Cadillac CTS Problems by year

created an immediate safety hazard because I was unable to maintain control of the vehicle's speed or bring it to a safe stop. As a result, the vehicle struck utility power equipment near my residence. The incident placed me, nearby residents, pedestrians, and motorists at risk of injury. The collision also caused a power outage affecting homes in the surrounding neighborhood. At this time, the cause of the engine and brake failure has not been reproduced or confirmed by a Cadillac dealer or independent repair facility. The matter remains under investigation pending inspection of the vehicle and its components. The incident was reported to 911, and a police report was generated. The vehicle has been reported to my insurance carrier, USAA. As of the date of this statement, the vehicle has not yet been inspected by General Motors or a Cadillac dealer for purposes of determining the cause of the failure. Additional inspections may be conducted by insurance representatives, repair specialists, or other qualified parties. Prior to the incident, I did not observe any warning lamps, brake system alerts, engine warnings, or other messages that would have indicated an imminent loss of braking capability or engine failure. The failure occurred suddenly on October 30, 2026, at approximately 3:10 PM. The vehicle had recently undergone a 120,000-mile service inspection, and no issues were identified that would have suggested an imminent catastrophic failure.

exertion to slow the vehicle and drastically extending the emergency stopping distance.Repair History & Manufacturer Involvement: The primary brake vacuum pump was initially replaced by an authorized Cadillac dealership in July 2023. Following that service, the "Brake Assist" warning lamp remained persistently illuminated. I called the dealership to ask how I can reset the warning and no one called me back, so I just lived with it. After driving only approximately 5,000 miles over 3 years, the system completely failed again, causing the second aforementioned on-road moving brake failures.The vehicle was towed back to the authorized Cadillac dealership on June 29, 2026, and has remained continuously out of service in their possession for nearly four months (113+ days) as of late October 2026. Dealership technicians have hit a diagnostic wall. They have repeatedly replaced parts, brake vacuum pump, vacuum sensor hose, brake booster twice during this single visit, and the brake master cylinder. Despite these component replacements, diagnostic fault codes remain active, check engine and brake warning lights remain illuminated, and power braking function cannot be reliably restored.The failure is so severe that the dealership has opened two concurrent General Motors Technical Assistance Center (TAC) cases, and a corporate GM Field Engineer was deployed to inspect the car, which recommended to replace master cylinder on 09/22/2026, no contact since, no loaner.

the dealer to be diagnose regarding the roaring sound coming from the rear of the vehicle. The dealer determined that the rear differential was leaking due to a pinion bearing failure and needed to be replaced. The contact associated the failures with NHTSA Campaign Numbers: 20V038000 (Power Train) and 26V329000 (Air Bags). The failure mileage was approximately 143,145.