Description Glow Plug Relay for 2001 – 2004 GM 6.6L Duramax LB7 Diesel Dorman # 904-413 An essential replacement item, Dorman’s Diesel Glow Plug Relay properly heats the vehicle’s glow plugs, ensuring that your diesel engine starts smoothly and reliably in cold weather. The relay is engineered from high-quality materials for long-lasting durability. Designed for Federal Emissions LB7 engines only. RPO Code NF2. Replacement restores the diesel glow plug power system to original operation Direct replacement for a proper fit Easy-to-install Plug and play repair solution – no programming necessary Reference # 97371491 / HDC911
