General Motors (NYSE: GM) is recalling more than 2019-2020 Cadillac CT6, 2020-2021 CT4 and CT5, and 2020-2022 model year Chevrolet Camaro vehicles equipped with a 10-speed transmission. The transmission may become damaged internally cause the wheels to lock-up. Drivers may notice harsh shifting.
“A transmission control valve in some of these vehicles may be susceptible to excess wear over time, resulting in a gradual loss of pressure within the valve that can cause harsh shifting. In rare cases, the wheels may experience a momentary lock up,” GM said in the mandatory safety defect recall filing made public this morning by the National Highway Traffic Safety Administration.
“Excessive wear within the transmission control valve body can cause a fluid leak leading to a pressure drop that causes certain valves to move unexpectedly,” GM said.
Chronology
- On 27 September 2024, a GM brand quality manager submitted a report to GM’s Speak Up for Safety (SUFS) program following notification by a driver of a 2021 Cadillac CT5 who reported that both front tires locked up while driving. Following the lock-up, the vehicle went into “neutral.” Due to damage, the vehicle was towed and the damaged engine and front differential were subsequently replaced. GM previously investigated this condition and determined that, in some applications, excessive wear in a control valve in these transmissions was causing harsh downshifting and, in rare cases, a momentary (<150 ms) lock up of the wheels. Prior testing and analysis indicated this lockup was not sufficient to cause a loss of vehicle control, and, at that time, GM identified no reports of accidents or injuries associated with the condition.
- GM opened a new investigation into this defect on 21 November 2024.
- GM’s investigator completed an analysis of a comprehensive field data search on 18 December 2024, which identified 115 field reports alleging a lock-up potentially related to this defect, including one alleged accident. GM received these reports between February 17, 2022 and November 12, 2024.
- On 27 February 2025, GM’s Safety Field Action Decision Authority (SFADA) decided to conduct a safety recall.
Dealers will install transmission control module monitoring software, free of charge as required by US Safety legislation. Owner notification letters are not expected to be mailed until 21 April 2025. Owners may contact Cadillac customer service at 1-800-333-4223 or Chevrolet customer service at 1-800-222-1020. GM’s number for this recall is N242480630.
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 888-327-4236 or go to nhtsa.gov about NHTSA recall 25V148 or 25V-148.
About Ken Zino
Ken Zino, publisher (kzhw@aol.com), is a versatile auto industry participant with global experience spanning decades in print and broadcast journalism, as well as social media. He has automobile testing, marketing, public relations and communications experience. He is past president of The International Motor Press Assn, the Detroit Press Club, founding member and first President of the Automotive Press Assn. He is a member of APA, IMPA and the Midwest Automotive Press Assn.
Zino is at home on test tracks, knows his way around U.S. Congressional hearing rooms, auto company headquarters, plant floors, as well as industry research and development labs where the real mobility work is done. He can quote from court decisions, refer to instrumented road tests, analyze financial results, and profile executive personalities and corporate cultures.
He also brings an historical perspective while citing their contemporary relevance of the work of legendary auto writers such as Ken Purdy, Jim Dunne or Jerry Flint, or writers such as Red Smith, Mark Twain, Thomas Jefferson – all to bring perspective to a chaotic automotive universe.
Above all, decades after he first drove a car, Zino still revels in the sound of the exhaust as the throttle is blipped and the driver’s rush that occurs when the entry, apex and exit points of a turn are smoothly and swiftly crossed. It’s the beginning of a perfect lap.
AutoInformed has an editorial philosophy that loves transportation machines of all kinds while promoting critical thinking about the future use of cars and trucks.
Zino builds AutoInformed from his background in automotive journalism starting at Hearst Publishing in New York City on Motor and MotorTech Magazines and car testing where he reviewed hundreds of vehicles in his decade-long stint as the Detroit Bureau Chief of Road & Track magazine. Zino has also worked in Europe, and Asia – now the largest automotive market in the world with China at its center.
Wheel Lockup Recalls on Cadillacs and Camaros
General Motors (NYSE: GM) is recalling more than 2019-2020 Cadillac CT6, 2020-2021 CT4 and CT5, and 2020-2022 model year Chevrolet Camaro vehicles equipped with a 10-speed transmission. The transmission may become damaged internally cause the wheels to lock-up. Drivers may notice harsh shifting.
“A transmission control valve in some of these vehicles may be susceptible to excess wear over time, resulting in a gradual loss of pressure within the valve that can cause harsh shifting. In rare cases, the wheels may experience a momentary lock up,” GM said in the mandatory safety defect recall filing made public this morning by the National Highway Traffic Safety Administration.
“Excessive wear within the transmission control valve body can cause a fluid leak leading to a pressure drop that causes certain valves to move unexpectedly,” GM said.
Chronology
Dealers will install transmission control module monitoring software, free of charge as required by US Safety legislation. Owner notification letters are not expected to be mailed until 21 April 2025. Owners may contact Cadillac customer service at 1-800-333-4223 or Chevrolet customer service at 1-800-222-1020. GM’s number for this recall is N242480630.
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 888-327-4236 or go to nhtsa.gov about NHTSA recall 25V148 or 25V-148.
About Ken Zino
Ken Zino, publisher (kzhw@aol.com), is a versatile auto industry participant with global experience spanning decades in print and broadcast journalism, as well as social media. He has automobile testing, marketing, public relations and communications experience. He is past president of The International Motor Press Assn, the Detroit Press Club, founding member and first President of the Automotive Press Assn. He is a member of APA, IMPA and the Midwest Automotive Press Assn. Zino is at home on test tracks, knows his way around U.S. Congressional hearing rooms, auto company headquarters, plant floors, as well as industry research and development labs where the real mobility work is done. He can quote from court decisions, refer to instrumented road tests, analyze financial results, and profile executive personalities and corporate cultures. He also brings an historical perspective while citing their contemporary relevance of the work of legendary auto writers such as Ken Purdy, Jim Dunne or Jerry Flint, or writers such as Red Smith, Mark Twain, Thomas Jefferson – all to bring perspective to a chaotic automotive universe. Above all, decades after he first drove a car, Zino still revels in the sound of the exhaust as the throttle is blipped and the driver’s rush that occurs when the entry, apex and exit points of a turn are smoothly and swiftly crossed. It’s the beginning of a perfect lap. AutoInformed has an editorial philosophy that loves transportation machines of all kinds while promoting critical thinking about the future use of cars and trucks. Zino builds AutoInformed from his background in automotive journalism starting at Hearst Publishing in New York City on Motor and MotorTech Magazines and car testing where he reviewed hundreds of vehicles in his decade-long stint as the Detroit Bureau Chief of Road & Track magazine. Zino has also worked in Europe, and Asia – now the largest automotive market in the world with China at its center.