[Jaybub]

I'm having a clunking noise when going over bumps coming from the front driver side tire area. It's the same clunking noise described in Bulletin "PIC6276B Clunk Noise From Front Suspension At Low Speeds" and thread "WARNING: Front end Clunk - Loose Sway Bar Endlinks (please check yours) - CAMARO6" (https://www.camaro6.com/forums/showthread.php?t=489428)

The TSB fixes the issue by using a new nut (PN 11548382). My concern is that the TSB only covers model years 2016-2018 and I have a 2020. So I'm wondering, did the 2020s already come with this nut? Any ideas on how I can find this out?

I have a dealer appointment in a few days. I'm wondering if I should even show the service department the TSB or bring it up since my model year is outside the bulletin range. And if the 2020s already come with this nut, there's probably no point in pointing out the TSB.

Thanks!

[MyNameIs]

Since its a TSB....can the dealer charge you to address it or fix it?

[Bumbleboy92]

Originally Posted by MyNameIs

Since its a TSB....can the dealer charge you to address it or fix it?

If you’re in warranty then it should be free of charge, otherwise it’s a cost

[ember1205]

In reading through the TSB, it appears that the issue is that the nuts are not properly torqued. Yes, the guidance is to replace the nuts but that's because GM will consider those a disposable part "not to be reused." It does not appear to be any new design.

The corrective action is to remove the nut and replace it, applying thread-locker and torquing to spec. The question is why the torque level on them is not at this spec - did the spec change? Were they originally installed without thread-locker and could loosen? Did a batch of cars simply leave the factory without QA validating that they were torqued to spec? That's unclear / unknown...

The TSB was issued at the very beginning of the 2018 model year build time which means that vehicles built AFTER that would be done using the updated technique in the article (or the issue that led to the improper torque in the first place was otherwise eliminated during the build process).

The short version is that GM would have built cars after that date in a way that this should not be a more widespread issue than the occasional one-off situation. Could this be happening with your car? Yes. But, it would be more likely due to something use-related than possible improper torque from the factory.