{"nhtsa_id":10004255,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2003-11-24","date":"2004-01-01","document_id":"01446A","mfr_campaign":null,"replaces":"01446C","component":"POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE)","mfr_system":null,"summary":"SERVICE 4WD LIGHT ON NO CODES BESIDES U1000 CODES. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10004255","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"transfer-case","name":"Transfer case","parent":"powertrain"}],"codes":["U1000"],"topics":[],"vehicles":[{"make":"BUICK","model":"RAINIER","year_from":2004,"year_to":2004,"match":"exact","vehicle_ids":["2004_buick_rainier"]},{"make":"CHEVROLET","model":"TRAILBLAZER","year_from":2003,"year_to":2004,"match":"exact","vehicle_ids":["2003_chevrolet_trailblazer","2004_chevrolet_trailblazer"]},{"make":"GMC","model":"ENVOY","year_from":2003,"year_to":2004,"match":"exact","vehicle_ids":["2003_gmc_envoy","2004_gmc_envoy"]},{"make":"OLDSMOBILE","model":"BRAVADA","year_from":2003,"year_to":2004,"match":"exact","vehicle_ids":["2003_oldsmobile_bravada","2004_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":[]}