{"nhtsa_id":606524,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1999-08-26","date":"1999-06-01","document_id":"5499","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM:WIRING:INTERIOR/UNDER DASH","mfr_system":null,"summary":"ON SOME VEHICLES, A PROBLEM WITH THE INSTRUMENTATION CONTROL UNIT KEYPAD CAN OCCUR WHEN REPLACING THE ICU1 UNIT WITH THE ICU2M. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/606524","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"wiring","name":"Wiring and fuses","parent":"electrical"}],"codes":[],"topics":[],"vehicles":[{"make":"FREIGHTLINER","model":"ARGOSY","year_from":null,"year_to":null,"match":"exact","vehicle_ids":[]},{"make":"FREIGHTLINER","model":"CENTURY","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":[]}