{"nhtsa_id":10012181,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2005-02-17","date":"2006-01-01","document_id":"040421002","mfr_campaign":null,"replaces":"040421002A","component":"POWER TRAIN:AUTOMATIC TRANSMISSION","mfr_system":null,"summary":"NOISE AND BUMP CLUNK FELT WHEN TRANSFER CASE SHIFTED INTO FOUR LOW. *EH","document":null,"url":"https://open.wenmarpro.com/bulletins/10012181","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"automatic-transmission","name":"Automatic transmission","parent":"powertrain"}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"COLORADO","year_from":2004,"year_to":2006,"match":"exact","vehicle_ids":["2004_chevrolet_colorado","2005_chevrolet_colorado","2006_chevrolet_colorado"]},{"make":"GMC","model":"CANYON","year_from":2004,"year_to":2006,"match":"exact","vehicle_ids":["2004_gmc_canyon","2005_gmc_canyon","2006_gmc_canyon"]}],"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":[]}