CT5-V Squeaking noise when pulling away from a stop or throttle at low RPM

[dlstelma]

I've got the same issue on my 2023 CT5BW, MN6. It happens when starting out from a stop and you can hear the squeal when gear/clutch is engaged and rpm's are low (near 1000) and you accelerate. You can't hear it when the windows are up...too insulated and thick glass. I brought it the dealer a few months after taking ownership. Dealer said "fixed." I get it back and they totally missed it! I wrote a nasty review and the dealer reached out to bring it back. Now, after reading this, not sure if there's a fix. It sounds embarrassing. Shouldn't be happening to a car of this caliber. And, I keep hearing on other diesel forums of the excuse of "that's normal." In other words, we don't know and don't want to spend the time to figure it out.

 

[KratosBear]

I've got the same issue on my 2023 CT5BW, MN6. It happens when starting out from a stop and you can hear the squeal when gear/clutch is engaged and rpm's are low (near 1000) and you accelerate. You can't hear it when the windows are up...too insulated and thick glass. I brought it the dealer a few months after taking ownership. Dealer said "fixed." I get it back and they totally missed it! I wrote a nasty review and the dealer reached out to bring it back. Now, after reading this, not sure if there's a fix. It sounds embarrassing. Shouldn't be happening to a car of this caliber. And, I keep hearing on other diesel forums of the excuse of "that's normal." In other words, we don't know and don't want to spend the time to figure it out.

I was told normal by the dealer as well. Honestly, I have gotten use to it now at 1500 miles.

 

[dlstelma]

Also, on cold start, I get the same squealing for about 20 seconds and then goes away...seems like waiting for oil to get around the system? probably more of the, "that's normal" prognosis.

 

[dlstelma]

I was told normal by the dealer as well. Honestly, I have gotten use to it now at 1500 miles.

i have about 3300 miles logged, but will keep an ear open for it to get worse. i guess piece of mind that i have the warranty...but, just annoying and embarrassing. my 99 corvette never did this!

 

[BrakeFade]

Also, on cold start, I get the same squealing for about 20 seconds and then goes away...seems like waiting for oil to get around the system? probably more of the, "that's normal" prognosis.

Happens on cold start? You sure it isn't your exhaust valves or some sort of exhaust resonance? I had a ford lightning way back in the day that would squeal only on cold start that ended being exhaust noise. The tech loosened up the exhaust, ran the vehicle up to temp, and then moved the exhaust by hand and retightened. No more squeal. The squeal/hum was some odd resonance sound from the exhaust.

 

[dlstelma]

The dealer thought the squealing was the exhaust and they adjusted something, but the cold start squealing is still there for a few seconds....then quiets downs/ disappears.

 

[Qasmoke]

Just bought a 2025 manual 5 BW recently and noticed this issue as well. Thinking whether I should bring it to the dealership or not? Is the issue really related to the exhaust?

 

[Qasmoke]

Did some testing today. The noise is also there when clutch pedal is fully out, and accelerating in first gear. It only happens very near idle rpm, and once past around 1k? rpm it's gone. I think when pulling from a stop, the clutch drops the rpm near idle, making the sound audible. Will probably bring it to the dealer at 1500 mile service and ask about this since the car drives fine otherwise.

 

[Savethemanuals]

Mine is a ‘24 with almost 4K miles and does it as well. I chocked it up to the clutch/flywheel (with no proof- just from experience or having modified flywheel vehicles making similar sounds during operation in low speeds) and gotten used to it at this point. Whole lotta power going through that tremec .

 

[Pani]

So is the consensus that this noise is normal? My new 2025 CT5-V BW exhibits the same squeak/squeal when accelerating from low rpms even when the clutch is fully engaged.

 

[Todd]

My 2025 MT 5BW makes a slight chirp noise, like from serp belt, sometimes at low speed engagement, especially when cold.

Meant to post here to ask, now watching this thread.

 

[vagabond]

Yes, normal near idle RPMs. Characteristic of the 6.2L. A cute GM quirk. You can also hear it on newer Escalades and Denalis starting and leaving parking lots.