{"nhtsa_id":613941,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2000-09-21","date":"2000-06-01","document_id":"000503","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN:MANUAL TRANSMISSION","mfr_system":null,"summary":"SOME VEHICLE OWNERS MAY REPORT A LOSS OF TRANSMISSION FLUID WITH NO VISIBLE SIGNS OF LEAKAGE. ALSO THERE MAY BE TRANSMISSION FLUID IN THE GEARED HUBS OR AIR CLEANER HOUSING, A TRANSMISSION FLUID LEAK IN THE AREA OF THE TRANSFER CASE SEALS WITH NO APPARENT DAMAGE TO THE SEAL, OR THE TRANSFER CASE FLUID LEVEL SIGNIFICANTLY OVER FULL WHEN CHECKED ON MODELS WITH VIN 188385 AND BELOW AND WITH TRANSFER CASES BUILT PRIOR TO FEBRUARY 4, 2000. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/613941","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"manual-transmission","name":"Manual transmission","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":[]}