{"nhtsa_id":10079725,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2016-09-12","date":"2016-01-13","document_id":"GCUS-3-401","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN:AUTOMATIC TRANSMISSION","mfr_system":null,"summary":"20710 - CUSTOMER SATISFACTION PROGRAM. VEHICLES EQUIPPED WITH A CONTINUOUSLY VARIABLE RATIO AUTOMATIC TRANSMISSION (CVT) (RPO M4M), MAY HAVE A CONDITION IN WHICH THE DRIVE PULLEY AND BELT COULD BE DAMAGED IF THEY EXPERIENCE AN UNEXPECTED HARSH SHIFT EVENT. DEALERS ARE TO REPROGRAM THE TRANSMISSION CONTROL MODULE (TCM) TO PREVENT DRIVE QUALITY DEGRADATION AND/OR HARSH SHIFTS.","document":null,"url":"https://open.wenmarpro.com/bulletins/10079725","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"automatic-transmission","name":"Automatic transmission","parent":"powertrain"}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"SPARK","year_from":2014,"year_to":2015,"match":"exact","vehicle_ids":["2014_chevrolet_spark","2015_chevrolet_spark"]}],"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":[]}