One more C8 for us poor slugs including Road & Track and Car and Driver.

Pretty sure most new vehicles have teething issues especially with a 100% ground up completely new vehicle.

Perhaps some actual numbers on issues real or perceived would ground this discussion.

 

I'm always curious as to why people claim this, and use it as an excuse to justify problems? It's not a "100% ground up, completely new vehicle", not even close. How long has GM been producing 6.2L V8 engines? The LT2 is a slightly worked over LT1 that was used for the last 7 years, "The LT2 expands the small-block’s capabilities with more-efficient intake and exhaust manifolds, a more-robust lubrication system, and a new camshaft. It uses the same bore and stroke, as well as the same forged crankshaft, rods, and 11.5:1-compression-ratio pistons, as the LT1 upon which it’s based."
The C7 used a double-wishbone front suspension, the C8 uses the same. The C8 has coilover springs compared to previous leaf springs, but still uses other typical components as previous generations. Magneride shocks are available just as they were on previous generations. The suspension is updated and upgraded due to the needs of the car, but that occurs in every new gen.

The DCT is new - and perhaps that is a partial explanation of why there seem to be many issues with it. But those issues should have already been identified and solved during their million miles of testing prior to launch. Still has 4 wheels, still has disc brakes, still using Brembo calipers. The HTC has a retracting hard top, but that's been in use for decades by other manufacturers. The list goes on, just because "only 1 part carried over" from the C7, and the engine's moved behind the seats doesn't make it a 100% ground up completely new vehicle.

Owner's should not be experiencing major component failures with such few miles on a $60-100k vehicle.

 

Well don't buy one then. solve all your worries. Then you can spend your time on something useful other than ragging on and on every few days. have one sell it, so simple.

 

permitmefour Thanks so much for your post

 

New motor
New suspension
New transmission
New cooling system
New electronics
New lubrication system
New tires

 

This tread should be merged with the " no manual transmission -effect on sales" thread and should be labeled " disgruntled, miserable, people thread who complain about Corvette"

 

Agree with Grey & kratedisease.

Where are the numbers to back up the naysayers? Time to put up... or

 

Let me start off by saying I understand there will be problems with any new model BUT. My C8 has been at Les Stanford since 12/7. It went in originally because the battery went dead then the trans locked up, I disconnected the battery over night it came back to life and started shifting again. It needed the trans update so I thought i'd take it in and see if there was a code that showed what had happened. After 2 tries the update took I was then told there was a graphics update that needed to be done. After 2 tries the dash went black and that's where were at since the 7th. The mechanic has tried everyday to get help waiting up to 2 hours on the line. The last two days he can't get anyone to even talk. Come on lets get my damn car fixed or at least TRY.

 

Sorry for all your issues, its a bad time of the year. They will fix it and you’ll be having a blast. This reminds me when computers first came out, bad boards, bad code. Certainly electronic gremlins combined with technicians who need an upgrade in training and support.

This car has more technology than a space capsule! Its great when it works - your day is coming.

Aren’t computers great?

 

The point of this tread is to share info regarding common issues, period. What a great idea on the outset. I myself am glad this thread exists.

Sharing data and outcomes of common issues, and issues to be on the look out for is so helpful, and adds value to this forum as an owner or as a soon to be owner.

Instead its turning into a " complaint box" , full of "why can't GM make a issue free, perfect car" from what I see as mostly non-owners (justifying their reason not to own a C8) chirping in to make it worse for owners already frustrated with valid warranty issues.

Just like the "manual transmission effect on sales" thread has turned into a complaint box full of disgruntled negativity.

lots of CRANKY OLD MEN on this forum unfortunately. (ones that need to take the little blue pill or have 'the pump' installed down there-- believe me if they were getting it regularly, they would not be so cranky and negative)






.





.

 

I need to state that I also purchased a 2020 Lincoln Aviator for wifey at the same time I ordered my 2020 Corvette.

We lemon lawed the first Lincoln Aviator that we received, and could not believe how bad it was. There is not enough space to list all the major issues it had. Transmission broke, steering broke, rear hatch stuck, electronic gremlins, instrument display went blank/bad, water leaks in the doors and HUGE mis-aligned panel gaps. It had to be flat bedded ( dragged up the flatbed because of driveline seizure failure) twice. We only were able to put 3K miles on the car. Our car has a $75K window sticker.

