{"nhtsa_id":10201946,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-10-05","date":"2021-09-07","document_id":"21 PBJ","mfr_campaign":null,"replaces":null,"component":"EXTERIOR LIGHTING; POWER TRAIN","mfr_system":null,"summary":"Safety Recall – Hill Start Assist (HSA) Valve Clearance – NHTSA ID: 21V-648, TC: 2021-521. Crossmember mounted Hill Start Assist valve may not have sufficient clearance to the rear axle, resulting in hose or fitting damage. Damage could cause the loss of rear brake signal, resulting in reduced braking capability and increasing the risk of a crash.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10201946-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10201946-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10201946","components":[{"id":"lighting","name":"Lighting","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"PETERBILT","model":"367","year_from":2020,"year_to":2021,"match":"exact","vehicle_ids":["2020_peterbilt_367","2021_peterbilt_367"]},{"make":"PETERBILT","model":"389","year_from":2020,"year_to":2021,"match":"exact","vehicle_ids":["2020_peterbilt_389","2021_peterbilt_389"]},{"make":"PETERBILT","model":"567","year_from":2020,"year_to":2021,"match":"exact","vehicle_ids":["2020_peterbilt_567","2021_peterbilt_567"]},{"make":"PETERBILT","model":"579","year_from":2020,"year_to":2021,"match":"exact","vehicle_ids":["2020_peterbilt_579","2021_peterbilt_579"]}],"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":[]}