{"nhtsa_id":10055688,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2014-07-03","date":"2014-04-01","document_id":"SIB-4-11-14","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)","mfr_system":null,"summary":"DETROIT: DATA IS ERRATIC; THE CLUTCH POSITION SENSOR, DUE TO TRANSMISSION CONTROL MODULE (TCM) HAVING FAULTS SPN 520971/7, 521491/2 SET. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10055688","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"automatic-transmission","name":"Automatic transmission","parent":"powertrain"},{"id":"transmission-control-module","name":"Transmission control module","parent":"powertrain"}],"codes":[],"topics":[],"vehicles":[{"make":"DETROIT DIESEL","model":"DETROIT","year_from":null,"year_to":null,"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":[]}