine belt tensioner as it seems to have a higher than average failure rate. Drive it like you stole it and enjoy. Bought forged wheels for the GS.
Last edited by Richard Ames; Dec 17, 2023 at 06:16 PM.
Reason: Update
None of the issues you mentioned but here’s a short list of the most common ones:
1. Torque converter issues on the A8 cars caused by going in and out of 4-cylinder mode.
2. Stuck AFM lifters or ticking caused by going into 4-cylinder mode.
3. 3LT leather dash delamination caused by poor/uneven adhesive application at the factory.
4. Torque tube wobble and misalignment caused by worn rubber dampeners, more prevalent on auto cars.
5. Cracked Grand Sport and Z06 wheels.
6. Failing infotainment screen caused by tension/friction on the flex ribbon cable from the screen going up and down.
Look into getting a manual, 2LT/2LZ and get forged wheels if going with a GS/Z06. Those cars are least likely to have major issues.
I've owned a 2019 base and a 2017 Z51. Both manuals, both 1LT. No cracked wheels, no infotainment issues, no de-laminating dashboards or torque tube issues. Just good ole big-motor fun and lots of folks giving me the thumbs up.
Although only 1 Z06 had the transmission shudder, I had the trans flush done on all of them. It eliminated the shudder in that Z06. The ONLY problem I had was bent rims. But the oem's were $350ish 2 years ago..
If I was to buy another Corvette, it would be a C7.
None of the issues you mentioned but here’s a short list of the most common ones:
1. Torque converter issues on the A8 cars caused by going in and out of 4-cylinder mode.
2. Stuck AFM lifters or ticking caused by going into 4-cylinder mode.
3. 3LT leather dash delamination caused by poor/uneven adhesive application at the factory.
4. Torque tube wobble and misalignment caused by worn rubber dampeners, more prevalent on auto cars.
5. Cracked Grand Sport and Z06 wheels.
6. Failing infotainment screen caused by tension/friction on the flex ribbon cable from the screen going up and down.
I was going to create a list but it would be pretty much what this says. I would just add that the A8 issues were resolved once the triple flush with the new transmission fluid is performed. If you buy an A8 that's shifting well, if you aren't certain the triple flush was performed with the newest fluid, I'd have it done because that's way cheaper than replacing the torque converter if it fails.
Fuel odor issue, expensive!
Auto transmission issue In general the triple flush with the new transmission fluid seems to have resolved most of the complaints that involved trucks and large SUVs besides the Corvette.
Wheel crack, bending on GS and Zs
targa roof fly off I'd say that is an operator problem that has existed on all T or Targa top Corvettes since 1968.
Probably a few more....
The clutch master cylinder can suffer the same issue as the C5s and C6s. I have put a lot of miles on the C5/C6/C7 platforms since 1997 and have only had minor issues with the clutch. In 12 years I never had a problem with either of my C5s and during 6 years of having a C6Z only had one issue which GM fixed under the special warranty for the clutch master cylinder. With the 15Z I had the clutch start dropping to the floor while on track (pulled up with my foot and never happened on the street) near the end of the B2B warranty so GM fixed that problem by replacing the master cylinder. That was 5 years ago and the problem hasn't returned.
was this the same fuel odor issue as the c6? The plastic fuel line connector cracking?
Yes, same problem. If you read a lot of the posts in this forum and the C7 tech forum, you will learn about many common, and some not so common, C7 concerns. Evidently the 2015 through 2016 A8 cars had a riveted flex plate that has a Tech bulletin TSB 15-NA-045 suggesting it be replaced with the later/better bolted design - use the forum search to read about that. That is another labor intensive job, similar to the fuel pump replacement, and is not covered by any GM special coverage. Also, there has been recent threads about valve springs breaking in the C7s' which is rather unnerving. Fuel door lock rod sticking that prevents the fuel door from opening pops up now and then - it just popped up again last week.
2019 GS, M7 with 18K miles. The only problem I've had is the OEM GS rear wheels cracking. Replaced with those GM OEM ZR1 wheels with no other issues (so far). Happy hunting!
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C7 general questions
