{"nhtsa_id":10024634,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2008-05-01","date":"2008-03-01","document_id":"PIT4550","mfr_campaign":null,"replaces":"PIT4550A","component":"POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)","mfr_system":null,"summary":"LOSS OF HIGH SPEED LAN COMMUNICATIONS. *NJ","document":null,"url":"https://open.wenmarpro.com/bulletins/10024634","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"automatic-transmission","name":"Automatic transmission","parent":"powertrain"},{"id":"transmission-control-module","name":"Transmission control module","parent":"powertrain"}],"codes":[],"topics":[],"vehicles":[{"make":"HUMMER","model":"H2","year_from":2008,"year_to":2008,"match":"exact","vehicle_ids":["2008_hummer_h2"]}],"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":[]}