{"nhtsa_id":10171240,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-02-10","date":"2019-12-02","document_id":"N192266750-01","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"N192266750-01 - Service Update (Revised Warranty Information and Service Procedure). On certain vehicles that are equipped with a 6.6L diesel engine, may have one or more of the following conditions exist: 1.The instrument panel cluster may incorrectly display the message ?DEF Low? when a diesel engine fluid (DEF) controller internal fault is detected (DTC P20FF), instead of displaying the proper ?Service DEF System? message. 2.The customer may complain of excessive engine fan noise at a low vehicle speed. 3.Under certain conditions, the diagnostic system may set one of the following DTC?s when there is no problem with a component: (P20EE, P226D, P16F3 and P129F). Dealers are to reprogram the engine control module.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2019/MC-10171240-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2019/MC-10171240-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10171240","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"engine","name":"Engine","parent":null},{"id":"instrument-cluster","name":"Instrument cluster","parent":"electrical"}],"codes":["P129F","P16F3","P20EE","P20FF","P226D"],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"SILVERADO 4500","year_from":2020,"year_to":2020,"match":"base","vehicle_ids":["2020_chevrolet_silverado"]},{"make":"GMC","model":"SIERRA 2500","year_from":2020,"year_to":2020,"match":"base","vehicle_ids":["2020_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":[]}