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Year/Make/Model: 2025 Cadillac XT6 AWD Sport Mileage at time of incident: ~12,233  COMPONENT: Service Brakes, Hydraulic / Brake Booster Vacuum Sensor DESCRIPTION OF THE PROBLEM: While driving on a main road 1 mile away from the dealership, the brakes failed without warning. The vehicle was driven directly to the dealership (Les Stanford Cadillac, Dearborn, MI) for emergency inspection. This is the same defect that has now caused brake failure twice in approximately 5,500 miles: a brake booster vacuum sensor failure that previously triggered a brake assist warning and was "repaired" on 10/07/25 at 6,747 miles, then recurred and was "repaired" again on 05/29/26 at 12,233 miles. Both repairs replaced the brake booster vacuum sensor assembly, performed by the same dealership and same technician, yet the underlying defect has continued to recur. This is a serious safety defect that creates an unreasonable risk of loss of braking ability while driving, with potential for a crash, injury, or death to the driver, passengers, or other motorists.  WHEN DID THE PROBLEM FIRST OCCUR: Originally October 2025; recurred June 2026 with loss of brakes on a main road.   WHAT WAS THE OUTCOME: Vehicle driven directly to dealer for inspection following loss of brake function 1 mile away.

CADILLAC XT6 2025 SERVICE BRAKES

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 2024â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)

CADILLAC XT6 2025 ENGINE

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 2024â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)

CADILLAC XT6 2025 ELECTRICAL SYSTEM

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.

I was backing up into a parking space in a parking garage.  I was about halfway into the spot and was not in danger of hitting any vehicles or objects and my vehicle abruptly (extremely hard) braked.

CADILLAC XT6 2025 FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

2025 Cadillac XT6 AWD — vehicle data sourced from FuelEconomy.gov.

The 2025 Cadillac XT6 AWD offers a spacious SUV experience with its 5-door body and comfortable interior, powered by a robust 3.6L V6 engine. Enjoy confident all-weather capability with its All-Wheel Drive system and a smooth 9-speed automatic transmission.

	2020	2021	2022	2023	2024	2025
Price	—	—	—	$48,995	$49,990–$65,690	$49,990
Engine Capacity	3.6L	3.6L	2L	2L	3.6L	3.6L
Fuel Type	Regular	Regular	Premium	Premium	Regular	Regular
Transmission	Automatic (S9)	Automatic (S9)	Automatic (S9)	Automatic (S9)	Automatic (S9)	9 speed automatic
Body Type	Small Sport Utility Vehicle 4WD	Small Sport Utility Vehicle 4WD	Small Sport Utility Vehicle 4WD	Small Sport Utility Vehicle 4WD	Small Sport Utility Vehicle 4WD	SUV

Cadillac XT6 AWD (2025) Specifications