{"nhtsa_id":11038568,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-10-17","date":"2026-10-07","document_id":"26PACF","mfr_campaign":null,"replaces":null,"component":"SERVICE BRAKES","mfr_system":null,"summary":"Certain Model 548 chassis equipped with tri-drive brake piping are non-compliant with Federal MotorVehicle Safety Standard (FMVSS) 121 / Canadian Motor Vehicle Safety Standard (CMVSS) 121 rearservice brake application, rear service brake release, and trailer gladhand application times. A vehiclethat does not meet these brake timing requirements could present an increased risk of a crash or injury.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11038568-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11038568-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11038568","components":[{"id":"brakes","name":"Brakes","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"PETERBILT","model":"548","year_from":2027,"year_to":2027,"match":"exact","vehicle_ids":["2027_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":[]}