{"nhtsa_id":11029798,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-03-06","date":"2026-02-11","document_id":"PB_738","mfr_campaign":null,"replaces":null,"component":"UNKNOWN OR OTHER","mfr_system":null,"summary":"Pierce has implemented two updates to the MCC HVAC system to improve cab air flow and defrost functionality: • Improved windshield defrost vents for MCC HVAC system as a product enhancement • Implemented improved side recirculatory fans for MCC HVAC system as an optional upgrade","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11029798-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11029798-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11029798","components":[],"codes":[],"topics":[],"vehicles":[{"make":"PIERCE","model":"ENFORCER","year_from":2002,"year_to":2025,"match":null,"vehicle_ids":[]},{"make":"PIERCE","model":"IMPEL","year_from":2002,"year_to":2025,"match":null,"vehicle_ids":[]},{"make":"PIERCE","model":"SABER","year_from":2003,"year_to":2025,"match":null,"vehicle_ids":[]},{"make":"PIERCE","model":"VELOCITY","year_from":2002,"year_to":2025,"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":[]}