Cadillac XT6 Problems — All Years, Common Issues & Reliability

My Cadillac has experienced a history of repeated mechanical/electrical issues and has spent extended periods of time out of service at the dealership for repairs. On today’s date, while driving at normal roadway speed, the vehicle suddenly lost all power without warning, creating a dangerous safety situation. The vehicle became extremely difficult to control and lost normal drivability functions while in traffic. I was fortunately able to safely maneuver the vehicle to a stop without a collision or injury. Due to the complete loss of power and unsafe operating condition, the vehicle had to be towed. I will get it to the dealership when they open again for business on Monday. Given the repeated repair history and this most recent dangerous failure while driving, I no longer believe the vehicle is safe or reliable to operate. I am requesting investigation of this safety-related defect and have initiated a formal buyback review request with General Motors/Cadillac.

2025 CADILLAC XT6 AWD SPORT, VIN [XXX] , PURCHASED NEW FROM CENTRAL [XXX] CADILLAC ON FEBRUARY 20, 2026 WITH 3,950 MILES. WITHIN APPROXIMATELY TWO MONTHS OF DELIVERY THE VEHICLE DEVELOPED AN ABNORMAL ENGINE NOISE AT COLD START AND AN INTERMITTENT VIBRATION DURING DRIVING. I REPORTED BOTH SYMPTOMS TO CENTRAL HOUSTON CADILLAC BY PHONE AND TEXT MESSAGE. DEALER PERSONNEL TOLD ME THE NOISE WAS "NORMAL" AND THAT "ALL CADILLAC/GM VEHICLES HAVE THAT ISSUE." BASED ON THAT ASSURANCE I CONTINUED TO DRIVE THE VEHICLE AS FAMILY TRANSPORTATION, INCLUDING WITH MY MINOR CHILDREN ONBOARD, ONE OF WHOM IS A SPECIAL-NEEDS CHILD. IN APRIL 2026, APPROXIMATELY TWO MONTHS AFTER PURCHASE, I BROUGHT THE VEHICLE TO CENTRAL HOUSTON CADILLAC FOR AN UNRELATED CONCERN. AT THAT VISIT THE DEALER DIAGNOSED A CATASTROPHIC INTERNAL ENGINE DEFECT AND ADVISED THAT COMPLETE ENGINE REPLACEMENT IS REQUIRED. THE VEHICLE IS CURRENTLY OUT OF SERVICE FOR APPROXIMATELY 30 DAYS WHILE THE ENGINE IS REPLACED UNDER WARRANTY. A CATASTROPHIC ENGINE FAILURE IN A NEARLY-NEW VEHICLE CREATES A SUBSTANTIAL RISK OF SUDDEN LOSS OF POWER, STALLING, LOSS OF CONTROL, OR UNDERHOOD FIRE. THE DEALER'S INITIAL MISCHARACTERIZATION OF THE WARNING SYMPTOM (COLD-START KNOCK) AS "NORMAL" IS PARTICULARLY CONCERNING AND SUGGESTS A POTENTIAL PATTERN ACROSS 2024–2025 CADILLAC XT6 VEHICLES THAT NHTSA SHOULD INVESTIGATE. NO CRASH HAS OCCURRED. NO INJURIES HAVE OCCURRED. NO FIRE HAS OCCURRED. HOWEVER, THE VEHICLE WAS OPERATED WITH CHILDREN ONBOARD AFTER THE DEFECT BEGAN MANIFESTING AND BEFORE THE DEALER PROPERLY DIAGNOSED IT. I AM FILING THIS COMPLAINT SO NHTSA CAN EVALUATE WHETHER A PATTERN EXISTS IN THIS ENGINE AND TO ENSURE THE DEFECTIVE ENGINE REMOVED FROM MY VEHICLE IS PRESERVED FOR POTENTIAL INVESTIGATION. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

