{"nhtsa_id":10135135,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-05-07","date":"2017-11-01","document_id":"17419 (Bulletin","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING; POWER TRAIN","mfr_system":null,"summary":"17419-Service Update. Certain vehicles, equipped with 6.6L diesel engine (RPO L5P) and Allison transmission (RPO MW7), may have a condition in which the automatic transmission has rough upshifts. Dealers will reprogram the transmission control module (TCM).","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2017/MC-10135135-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2017/MC-10135135-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10135135","components":[{"id":"engine","name":"Engine","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"SILVERADO 2500","year_from":2018,"year_to":2018,"match":"base","vehicle_ids":["2018_chevrolet_silverado"]},{"make":"GMC","model":"SIERRA DENALI","year_from":2018,"year_to":2018,"match":"base","vehicle_ids":["2018_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":[]}