2006-2012 6.6l Duramax Premium Glow Plug LBZ/lMM/LML Silverado/sierra 2500/3500 2006 - 2012 LLY LBZ LMM and LML Chevy / GMC Duramax Replaces part numbers: 80044 61G GP110 DRX00057 High Thermal Conductivity Superior Electrical Insulation