{"nhtsa_id":10001912,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2003-07-25","date":"2003-03-12","document_id":"031203","mfr_campaign":null,"replaces":null,"component":"SUSPENSION:REAR:SPRINGS:AIR SUSPENSION SYSTEM","mfr_system":null,"summary":"AUTOMATIC LEVELING FEATURE OF THE REAR SUSPENSION IS NOT FUNCTIONING WITH POSSIBLE DIAGNOSTIC TROUBLE CODE U1000 SET. *TT *JB","document":null,"url":"https://open.wenmarpro.com/bulletins/10001912","components":[{"id":"suspension","name":"Suspension","parent":null},{"id":"air-suspension","name":"Air suspension","parent":"suspension"}],"codes":["U1000"],"topics":[],"vehicles":[{"make":"HUMMER","model":"H2","year_from":2003,"year_to":2003,"match":"exact","vehicle_ids":["2003_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":[]}