This system consists of a Glow Plug Control Relay (GPC) for 49 state or Glow Plug Control Module (GPCM) on 1999 and newer California emissions vehicles, 8 glow plugs, a “wait to start” light, related ...

General Motors' LBZ Duramax Engine is one of the most reliable engines ever built. Over the years, the LBZ and other Duramax engines have carved out a reputation for durability, reliability, and long ...