{"nhtsa_id":10012113,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2005-02-14","date":"2004-07-01","document_id":"030730060","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN:AUTOMATIC TRANSMISSION","mfr_system":null,"summary":"AUTOMATIC TRANSMISSION OIL COOLER FLUSHING AND FLOW TESTING. THIS SERVICE BULLETIN REPLACES 030730060. THIS INCLUDES 1999-2005 CHEVORLET, GMC, W SERIES MEDIUM DUTY TILT CAB, ISUZU W SERIES COMMERCIAL MODELS WITH 4HE1 OR 4HK1 DIESEL ENGINE AND AISIN A450-43LE AUTO TRANSMISSION OR 5.7 OR 6.0 GAS ENGINE (VINS R, U - RPOS L31 LQ40) AND 4L80-E AUTOMATIC TRANSMISSION. *EH","document":null,"url":"https://open.wenmarpro.com/bulletins/10012113","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"automatic-transmission","name":"Automatic transmission","parent":"powertrain"}],"codes":[],"topics":[],"vehicles":[{"make":"UNKNOWN","model":"UNKNOWN","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":[]}