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,
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]?