{"nhtsa_id":10012696,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2005-03-11","date":"2004-02-01","document_id":"040419001","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN:AXLE ASSEMBLY","mfr_system":null,"summary":"DIAGNOSTIC TROUBLE CODE (DTC) C0379 SET, SERVICE 4WD LIGHT ON, 4WD INOPERATIVE. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10012696","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"axle","name":"Axle","parent":"powertrain"}],"codes":["C0379"],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"TRAILBLAZER","year_from":2004,"year_to":2004,"match":"exact","vehicle_ids":["2004_chevrolet_trailblazer"]},{"make":"CHEVROLET","model":"TRAILBLAZER EXT","year_from":2004,"year_to":2004,"match":"base","vehicle_ids":["2004_chevrolet_trailblazer"]},{"make":"GMC","model":"ENVOY","year_from":2004,"year_to":2004,"match":"exact","vehicle_ids":["2004_gmc_envoy"]},{"make":"GMC","model":"ENVOY XL","year_from":2004,"year_to":2004,"match":"base","vehicle_ids":["2004_gmc_envoy"]},{"make":"GMC","model":"ENVOY XUV","year_from":2004,"year_to":2004,"match":"base","vehicle_ids":["2004_gmc_envoy"]}],"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":[]}