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I have a 2015i with 8 spd transmission. Tranny has been replaced to address the "clunk on take off" issue. I also had, and still have, a chirp or quick squeak coming from 3rd row area that happens consistently when throttle is applied slightly accelerating gradually from a coast. Most notable in town around 30 - 40 and easily duplicatable. I drove my brother-n-laws 2015 Tahoe and it exhibits a slightly lower chirp doing the same thing. Dealer has heard it but cannot figure it out. No TSB on it either. Anyone else have this issue and found a cure? It is not the same as the high pitched whine coming from diff control unit that has been reported in a few threads although my Escalade and my b-n-l's Tahoe both have this as well and there is actually a TSB on it with a "no fix" resolutions from GM. Thanks!
 

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2015 Mercedes CLS63 AMG S
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I could be wrong, but this might be the V4 to V8 flapper "squeak".

From what I understand, when the vehicle goes from V4 to V8, a mechanical flap is opened or closed, this causes a squeak sound.

Occurs any time more throttle is applied if the vehicle was cruising in V4 mode and kicked in to V8.
 
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I have a 2015i with 8 spd transmission. Tranny has been replaced to address the "clunk on take off" issue. I also had, and still have, a chirp or quick squeak coming from 3rd row area that happens consistently when throttle is applied slightly accelerating gradually from a coast. Most notable in town around 30 - 40 and easily duplicatable. I drove my brother-n-laws 2015 Tahoe and it exhibits a slightly lower chirp doing the same thing. Dealer has heard it but cannot figure it out. No TSB on it either. Anyone else have this issue and found a cure? It is not the same as the high pitched whine coming from diff control unit that has been reported in a few threads although my Escalade and my b-n-l's Tahoe both have this as well and there is actually a TSB on it with a "no fix" resolutions from GM. Thanks!
Hello POSRX,

I can see how this chirp would be concerning and I apologize for any frustration this issue has caused. I know you have worked with the dealership on this, but I would like to offer an additional layer of assistance from my end as well. If you are interested, please send a PM my way with your VIN, mileage, dealership name, and personal contact information. Once I have this, we can further discuss the situation.

Enjoy your day,

Austin J.
Cadillac Customer Care
 

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Hello POSRX,

I can see how this chirp would be concerning and I apologize for any frustration this issue has caused. I know you have worked with the dealership on this, but I would like to offer an additional layer of assistance from my end as well. If you are interested, please send a PM my way with your VIN, mileage, dealership name, and personal contact information. Once I have this, we can further discuss the situation.

Enjoy your day,

Austin J.
Cadillac Customer Care



Cadillac Care - I have the same issue with this chirp. The dealership is trying to charge me $440.16 to do an Exhaust Neutralization Procedure. Could you please get in touch with me @ [email protected]?
 
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