{"nhtsa_id":620771,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2001-08-29","date":"2001-06-29","document_id":"SB233024","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE","mfr_system":null,"summary":"INFORMATION PERTAINING TO INLET AIR DUCT MAINTENANCE. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/620771","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"CH","year_from":null,"year_to":null,"match":"exact","vehicle_ids":[]},{"make":"MACK","model":"CL","year_from":null,"year_to":null,"match":"exact","vehicle_ids":[]},{"make":"MACK","model":"CX","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]}],"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":[]}