{"nhtsa_id":627870,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2002-02-25","date":"2001-10-03","document_id":"031001","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN:AUTOMATIC TRANSMISSION","mfr_system":null,"summary":"INFORMATION REGARDING A 1-2 SHIFT SHUTTER, WHICH MAY OCCUR ON LIGHT THROTTLE ACCELERATION, USUALLY WHEN THE VEHICLE IS THOROUGHLY WARMED UP. *YH","document":null,"url":"https://open.wenmarpro.com/bulletins/627870","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"automatic-transmission","name":"Automatic transmission","parent":"powertrain"}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"SILVERADO","year_from":2001,"year_to":2002,"match":"exact","vehicle_ids":["2001_chevrolet_silverado","2002_chevrolet_silverado"]},{"make":"GMC","model":"SIERRA","year_from":2001,"year_to":2002,"match":"exact","vehicle_ids":["2001_gmc_sierra","2002_gmc_sierra"]}],"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":[]}