{"nhtsa_id":10217071,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-08-04","date":"2022-07-22","document_id":"PB_567","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE; ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"To improve customer experiences by eliminating most needs for an engineering review, this service bulletin clarifies the upgrade procedure from PMA300 to PMA500 governors. Two options are given. The first option applies only to vehicles that do not have a PUC pump and are upgrading from a PMA300 to a PMA500 governor. The second option can be used for any kind vehicle that is upgrading from the PMA300 to the PMA500 governor.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10217071-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10217071-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10217071","components":[{"id":"engine","name":"Engine","parent":null},{"id":"engine-control-module","name":"Engine control module","parent":"engine"}],"codes":[],"topics":[],"vehicles":[{"make":"PIERCE","model":"CUSTOM CHASSIS","year_from":1998,"year_to":2006,"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":[]}