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I just replied in another thread that I found and this was suggested in the similar thread box. Has anyone's noise come back? Mine goes away when unplugging the vac line from the passenger side turbo. I've read on the FB groups of several people have turbos replaced on for the noise to return.

Was just pointed to this thread from one of the facebook groups. I too have this dreadful squeak. 3600 miles on the car and it's been doing it since about 1000 miles. 2024 M6. As was mentioned above, I'm fairly certain it's the passenger side waste gate. It goes away when I remove the vac line...

I've heard about the rattle and how you can use washers or throttle body/carb springs to remedy that. This truly sounds like a mechanical squeak - almost like metal on metal that needs to be lubricated. It's mostly just annoying/embarassing when you go to drive away and start squeaking like a...

Did a quick search and couldn't find anything. Does anyone get a squeaky sound from their passenger side waste gate when they blip the throttle? I've narrowed the sound down to the passenger side WG because it stops doing it when I pull the vacuum line from the intake. Starts again when I...

Hey everyone, apologies for not updating this thread for a while - life got in the way. After 47 days in the shop, countless parts replaced and two visits from GM field engineers, I'm happy to say that they finally were able to fix the issue. Per the writeup I have, the root cause was poor...

Updated the original post but as of today, I'm waiting on GM to approve a replacement or buyback. Should know more on Thursday or Friday of this week. I did not seek litigation through the attorney. Instead, I opened a case with Cadillac support and through the BBB's Auto Line dispute resolution...

Greatly appreciate your thoughts. I just spoke with, and opened up a customer support case directly with Cadillac. The rep was very nice and easy to work with. She did say that a buyback is an option we could pursue, and it sounds like I have a case for that; but she needed to do some more...

Yeah, totally agree. I've been very patient and fair with them throughout this process. Not pestering them daily. Not getting angry, etc. I have a personal connection to the Service Manager (friend of a friend) and I know he's doing all he can; but he's at the mercy of GM. I really don't want...

Lemon law for new vehicles is pretty straight forward, and at this point I'd be well within the precedent to pursue. Unfortunately, in Florida it doesn't apply to used or CPO cars. We'd have to pursue the Magnuson-Moss act. Attorney has told me that we have a case once it's been in service for...

I appreciate the feedback, and while agree that they've been doing all they can, at what point is it excessive? 30 more days without resolution? 60? Curious to know if GM would ever throw in the towel and say that they don't know what's wrong with it... There's also the randomness with which...

How does one start that process? Go outside of service and speak with the GM of the dealership to explain the scenario?

I've suggested replacing the batter and starting with the most basic things first; to which they said no - we have to follow protocol based on the codes that were thrown, etc. I agree with you that it is very likely something related to voltage spikes/dips, but I can't change GM's mind.

To start the process of what exactly?

None that I'm aware of. My SA pulled up the vehicle service history in front of me, and I didn't see anything that would be indicative of this being a prior problem; though I only glanced at the screen.

*Updated as of 1146ET on 4/24* Figured I'd take to the forums to share my current experience and also (hopefully) learn from others. I'll continue to update this thread as things progress. TL;DR: My 2024 CPO 4BW (purchased with 400 miles in mid-December) has been in service with Cadillac for...

Ok, so an update. First off, I have nothing plugged into the OBD II port and never have. It happened to me again today. Had been driving completely normal since the last episode until this afternoon. Stopped at the light in front of my neighborhood when suddenly I get the service rear axle...

I left the negative terminal off the battery last night. Just went out and reconnected it and the car started right up. No CEL or errors are present. The digital cluster also works as normal. WTF

Not sure how related my scenario is but coming home last night my dash lit up and the engine completely shut down (thankfully we were in the neighborhood already). Started throwing lots of errors on the dash (like service axle). HVAC shot up to full blast and I couldn’t shut off the parking...

Something odd happened this morning. Car wouldn't start, gauge cluster wouldn't come on, etc. Thought it was a dead battery but after a few attempts (locking, unlocking seemed to make it work) I was finally able to get the car to fire up only to find a CEL for the aforementioned systems. Took...

Cyber Yellow CT4BW checking in from Tampa! Just bought it on Sunday and this color is insane.