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.