2025 CADILLAC XT6 AWD SPORT, VIN [XXX] , PURCHASED NEW FROM [XXX] [XXX] ON FEBRUARY 20, 2026. THE VEHICLE'S AUDIO SYSTEM INTERMITTENTLY ACTIVATES ALL SPEAKERS WITHOUT COMMAND WHILE THE VEHICLE IS IN MOTION. THE CONDITION OCCURS UNPREDICTABLY AND PRODUCES A SUDDEN LOUD AUDIO EVENT INSIDE THE CABIN THAT STARTLES THE DRIVER AND CREATES A DRIVER- DISTRACTION HAZARD. THE VEHICLE HAS ALSO DEVELOPED A PERSISTENT DASHBOARD RATTLE, WHICH MAY OR MAY NOT BE RELATED TO THE SAME UNDERLYING BODY- CONTROL-MODULE OR WIRING ISSUE. I HAVE REPORTED THESE CONDITIONS TO CENTRAL [XXX] . THE VEHICLE IS CURRENTLY OUT OF SERVICE FOR AN UNRELATED CATASTROPHIC ENGINE FAILURE (SEE COMPANION NHTSA COMPLAINT FILED BY THIS CONSUMER). I AM FILING THIS COMPLAINT SO NHTSA CAN EVALUATE WHETHER OTHER 2024–2026 CADILLAC XT6 VEHICLES HAVE EXPERIENCED THE SAME UNCOMMANDED AUDIO ACTIVATION AND WHETHER THE CONDITION WARRANTS INVESTIGATION. NO CRASH HAS OCCURRED. NO INJURIES HAVE OCCURRED. THE RISK IS DRIVER DISTRACTION FROM AN UNEXPECTED LOUD AUDIO EVENT WHILE THE VEHICLE IS IN MOTION. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

6700 miles on 2025 XT6 had an oil change a month ago. Noted red fluid leaking on driveway on 02-10-26. Immediately notified dealer. Brought car to Camargo Cadillac 9876 Montgomery Rd Cinti OH 513-402-2905. Brought car in 9:15 am 02-11-26 was informed at 10:00 am that the car is experiencing faulty transmission bolts and it will require lengthy repair including "dropping transmission to reach bolts." I have seen numerous complaints online with the same issue yet there is no recall at this time.

The vehicle has experienced repeated fuel system failures. The fuel pump control module (FPCM) is a known General Motors issue on similar vehicles, but this specific vehicle was not included in a recall. The vehicle now displays diagnostic trouble code P2635 – Fuel Pump Flow Performance. The engine hesitates and loses power during acceleration, especially under load or when the vehicle is warm. Prior to this code, the vehicle repeatedly reported fuel injector-related faults. Four fuel injectors have already failed and required replacement, causing significant financial loss. Based on diagnosis, the injector failures appear to be secondary damage caused by improper fuel control from the fuel pump control module. This condition creates a potential safety risk due to unexpected hesitation and reduced engine power while driving. The issue appears to be related to a systemic electronic fuel control problem rather than normal wear.

After driving for couple of hours Car Jump like a horse while driving and slow moving since purchased.

Transmission slipping and won’t go in reverse

The rear camera blanks out when backing out of driveway into the sun. It prevents me from seeing cross traffic and pedestrians. The dealer looked at the system and said it something I had to live with. This seems to be an intermittent problem, as sometimes it suddenly starts to work, or when I back into the street over the curb gutter. If I back the vehicle into the garage and drive out into the sun, the front camera is not affected by the sun. I feel this is a safety hazard to pedestrians and other vehicles. The dealer seems very indifferent to the problem

The car stops abruptly in reverse for no apparent reason when backing up

dash board panel buckels in the heat of california part 84900142 & 84900137

am experiencing multiple issues with my 2024 Cadillac XT6 that affect drivability and potentially safety: 1.Intermittent Transmission Shift Jerk •The vehicle occasionally exhibits a sudden “jerk” or abrupt shift while accelerating, mostly in 2nd–3rd or 3rd–4th gear. •The issue is intermittent and cannot be consistently reproduced during dealer visits. •The dealer has performed two transmission fluid flushes within one month, but the problem continues. •No diagnostic trouble codes are stored, making it difficult for the dealer to duplicate, but the jerks are noticeable and concerning while driving. 2.Startup and Engine/Transmission Noise •Upon starting the vehicle, I hear unusual noises described as [whining •Noise is also sometimes heard during idle or even briefly after the vehicle is turned off. •These noises occur intermittently, sometimes during cold start or light driving, and may indicate an underlying transmission, engine, or accessory issue.

The thermostat sensor is defaulty. While driving all of the dashboard component lights flash on and off and the vehicle loses power while driving. Called the dealership and the technician knew exactly what it was because he said this is a known issue and when I got the vehicle to the dealership they didn't need to do a diagnostic, they knew exactly what it was. A recall should have happened to avoid this.