{"nhtsa_id":10207991,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-02-14","date":"2018-12-11","document_id":"N18219538001","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN; ELECTRICAL SYSTEM","mfr_system":null,"summary":"Service Update. Certain vehicles equipped with a 10-speed transmission may have a condition where the downshift becomes firm after extended highway driving. Recalibrate the transmission control module (TCM).","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2018/MC-10207991-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2018/MC-10207991-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10207991","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"SILVERADO 1500","year_from":2019,"year_to":2019,"match":"base","vehicle_ids":["2019_chevrolet_silverado"]},{"make":"GMC","model":"SIERRA 1500","year_from":2019,"year_to":2019,"match":"base","vehicle_ids":["2019_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":[]}