Need help with CT5V BW vibration

[BimmerFan]

Bad gas may have water in it.

I hope that truly was it, and that you don't have any further issues!

 

[Dan Scully]

So, as some of you might know, we’ve got 2024 six speed has a vibration on deceleration highway speed 80 2000+ RPMs brought it to the dealer pico scope sent to GM Of course they say everything is normal in my opinion it’s not. If there’s anyway I could get a ride with somebody in their car in Northern New Jersey, northern PA lower Hudson Valley. Don’t want to put anybody out. I’d make arrangements whatever time works for you. Any help greatly appreciated. I really just want to find out if this is actually normal for a manual car. Thanks in advance.
Richard

Dear ‘Slick’
I have a 2024 5BW manual trans with the same problem you describe - vibration sets in around 2000RPM in 5th and 6th gears when coasting in gear. Depressing the clutch, shifting to neutral or applying throttle removes the vibration.
Based on dealer PICO test, GM approved a new engine, but this did not correct the vibration. Currently waiting on GM to approve further investigation and correction.
What is the current situation with your vibration issue?