We had the car four weeks, before it stayed at the dealer for six weeks straight while they TRIED unsuccessfully to repair all the issues.. Ford accepted to re-aquire the car under lemon law with No fight and No attorney.

Wifey L-O-V-E-D the car, despite all the issues. Loved the design, features, and its tech when it worked. We immediately re-ordered another to be built in our specs and colors. 5 months later ( delay due to Covid) we received the new replacement Lincoln Aviator and now 6 months later into using the Aviator for six months and 5,000 miles later the car arrived with ZERO defects. YES, I said ZERO. Amazingly, not one thing wrong. So far Perfect.

Wifey is very happy and is so delighted that the replacement one we ordered has been issue free.

It was NOT the end of the world. No one died, no one got cancer. And just incase, I bought an extended warranty/service contract on this replacement Aviator for 8 yrs/80K miles for $1500.


.

 

It seems some C8 owners are being effectively serviced by GMC.

 

This is by far the funniest post I've ever read on the CF!!!

 

what bull shiX

 

Hi, all -

Wanted to relay a few issues I've been having with my C8.

1. I'm seeing some odd and scary behavior in response to flooring the throttle while cruising along in high gear. Normally I am in tour mode when I'm just driving around, occasionally sport, but since I'm normally in tour mode I can't say for certain whether it's happened in sport. But basically, it has happened both in lower-speed cruising (around 35-45 mph) and at highway speeds (60-70 mph): I'll be driving along in a high gear, nail the throttle, and the vehicle goes into a much lower gear, and then either exhibits rev-limiter type behavior (vehicle is not picking up speed, just parked at some midrange RPM level as though it's hitting rev limiter) or hesitates at a given RPM for a moment, bucks/surges, and finally accelerates as desired.

But it does not happen every time, it is sporadic. Last weekend I had it happen once while on the highway, tried again a few more times afterwards, same results, then when I exited and tried at lower speed it repeated a few more times. But the other day while trying to duplicate it on video, I had the exact opposite happen: it took a number of attempts to *get* it to happen. And then, in the most-recent (first) video, it did it mildly on first attempt, and then much more severely on the second attempt, which is shown in first video below.

Here are four videos of it doing it to varying degrees:
This is the latest video from the other day (turned on overlays this time, watch what revs do when this happen, foot is NOT taken off of gas during that time, it is pedal to the metal). Throttle is floored at 0:04 into the video and it downshifts immediately, but look at tach and what happens from then until just before 0:07 when it actually starts moving:

And here are three other videos of it doing it, with varying pauses from time it downshifts into lower gear in response to full throttle and beginning to actually accelerate. I do not release throttle from the floor until a second or so after it starts accelerating as it should.



Second issue is a whine from back end. Became noticeable around 700 miles or so and has worsened (1700 miles as of now). This occurs either under very light acceleration or light-throttle steady speed, and range seems to be increasing (was 37-50 mph, now it's extended out to up to 55 mph). Pitch of whine increases with vehicle speed. It is independent of gear. It stops in response to additional throttle pressure or throttle release. It stops if clutch is engaged (pulling back both paddles simultaneously). Below 37 or so mph or above 55 it is not present. Dealer filed TAC with Chevrolet, but they stated it was a slight whine: it is not slight, it is loud and can be heard over the radio at its peak (45 mph). Chevrolet in response to TAC stated this is "normal", but I've owned a number of performance vehicles, and it certainly wasn't present in any of them.

Wondering if anyone else is experiencing either of these issues?

Thanks in advance!

 

How many miles are on the car?

 

I see now 1700 miles, normal for the trans to drop down into power gears under hard acceleration. Best suggestion run it by the dealer, they can download the data, and logged systems. They can tell you if something is wrong.

 

The new C8 has so many issues it is on track to be the GM version of the "Yugo"- thinking of cancelling my 2021 Z51. I do not want a car that looks good, but is a piece of crap.

 

Sorry for you and all C8 owners having so many problems - it is turning out to be a real nightmare in failing parts, NO quality control, bad engineering, never ending software problems, transmission, engine failures. Owners deserved better than this piece of unreliable crap with one problem after another-might as well buy a used Ferrari if you just want to have something that looks good but you can never rely on to get you where you want to go.

 

I'm waiting for all the issues to work out too