{"nhtsa_id":10156921,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2019-04-08","date":"2019-03-11","document_id":"PIT5648C","mfr_campaign":null,"replaces":null,"component":"TRAILER HITCHES; ELECTRICAL SYSTEM","mfr_system":null,"summary":"This Preliminary information communicates an issue with a \"Trailer Disconnected Check Connection\" message being displayed on the DIC without a trailer ever being connected. Engineering has released updated software calibrations for the Trailer Lighting Control Module.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2019/MC-10156921-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2019/MC-10156921-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10156921","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"trailer-hitch","name":"Trailer hitch","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":[]}