*Median odometer reading when the problem happened, where owners gave one. One complaint can name several problem areas.
Power train
The contact owns a 2019 Cadillac CT6. The contact stated that while driving at an undisclosed speed, the transmission unexpectedly shifted hard, and the service warning light was illuminated. The contact stated that while accelerating and decelerating, the vehicle shuddered and hesitated. There was smoke coming from the vehicle. The vehicle was taken to the dealer on several occasions. The dealer diagnosed the vehicle with transmission failure. The contact was informed that the transmission needed to be replaced. The contact stated that the failure was associated with a previous transmission software update. The failure mileage was approximately 47,000.
Mar 1, 2026 · 47,000 milesPower train
On July 22, 2025, at 20,245 miles, I brought my 2019 Cadillac CT6-V to an authorized dealer while still under factory warranty, reporting hard shifting during both acceleration and deceleration â the exact symptom described in GM Special Coverage Bulletin N242480631, which addresses a defective transmission control valve subject to premature wear (P0747 diagnostic condition). The dealer was unable to diagnose or repair the issue at that visit and returned the vehicle to me without resolving the defect. The same condition recurred. I brought the vehicle back to the dealer (Crestview Cadillac, Rochester Hills, MI) on May 26, 2026. The vehicle remained at the dealership for over three weeks…
Jul 22, 2025Power train
The contact owns a 2019 Cadillac CT6. The contact stated that while driving approximately 75 MPH, the wheels locked up and the vehicle started swaying from side to side, and the vehicle decelerated. The contact was able to coast to the side of the road and had the vehicle towed to an independent mechanic. The vehicle was diagnosed with rear differential failure, and DTC: P0747 (Transmission Solenoid Stuck Open); was retrieved. The differential was replaced. The contact then received notification of NHTSA Campaign Number: 25V148000 (Power Train); and the vehicle was taken to the dealer and repaired under the recall. The contact stated that after the recall repair, the transmission…
Aug 16, 2025 · 77,000 milesPower train
The contact owns a 2019 Cadillac CT6. The contact received notification of NHTSA Campaign Number: 25V148000 (Power Train); however, the part to do the recall repair was not yet available. The contact stated while driving at various speeds, the vehicle shuddered, and the transmission was shifting hard. There was no warning light illuminated. The vehicle was taken to the dealer, where it was diagnosed with a fractured transmission control valve. The dealer informed the contact that the failure was related to the recall, but the part to do the recall repair was not yet available. The vehicle was not repaired. The contact stated that the manufacturer had exceeded a reasonable amount of time for…
Jul 3, 2024 · 65,000 milesPower train
The contact owns a 2019 Cadillac CT6. The contact received notification of NHTSA Campaign Number: 25V148000 (Power Train); however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was made aware of the issue and confirmed that parts were not yet available. The manufacturer was made aware of the issue and confirmed that parts were not yet available. The contact had not experienced a failure. Parts distribution disconnect.
Jun 24, 2025Power train
The contact owns a 2019 Cadillac CT6. The contact received notification of NHTSA Campaign Number: 25V148000 (Power Train); however, the part to do the recall repair was unavailable. The local dealer was contacted, and it was confirmed that the part was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. While driving approximately 70 MPH, the wheels locked up, causing the vehicle to lose automotive power and decelerate. The vehicle was driven to the local dealer who diagnosed that the transmission had failed and needed to be replaced. The vehicle was not repaired. The…
May 23, 2025 · 84,000 milesPower train
The contact owns a 2019 Cadillac CT6. The contact received notification of NHTSA Campaign Numbers: 25V148000 (POWER TRAIN); however, the part to do the recall repair was not yet available. The contact stated that upon parking and exiting the vehicle, the vehicle rolled backwards approximately 1 to 2 feet. The driver's door was ajar with the driverâs foot near the vehicle, and the contact was able to depress the brake pedal and stop the vehicle. The contact pressed the Push to Start button, and after several attempts, moved the column shifter back and forth until the vehicle shifted to drive(D). There was no warning light illuminated. The contact stated that on a separate occasion, while…
Dec 5, 2024 · 50,000 milesPower train
The contact owns a 2019 Cadillac CT6. The contact received notification of NHTSA Campaign Number: 25V148000 (Power Train); however, the part to do the recall repair was not yet available. The local dealer was contacted and confirmed that parts were not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.
May 28, 2025
Owner complaints are submitted to NHTSA by the public and are not verified. Shown as filed (NHTSA removes personal details); long reports are shortened.