{"nhtsa_id":52559,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1997-08-14","date":"1997-06-01","document_id":"777162","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN:AUTOMATIC TRANSMISSION","mfr_system":null,"summary":"UNDESIRED UPSHIFT OR DOWNSHIFDT BETWEEN SECOND AND THIRD GEAR WHEN MANUALLY SHIFTED TO FIRST GEAR (NEW CALIBRATION). *TW","document":null,"url":"https://open.wenmarpro.com/bulletins/52559","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"automatic-transmission","name":"Automatic transmission","parent":"powertrain"}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"P SERIES","year_from":1997,"year_to":1997,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"P SERIES","year_from":1997,"year_to":1997,"match":null,"vehicle_ids":[]}],"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":[]}