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.

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.

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 ...