If they keep swapping batteries, the odds of the battery being at fault are low.
Sounds more like an issue with the Generator, ECM, BCM, Current Sensor, etc. I sent you a PM with lots of details.
I would ask the Service Rep / Tech to DETAIL all the steps they did to check it!
Did they check the duty cycle commanded to the generator by the ECM/BCM?
Did they check the battery current sensor?
Did they check for parasitic loss?
Did they check the BCM battery state of charge / indicated charge mode?

Some tools you could use to test it yourself:

Personally I have some slight concerns over the battery / voltage regulation circuit in my C8. Perhaps its a total coincidence, not sure, but I was doing work on my C8 brakes and I first disconnected my battery NEG terminal as you should if you want to keep your fingers intact!
Worked on my track prep / pad swap / DOT4 Castrol SRF fluid swap, and then I reconnected the battery ground.
I had a device connected to the USB-C port in the arm rest area and that little device FRIED nicely. Really??? Wow...thanks! Also had a USB-C thumbdrive working there for a while and it also fried.
I have a USB power tester / datalogger and connected that. It has a nice graph, very well regulated voltage with a slight ripple. I haven't tried graphing the output with a battery disconnect/reconnect sequence though.
Not sure, but from now on I disconnect EVERYTHING that is not part of the C8 from power before touching / removing the battery terminals.

 

I have a '24 vehicle, and it almost immediately throws a red low battery WARNING message on the infotainment if accessory mode is ON. It doesn't matter if the battery is fully charged, and even if the car connected to a smart charger (which typically is). The message always appears to prevent owners to run down the battery, not that it is run down already. I'd post the exact message in question, but suspect it's just that. And that'd be perfectly normal. On my '23, for example, it takes like 5 minutes to pop up. But on the '24, it pops right away.

 

I suspect the low battery warning is a software problem triggering the warning at too high of a voltage. That is why suggested (in another thread) checking the voltage at the battery terminals while the car is in accessory mode. My low battery warning doesn't come on until the car thinks it is below 11v so it would be useful to see what the actual voltage at the battery terminals is.

Also, I get a message to start the car when I get the low battery warning. Does your warning state that? If not, perhaps it is a different message and thinks the car is running when it displays that message (again potentially a software error).

 

Yes it does low battery start vehicle.

 

do you drive this vehicle every day? If not, how often do you drive it?

 

Yes, this is my everyday vehicle.

 

NVM/apologies as I misread. This is/was apparently isolated to the 22’s only…

https://www.corvetteblogger.com/2022...attery-charge/

 

Aloha everyone! Maui C8 here…started this thread almost 4 years ago. Great to see it’s been helpful for so many. I have a problem that I was wondering if anyone else has experienced and looking for some words of wisdom. My closed trunk is showing that it’s “open” and my convertible top is down. It won’t let me put it back up because of the trunk being “open”. Anyone else had this happen?

 

I heard of this happening once. If I recall, they disconnected the battery, let it sit for a bit, then reconnected and the ECM/BCM sorted it out.

 

Or turn car off, open the drivers door and leave it open for at least 90 seconds.

 

You can go into display tile selection and select one of the display tiles to show battery voltage, then you can keep an eye on it all the time. Mine shows 15.1 volts steady, all the time.

 

https://www.motorauthority.com/news/...ST_EMAIL_ID%5D


https://www.corvsport.com/end-of-202...eid=15f00e3bf1

 

I see your popcorn emoji and wonder why you even participate in the C8 section of this forum. You don't even own a C8. So you post a article about this popularity of the C8 Z06, then you post an article about C8 problems that apply to less than 2% of all owners. I wonder what satisfaction people like you get from doing this???

 

Not that I'm defending anybody but if you look at Fast Dawg profile you'll see that he does own a 21 HTC C8 and has owned other vettes. I don't see anything wrong with posting this info. He didn't write it.

Edit - Ah, my bad. You're talking about LS WON. You're Fast Dawg. OK, LS WON, why are you here???

 

i reade these posts and as i wait for my 24 I say, please let this be the small portion of owners making the loudest noise

 

It's always like that. The issue is determining if something is a random defect, or a design defect, like the DCT valve body seems to be. And then determine if you're the type who could live with recalls, and making dealer visits for things like that. Unfortunately, I'm not that type. Ha ha. So will wait until reliability seems better sorted. No rush in my case.

 

And the DCT is in it's 5th model year of the C8. No excuse for not having a near perfect trans. BMW's 8 speed is and has been amazing for yrs. Not a dual clutch, but, shifts
so darn fast and has a great reputation...overall.

 

He's been a member of this group for many years, and has always been a contributor. I see nothing objectionable in his posts. He's certainly entitled to express his opinions and concerns. No personal attacks, nothing insulting, no foul language … and a long time Corvette owner.

 

EXACTLY! And they're bulletproof, like most planetary-gear transmissions are. Even M cars don't have a DCT anymore, so don't understand what GM was thinking of choosing a finicky and much less reliable DCT (and from a first-time supplier, instead of a well-proven ZF or Getrag unit), over a regular ZF 8-sp, like on BMW M cars. Even the 'crappy' '23 G70 Sport Prestige I have shifts instantly up and down with the paddles, and it's an in-house Korean planetary-gear transmission too. I'd have taken THAT over the C8's DCT all day long. I'd have one in my garage by now. And then the ridiculous maintenance it requires, and by a dealer, which is an almost deal-breaker for me, since I don't want my new car messed with by mostly incompetent dealers (at least where I live). But it is what it is. Hope it gets better as the months go by, and hopefully even catch a discount later in the year. Just drove an F-Type P450, and the C8 drives better in every respect, so can't justify one. At least not until they're like $12K off MSRP, like '23s were, since my local dealer closed; no way I'd pay anywhere near MSRP. So will wait a few months and see what happens.

 

One advantage from GM's perspective is that DCTs are more fuel efficient that torque converter transmissions.