{"nhtsa_id":634571,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2002-10-03","date":"2002-05-01","document_id":"020846008","mfr_campaign":null,"replaces":null,"component":"UNKNOWN OR OTHER","mfr_system":null,"summary":"INFORMATION REGARDING THE ON-STAR MODULE COVER RETAINING TAB BREAKING. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/634571","components":[],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"TRAILBLAZER","year_from":2002,"year_to":2003,"match":"exact","vehicle_ids":["2002_chevrolet_trailblazer","2003_chevrolet_trailblazer"]},{"make":"GMC","model":"ENVOY","year_from":2002,"year_to":2003,"match":"exact","vehicle_ids":["2002_gmc_envoy","2003_gmc_envoy"]},{"make":"OLDSMOBILE","model":"BRAVADA","year_from":2002,"year_to":2003,"match":"exact","vehicle_ids":["2002_oldsmobile_bravada","2003_oldsmobile_bravada"]}],"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":[]}