{"nhtsa_id":634685,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2002-10-04","date":"2005-09-01","document_id":"020604041","mfr_campaign":null,"replaces":"020604041A","component":"FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:FUEL RAIL","mfr_system":null,"summary":"DIAGNOSTIC HINTS / TROUBLESHOOTING GUIDE FOR DENSO COMMON RAIL FUEL SYSTEM FOR CERTAIN MEDIUM DUTY TILT CAB AND COMMERCIAL MODELS. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/634685","components":[{"id":"fuel-system","name":"Fuel system","parent":null},{"id":"fuel-injector","name":"Fuel injection","parent":"fuel-system"}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"T SERIES","year_from":1999,"year_to":2002,"match":"exact","vehicle_ids":["1999_chevrolet_t-series","2000_chevrolet_t-series","2001_chevrolet_t-series","2002_chevrolet_t-series"]},{"make":"GMC","model":"T SERIES","year_from":2000,"year_to":2002,"match":"exact","vehicle_ids":["2000_gmc_t-series","2001_gmc_t-series","2002_gmc_t-series"]},{"make":"ISUZU","model":"FRR","year_from":2000,"year_to":2003,"match":"exact","vehicle_ids":["2000_isuzu_frr","2001_isuzu_frr","2002_isuzu_frr","2003_isuzu_frr"]},{"make":"ISUZU","model":"FSR","year_from":1998,"year_to":2002,"match":null,"vehicle_ids":[]},{"make":"ISUZU","model":"FTR","year_from":1998,"year_to":2002,"match":null,"vehicle_ids":[]},{"make":"ISUZU","model":"FVR","year_from":1998,"year_to":2002,"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":[]}