{"nhtsa_id":10089893,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2017-01-30","date":"2015-07-08","document_id":"15114","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM:12V/24V/48V BATTERY:CABLES; ENGINE","mfr_system":null,"summary":"15114 - SPECIAL COVERAGE. ON SOME 2010-2012 MODEL YEAR CHEVROLET SILVERADO HD AND GMC SIERRA HD OR 2011-2012 CHEVROLET EXPRESS AND GMC SIERRA HD VEHICLES EQUIPPED WITH A 6.6L DURAMAX DIESEL ENGINE (RPO LML, LGH) THE MALFUNCTION INDICATOR LAMP (MIL) MAY ILLUMINATE DUE TO A CONDITION WITH THE GLOW PLUGS. WHEN DIAGNOSED, REPLACEMENT OF ONE OF THE ENGINES GLOW PLUGS MAY BE REQUIRED. NO DRIVABILITY ISSUES ARE GENERALLY ASSOCIATED WITH THIS ISSUE, BUT HARDER STARTING IN COLD AMBIENT TEMPERATURES MAY BE NOTED. DEALERS ARE TO REPLACE THE AFFECTED GLOW PLUG.","document":null,"url":"https://open.wenmarpro.com/bulletins/10089893","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"engine","name":"Engine","parent":null},{"id":"battery","name":"12-volt battery","parent":"electrical"}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"EXPRESS","year_from":2010,"year_to":2012,"match":"exact","vehicle_ids":["2010_chevrolet_express","2011_chevrolet_express","2012_chevrolet_express"]},{"make":"CHEVROLET","model":"SILVERADO 1500","year_from":2011,"year_to":2012,"match":"base","vehicle_ids":["2011_chevrolet_silverado","2012_chevrolet_silverado"]},{"make":"CHEVROLET","model":"SILVERADO 2500","year_from":2011,"year_to":2012,"match":"base","vehicle_ids":["2011_chevrolet_silverado","2012_chevrolet_silverado"]},{"make":"CHEVROLET","model":"SILVERADO 3500","year_from":2011,"year_to":2012,"match":"base","vehicle_ids":["2011_chevrolet_silverado","2012_chevrolet_silverado"]},{"make":"GMC","model":"SANANA","year_from":2010,"year_to":2010,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"SAVANA","year_from":2010,"year_to":2012,"match":"exact","vehicle_ids":["2010_gmc_savana","2011_gmc_savana","2012_gmc_savana"]},{"make":"GMC","model":"SIERRA 1500","year_from":2011,"year_to":2012,"match":"base","vehicle_ids":["2011_gmc_sierra","2012_gmc_sierra"]},{"make":"GMC","model":"SIERRA 2500","year_from":2011,"year_to":2012,"match":"base","vehicle_ids":["2011_gmc_sierra","2012_gmc_sierra"]},{"make":"GMC","model":"SIERRA 3500","year_from":2011,"year_to":2012,"match":"base","vehicle_ids":["2011_gmc_sierra","2012_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":[]}