{"nhtsa_id":10004204,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2003-11-22","date":"2003-11-18","document_id":"01400","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER","mfr_system":null,"summary":"6.6L DURAMAX LB7 ENGINES WITH TURBOCHARGER SYSTEM WHINE NOISE. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10004204","components":[{"id":"engine","name":"Engine","parent":null},{"id":"turbocharger","name":"Turbocharger or supercharger","parent":"engine"}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"SILVERADO","year_from":2004,"year_to":2004,"match":"exact","vehicle_ids":["2004_chevrolet_silverado"]},{"make":"GMC","model":"SIERRA","year_from":2004,"year_to":2004,"match":"exact","vehicle_ids":["2004_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":[]}