12639701 Glow Plugs 9G Compatible with 6.6 Duramax Chevy GMC LBZ LLY LML LMM LGH. Compatible with GMC: 2006-2016 Sierra 2500 HD, 2007 Sierra 2500 HD Classic/3500 Classic, 2006 Sierra 3500, 2007-2016 Sierra 3500 HD, 2006-2016 Savana 2500/3500.
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