{"product_id":"12639701-diesel-glow-plugs-9g-for-duramax-6-6l-reliable-cold-starts","title":"12639701 Diesel Glow Plugs 9G for Duramax 6.6L - Reliable Cold Starts","description":"\u003cp\u003eIn this review the 12639701 Diesel Glow Plugs 9G are examined for owners of GM 6.6L Duramax trucks from 2006 to 2016 who need a cost-effective replacement set that restores cold-starting and combustion stability. The reviewer found these glow plugs to be a straightforward, highquality aftermarket alternative that fits LBZ, LGH, LLY, LML and LMM engines and ships as an 8-piece kit; the single biggest reason to buy is the proper fit and function on compatible Chevy and GMC heavyduty trucks, which can clear misfire or check engine light issues related to faulty preheat operation.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Direct fit for GM 6.6L V8 Duramax engines used in many Chevy and GMC 2500\/3500 models from 2006 to 2016, reducing the risk of ordering the wrong part.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreheat function:\u003c\/strong\u003e Designed to preheat combustion chambers so diesel engines start faster in cold conditions and maintain reliable ignition across cylinders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelf-regulating design:\u003c\/strong\u003e Controls electrical flow as temperatures rise to prevent overheating and protect the plug and wiring during operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable construction:\u003c\/strong\u003e Manufactured to exceed original equipment performance standards for form and fit to provide a long service life when installed correctly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete kit:\u003c\/strong\u003e Includes eight 12639701 glow plugs so the typical installation for most cylinders is covered in one purchase.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis product is best for owners of Chevy Silverado, GMC Sierra, Chevy Express and GMC Savana trucks equipped with the GM 6.6L Duramax engines (LBZ, LGH, LLY, LML, LMM) from model years 2006 through 2016 who want a like-for-like replacement to restore cold-start and driveability performance.\u003c\/p\u003e\n\u003cp\u003eDrivers who are not comfortable with mechanical work should seek professional installation, since no installation instructions are included and customers reported mixed ease of installation; anyone who needs factory warranty parts or original equipment numbering should verify fitment carefully before purchase or provide a VIN for confirmation.\u003c\/p\u003e\n\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGood fit and function on compatible Duramax engines, often resolving glowplugrelated check engine lights.\u003c\/li\u003e\n\u003cli\u003eSelfregulating design helps prevent overheating of the plug and electrical system during warmup.\u003c\/li\u003e\n\u003cli\u003eComes as an 8piece pack, convenient for replacing multiple cylinders in one job.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInstallation can be fiddly; some customers reported issues with the wire nut connection and recommend careful handling or professional installation.\u003c\/li\u003e\n\u003cli\u003eDurability received mixed feedback in a few reports, including a breakage during removal, so care and correct tools are important.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e12639701 (replaces 97364968)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e8 pieces per package\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine Fit\u003c\/td\u003e\n\u003ctd\u003eGM 6.6L V8 Duramax (LBZ, LGH, LLY, LML, LMM)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle Fit\u003c\/td\u003e\n\u003ctd\u003eChevy Silverado\/Sierra\/Express and GMC Sierra\/Savana 2006-2016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eDiesel glow plug preheat for cold starts and cylinder ignition\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign\u003c\/td\u003e\n\u003ctd\u003eSelf-regulating to control electrical flow and prevent overheating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 12639701 Diesel Glow Plugs 9G are a practical, valueoriented replacement for Duramax owners who need reliable preheat performance and proper fit for 2006-2016 Chevy and GMC 6.6L trucks. They deliver the core benefits of correct ignition and faster cold starts and come as an 8piece kit, but buyers should plan for careful installation or professional service due to some reported wiring and removal issues.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill these glow plugs fit my 2008 Chevy Silverado 2500?\u003c\/strong\u003e\u003cbr\u003eYes, these 9G glow plugs are listed as compatible with 2006-2016 Silverado 2500 HD models with the GM 6.6L Duramax engine; provide your VIN if you need exact confirmation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many plugs are included in the package?\u003c\/strong\u003e\u003cbr\u003eThe package contains eight 12639701 glow plugs, enough to replace most cylinder banks in one job.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs professional installation required?\u003c\/strong\u003e\u003cbr\u003eProfessional installation is recommended because no instructions are included and customers have reported issues with wire nut tightening and occasional breakage during removal.\u003c\/p\u003e","brand":"IVONNEY","offers":[{"title":"Default Title","offer_id":48648720318683,"sku":"B09MJ4RJKG","price":37.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71bhxYgCVtL._AC_SL1500.jpg?v=1778555280","url":"https:\/\/gearmusthave.com\/products\/12639701-diesel-glow-plugs-9g-for-duramax-6-6l-reliable-cold-starts","provider":"GearMustHave","version":"1.0","type":"link"}