{"nhtsa_id":634678,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2002-10-04","date":"2002-05-01","document_id":"020846005","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM:IGNITION:MODULE","mfr_system":null,"summary":"SUBJECT REGARDNG THE ADDITION OF DIAGNOSTIC TROUBLE CODE U1500 FOR GENERATION 4 ONSTAR. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/634678","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"ignition","name":"Ignition","parent":"electrical"}],"codes":["U1500"],"topics":[],"vehicles":[{"make":"BUICK","model":"CENTURY","year_from":2002,"year_to":2002,"match":"exact","vehicle_ids":["2002_buick_century"]},{"make":"BUICK","model":"LESABRE","year_from":2002,"year_to":2002,"match":"exact","vehicle_ids":["2002_buick_lesabre"]},{"make":"BUICK","model":"REGAL","year_from":2002,"year_to":2002,"match":"exact","vehicle_ids":["2002_buick_regal"]},{"make":"CADILLAC","model":"DEVILLE","year_from":2002,"year_to":2002,"match":"exact","vehicle_ids":["2002_cadillac_deville"]},{"make":"CADILLAC","model":"SEVILLE","year_from":2002,"year_to":2002,"match":"exact","vehicle_ids":["2002_cadillac_seville"]},{"make":"CHEVROLET","model":"IMPALA","year_from":2002,"year_to":2002,"match":"exact","vehicle_ids":["2002_chevrolet_impala"]},{"make":"CHEVROLET","model":"MONTE CARLO","year_from":2002,"year_to":2002,"match":"exact","vehicle_ids":["2002_chevrolet_monte-carlo"]},{"make":"CHEVROLET","model":"TRAILBLAZER","year_from":2002,"year_to":2002,"match":"exact","vehicle_ids":["2002_chevrolet_trailblazer"]},{"make":"GMC","model":"ENVOY","year_from":2002,"year_to":2002,"match":"exact","vehicle_ids":["2002_gmc_envoy"]},{"make":"OLDSMOBILE","model":"AURORA","year_from":2002,"year_to":2002,"match":"exact","vehicle_ids":["2002_oldsmobile_aurora"]},{"make":"OLDSMOBILE","model":"BRAVADA","year_from":2002,"year_to":2002,"match":"exact","vehicle_ids":["2002_oldsmobile_bravada"]},{"make":"OLDSMOBILE","model":"INTRIGUE","year_from":2002,"year_to":2002,"match":"exact","vehicle_ids":["2002_oldsmobile_intrigue"]},{"make":"PONTIAC","model":"BONNEVILLE","year_from":2002,"year_to":2002,"match":"exact","vehicle_ids":["2002_pontiac_bonneville"]}],"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":[]}