C8 problems
Heel & Toe
Joined: Feb 2021
Posts: 16
Likes: 16
P0651 code
Anyone else encounter P0651 code?
My 2020 c8 w/z51 got hit by this last Friday. Dealership can't figure out what's happening... they're working through schematics and talking with GM technicians to figure out what's wrong.. it's been at their shop ever since.
Only have 2300 miles on it - and I don't beat up my cars
My 2020 c8 w/z51 got hit by this last Friday. Dealership can't figure out what's happening... they're working through schematics and talking with GM technicians to figure out what's wrong.. it's been at their shop ever since.
Only have 2300 miles on it - and I don't beat up my cars
Drifting
Joined: Jun 2021
Posts: 1,292
Likes: 752
From: Phoenix, Arizona
It is not a problem but one thing I don't like about the C8 other than the bad break dust is the large key fob. Others that I have are smaller and easer to carry in your pocket. If I truly had my choice I would have a simple old fashion key.
Le Mans Master
Joined: Apr 2020
Posts: 6,378
Likes: 3,290
Burning Brakes
Joined: Sep 2020
Posts: 807
Likes: 562
\
Known issue on some, drain tube off AC is not connected properly. Do a quick thread search, several people show detailed info on how to correct it.
Advanced
Joined: Sep 2020
Posts: 63
Likes: 52
When I picked up my car on Saturday, there were 2 other C8's at the dealer that were being repaired for transmission problems. A lot of the issues just aren't being reported.
Put a 100 miles on the car yesterday....drove around Lake Mead, it was a mild 120 degrees out! Keeping my fingers crossed for no more leaks!
Dronepilot
Put a 100 miles on the car yesterday....drove around Lake Mead, it was a mild 120 degrees out! Keeping my fingers crossed for no more leaks!
Dronepilot
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Instructor
Joined: Aug 2019
Posts: 248
Likes: 118
From: Virginia
Yep, compared to my Audi TTRS it's like 20% of the dust I find on that thing. Every drive there's a caked layer of dust and the wheels are gunmetal lol. Wild. Also I don't have any squealing on mine compared to the TTRS, which chirps like birds in a forest.
Advanced
Joined: Sep 2020
Posts: 63
Likes: 52
Since they are Brembo brakes maybe that is normal, and the fact they are an option on the Z51 doesn't mean anything? I don't know, I have no experience with these brakes but as I am considering putting in an allocation for a MY22 Z51 it is something to consider. Thanks for the knowledgeable input.
Safety Car
Joined: Jan 2021
Posts: 3,658
Likes: 1,939
Where do you feel you can even get a 2022 model allocation at this point? Everybody is up in arms and one person even questioned if their March 21 deposit would actually go in to 2023. It sure is a crazy mess for everybody? I recommend getting your deposit down today and don’t keep thinking about it.
Moderator
Joined: Jul 2005
Posts: 29,322
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From: West MI
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St. Jude Donor '11-'17, '21
5th Gear
Joined: Jun 2021
Posts: 5
Likes: 1
From: Forest City, FL
The dealer took 2 weeks to replace the valve body, then the next day I had a huge transmission leak in the garage. I had it towed back to the dealer. They advised the pan gasket was “defective” but got one installed in 5 days. I just got back from a 4400 mile road trip to Maine and the car ran great, 30mpg average and flawless transmission shifts even on all the mountain roads😎
Last edited by Corvette4fun!; Jul 24, 2021 at 04:40 PM.
Advanced
Joined: Jun 2009
Posts: 90
Likes: 31
From: Redmond, WA
Curious, has anyone tried to figure out what is the percentage of C8s with transmission issues in light of the number of cars produced thus far? Should be possible. I ask this since there is some debate within the forum as to whether this issue is statistically significant enough to warrant concern. You know, the "only folks with problems post" argument. The math is not that difficult. We know the exact number of cars actually produced. If we can get an exact count as to all the forum members which have had an issue with their transmission, then get the number of all C8 owners which are on the forum, we should be able to get a good statistical picture of the extent of the problem.
Burning Brakes
Joined: Sep 2020
Posts: 807
Likes: 562
Curious, has anyone tried to figure out what is the percentage of C8s with transmission issues in light of the number of cars produced thus far? Should be possible. I ask this since there is some debate within the forum as to whether this issue is statistically significant enough to warrant concern. You know, the "only folks with problems post" argument. The math is not that difficult. We know the exact number of cars actually produced. If we can get an exact count as to all the forum members which have had an issue with their transmission, then get the number of all C8 owners which are on the forum, we should be able to get a good statistical picture of the extent of the problem.
Le Mans Master
Joined: Apr 2013
Posts: 6,671
Likes: 4,143
2020 C8 of the Year Finalist - Unmodified
50% of the time my seat does not return to its set position. It stops about half way. I have to press the 1 button and it moves to the correct final location.
Anyone have an idea why? I'm sure its using standard GM stuff.
Anyone have an idea why? I'm sure its using standard GM stuff.
Last edited by Sin City; Jul 27, 2021 at 02:08 AM.
Safety Car
Joined: Jan 2021
Posts: 3,658
Likes: 1,939
Curious, has anyone tried to figure out what is the percentage of C8s with transmission issues in light of the number of cars produced thus far? Should be possible. I ask this since there is some debate within the forum as to whether this issue is statistically significant enough to warrant concern. You know, the "only folks with problems post" argument. The math is not that difficult. We know the exact number of cars actually produced. If we can get an exact count as to all the forum members which have had an issue with their transmission, then get the number of all C8 owners which are on the forum, we should be able to get a good statistical picture of the extent of the problem.
In my quick research it appears that there are at least two completely different unrelated DCT problems that result in DCT replacement. One is internal component failure and the other is leaking porosity through the case. Just looking at DCT issue threads, it might appear as one big problem, but it really appears to be several smaller ones deserving their own polls.
Personally I feel the “chime in if you have no problems” threads useless as they’re largely made up of people with less than 2k miles.
