Cadillac CT5 Problems by year

made it difficult to identify the source of the incident while operating the vehicle. Upon inspection, I discovered that the front sunroof glass had shattered. The glass appeared to have fractured and displaced outward, which is inconsistent with damage typically caused by road debris striking the exterior surface. I reviewed my vehicle's video recording from the time of the incident and found no evidence of any object impacting the sunroof immediately before the glass shattered. The sudden failure of the sunroof created a significant distraction while driving and presented a potential safety hazard to vehicle occupants and nearby motorists. The unexpected explosive sound could have caused a loss of vehicle control or led to a traffic accident. Dealer Response: Immediately after the incident, I brought the vehicle to an authorized Cadillac dealership for evaluation and warranty consideration. The dealership declined to process the repair as a vehicle defect or warranty claim and advised that the damage should instead be addressed through my automobile insurance carrier, Progressive Insurance. No evidence of an external impact was identified during my initial review of the incident, and the dealership did not accept the failure as a manufacturing or component defect. Insurance Claim: Following the dealership visit, a claim was immediately submitted to Progressive Insurance regarding the incident Claim number [[redacted]]. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

which the electronic parking brake is released and, if I actuate the EPB switch again shortly afterward to reapply the parking brake, the vehicle sometimes does not respond to that second input. The parking brake remains released and the expected parking-brake indication does not appear. If I wait longer and actuate the switch again, the parking brake applies normally. I have video showing this behavior. The issue has not yet been evaluated or confirmed by a Cadillac dealer. Inspections: The vehicle has been inspected in connection with the collision/insurance claim, but the EPB behavior has not yet been evaluated by Cadillac/GM or an independent service center. I intend to have Cadillac evaluate it. Warnings/symptoms: I did not observe a warning lamp, error message, or other indication that the EPB system had a fault before the incident. After the incident, I discovered the reproducible behavior described above. During an unsuccessful rapid reapplication, there is no apparent indication that the EPB has applied. Possible cause: UNKNOWN. I do not know whether this EPB behavior caused the incident. I am reporting it because I can reproduce a condition in which an apparent driver command to apply the electronic parking brake shortly after releasing it does not result in the parking brake being applied. I believe this warrants investigation to determine whether this is normal programmed behavior, a software/control issue, or a defect.