{"nhtsa_id":11015824,"type":"service_campaign","type_name":"Service campaign","date_added":"2025-03-21","date":"2025-03-21","document_id":"N242480630","mfr_campaign":null,"replaces":null,"component":"UNKNOWN OR OTHER","mfr_system":null,"summary":"General Motors has decided that a defect which relates to motor vehicle safety may exist in certain: 2019 – 2020 model year Cadillac CT6, 2020 – 2021 model year Cadillac CT4 and CT5, and 2020 – 2022 model year Chevrolet Camaro vehicles equipped with a 10-speed transmission. 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. If the wheels lock-up momentarily while driving, there is increased risk of a crash. Dealers will install new transmission control module software that will monitor valve performance and detect excess wear approximately 10,000 miles (16,000 km) before a wheel lock up condition could occur. Once detected, the transmission will be limited to fifth gear, preventing the possibility of a wheel lock up condition, which occurs in a downshift from eighth gear. A service engine light and reduced propulsion message will also display in the instrument panel.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11015824-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11015824-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11015824","components":[],"codes":[],"topics":[],"vehicles":[{"make":"CADILLAC","model":"CT6","year_from":2019,"year_to":2020,"match":"exact","vehicle_ids":["2019_cadillac_ct6","2020_cadillac_ct6"]},{"make":"CHEVROLET","model":"CAMARO","year_from":2020,"year_to":2022,"match":"exact","vehicle_ids":["2020_chevrolet_camaro","2021_chevrolet_camaro","2022_chevrolet_camaro"]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}