{"nhtsa_id":633688,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2002-09-23","date":"2002-05-01","document_id":"020901","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN:AXLE ASSEMBLY","mfr_system":null,"summary":"SUBJECT REGARDING GEARED HUB OUTPUT SEAL KIT. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/633688","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"axle","name":"Axle","parent":"powertrain"}],"codes":[],"topics":[],"vehicles":[{"make":"AM GENERAL","model":"HUMMER","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":[]}