{"nhtsa_id":10244482,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-11-10","date":"2023-10-23","document_id":"23PBJ","mfr_campaign":null,"replaces":null,"component":"SERVICE BRAKES, AIR","mfr_system":null,"summary":"Certain 536, 537, and 548 chassis built with 2.1m Medium Duty End of Frame Trailer Connections may exceed the standard trailer brake release timing requirements by 0.5 seconds due to the size of the tractor protection valve fitting and hose. A delay in the trailer brake release can create instability to the trailer and increase the risk of a crash.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10244482-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10244482-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10244482","components":[{"id":"brakes","name":"Brakes","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"PETERBILT","model":"536","year_from":2020,"year_to":2021,"match":null,"vehicle_ids":[]},{"make":"PETERBILT","model":"536","year_from":2022,"year_to":2024,"match":"exact","vehicle_ids":["2022_peterbilt_536","2023_peterbilt_536","2024_peterbilt_536"]},{"make":"PETERBILT","model":"537","year_from":2020,"year_to":2022,"match":null,"vehicle_ids":[]},{"make":"PETERBILT","model":"537","year_from":2023,"year_to":2024,"match":"exact","vehicle_ids":["2023_peterbilt_537","2024_peterbilt_537"]},{"make":"PETERBILT","model":"548","year_from":2020,"year_to":2023,"match":null,"vehicle_ids":[]},{"make":"PETERBILT","model":"548","year_from":2024,"year_to":2024,"match":"exact","vehicle_ids":["2024_peterbilt_548"]}],"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":[]}