{"nhtsa_id":10232726,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-03-08","date":"2023-03-07","document_id":"N212336962","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN; UNKNOWN OR OTHER; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE; ELECTRICAL SYSTEM","mfr_system":null,"summary":"Emission Recall. General Motors has decided to conduct a Voluntary Emission Recall involving certain vehicles. The Transmission Control Module (TCM), after detecting a loss of communications fault with other control modules, may incorrectly clear the loss of communications Diagnostic Trouble Codes (DTCs) when the vehicle is keyed off and, if the loss of communications fault persists, may not detect it again when the vehicle is keyed back on. If this were to happen, the transmission could operate in a default mode with no DTC set and the MIL not illuminated. Dealers are to reprogram the Transmission Control Module (TCM) with updated software.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10232726-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10232726-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10232726","components":[{"id":"electrical","name":"Electrical system","parent":null},{"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":"CHEVROLET","model":"CORVETTE","year_from":2020,"year_to":2021,"match":"exact","vehicle_ids":["2020_chevrolet_corvette","2021_chevrolet_corvette"]}],"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":[]}