2001-2004 GM 6.6L DURAMAX LB7 -GM 97209343 GLOW PLUG RAIL 2001-2004 GM 6.6L DURAMAX LB7 The GM 97209343 Glow Plug Rail for your 2001-2004 GM 6.6L Duramax LB7 is a common failure item. On the federal emission LB7 engines, the glow plugs are connected by the glow plug rail which looks like a thin bracket... MSRP: Was: Now: $45.85 Add to Cart The item has been added