2019 Cadillac CT6 problems

Filed Nov 1, 2026 · Seats · TX

I am submitting this safety defect complaint to the federal safety agency regarding the unexpected failure of the front passenger head restraint in my Cadillac CT6-V. My vehicle recently underwent infotainment system repairs at Crest Cadillac, an authorized GM dealership. The passenger seat had not been occupied for several months. When a passenger recently sat in the seat, the head restraint unexpectedly fell over and became nonfunctional. There was no collision, impact, misuse, or known event explaining this failure. The vehicle is currently at an authorized GM dealership for evaluation. I am concerned that this failure may be associated with the recent dealership repairs or an underlying component defect. More concerning, two individuals in an online Cadillac CT6 owners’ group stated that this particular component fails more frequently than one would expect. These reports suggest a potentially recurring safety defect rather than an isolated incident. Federal Motor Vehicle Safety Standard No. 202a (49 CFR § 571.202a) establishes mandatory head restraint safety requirements intended to reduce neck injuries during collisions. A broken head restraint compromises occupant protection and increases the risk of serious injury during rear-end collisions. I request that the federal safety agency investigate this failure, review similar complaints involving Cadillac CT6 vehicles, and determine whether a systemic manufacturing, design, or servicing defect exists that warrants a safety recall or corrective action. I also request preservation of the failed components, dealership service records, and diagnostic findings. This is a serious failure of federally regulated occupant safety equipment, not a cosmetic or routine warranty issue.

Filed Sep 15, 2026 · Transmission · 47,000 miles · NV

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.

Filed Jul 27, 2026 · Transmission · FL

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 — 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 before any loaner vehicle was offered. Replacement parts were reported as received on July 3, 2026, and again on July 17, 2026, and as of this filing the vehicle has still not been returned to me — over two months out of service. The repair estimate is approximately $12,000, covering the transmission control valve, a power transfer case, and a high-pressure oil pump. GM Special Coverage Bulletin N242480631 states that the control valve body replacement is covered at no charge for vehicles that return with a P0747 condition after the TCM software update, for 15 years or 150,000 miles from the in-service date, regardless of ownership. My vehicle meets these conditions. Despite this, GM's case team has offered only a $4,500 "goodwill" credit plus reward points toward the total repair, characterizing this as a discretionary gesture outside of warranty, and has stated this is their final position. I am filing this complaint because: (1) the original recall/coverage remedy did not resolve the underlying defect when I first brought the vehicle in under warranty, resulting in continued use of a vehicle with an unrepaired safety-related transmission defect until the condition worsened; (2) GM's dealer network has taken an extended and, in my view, excessive amount of time to complete.

Filed Oct 8, 2025 · Transmission · 77,000 miles · MI

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 the federal safety agency 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 experienced hard shifting, with the check engine warning light illuminated. The contact stated that the check engine warning light was illuminated before the recall was issued. The vehicle was returned to the dealer, but was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 77,000. The VIN was not available.

Filed Jul 3, 2025 · Transmission · 65,000 miles · TX

The contact owns a 2019 Cadillac CT6. The contact received notification of the federal safety agency 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 the recall repair. The manufacturer was not made aware of the failure. The failure mileage was approximately 65,000. Parts distribution disconnect.

Filed Jun 24, 2025 · Transmission · FL

The contact owns a 2019 Cadillac CT6. The contact received notification of the federal safety agency 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.

Filed Jun 9, 2025 · Transmission · 84,000 miles · AL

The contact owns a 2019 Cadillac CT6. The contact received notification of the federal safety agency 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 failure mileage was 84,000. VIN tool confirms parts not available.

Filed Jun 5, 2025 · Transmission · 50,000 miles · IN

The contact owns a 2019 Cadillac CT6. The contact received notification of the federal safety agency 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 driver’s 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 in line at the drive-thru, the column shifter was stuck on neutral(N). After several attempts, the contact was able to move the gear shifter to drive(D). Most recently, the contact stated that upon parking and exiting the vehicle, the vehicle started to roll back 1 to 2 feet. Additionally, the contact engaged the parking brake. No warning lights were illuminated. The vehicle was taken to several dealers, including Schepel Cadillac (2929 W Lincoln Highway, Merrillville, IN 46410). The vehicle was not diagnosed or repaired. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact notified GM's Chief Executive of the failure through email. The failure mileage was approximately 50,000. VIN tool confirms parts not available.

Filed May 28, 2025 · Transmission · TN

The contact owns a 2019 Cadillac CT6. The contact received notification of the federal safety agency 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.

Filed May 13, 2025 · Transmission · LA

The contact owns a 2019 Cadillac CT6. The contact stated while driving approximately 50 MPH, the vehicle was lagging. There were no warning lights illuminated. The contact received notification of the federal safety agency Campaign Number: 25V148000 (Power Train); however, the part to do the recall repair was not yet available. The local dealer was contacted. 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 failure mileage was unknown. VIN tool confirms parts not available.