The LLY engine uses a glow plug system with a control module operated by the glow plug control module (GPCM). The GPCM connects to each of the eight glow plugs individually.

Some units of the 2020 GMC Sierra 1500 pickup truck motivated by the 3.0L LM2 turbo-diesel Duramax engine may have a faulty cylinder 2 glow plug that can cause issues, according to a special ...

GM has issued a special coverage bulletin for certain 2020 Chevy Silverado 1500 units that may have a fault cylinder 2 glow plug in their Duramax diesel engine.