{"nhtsa_id":621773,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2001-10-01","date":"2001-03-01","document_id":"101201","mfr_campaign":null,"replaces":null,"component":"UNKNOWN OR OTHER","mfr_system":null,"summary":"INFORMATION REGARDING DIAGNOSTIC TROUBLE CODES (DTC'S) P1641 AND P1654 ON MODEL YEAR 2001 WITH VIN 192555 AND EARLIER. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/621773","components":[],"codes":["P1641","P1654"],"topics":[],"vehicles":[{"make":"AM GENERAL","model":"HUMMER","year_from":2001,"year_to":2001,"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":[]}