{"product_id":"gm-genuine-parts-68g-glow-plug-12690238-for-diesel-engines-cold-start-heat","title":"GM Genuine Parts 68G Glow Plug (12690238) for Diesel Engines | Cold Start Heat","description":"\u003cp\u003eGM Genuine Parts 68G Glow Plug (12690238) is designed to deliver targeted heat when diesel engines need it most during cold starts. It uses a GN type regulating coil and a self regulating design to manage electrical flow as temperatures rise, helping to prevent overheating and reduce wear on electrical systems.\u003c\/p\u003e\n\u003cp\u003eThis OE grade part is engineered, tested, and backed by General Motors, with compatibility considerations across Chevrolet, Buick, GMC and Cadillac vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment OE, reflecting a history of GM engineering excellence and ongoing innovation to meet modern materials and technologies.\u003c\/p\u003e\n\u003ch2\u003eHow it works\u003c\/h2\u003e\n\u003cp\u003eThe GN type regulating coil maintains steady heat output for reliable cold starts. The self regulating feature adjusts current draw as the engine warms, supporting stable operation and potentially lowering battery strain in challenging conditions.\u003c\/p\u003e\n\u003cp\u003eDesigned for robust performance, this glow plug is built to suit a wide range of chamber requirements, ensuring the right fit for many GM engines while respecting OE design intent.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eHeat rich design aimed at diesel cold starts\u003c\/li\u003e\n  \u003cli\u003eGN type regulating coil for consistent heat output\u003c\/li\u003e\n  \u003cli\u003eSelf regulating to control electrical flow as temperatures rise\u003c\/li\u003e\n  \u003cli\u003eFull reach range from 21 mm to 40 mm to fit multiple chamber sizes\u003c\/li\u003e\n  \u003cli\u003eOE grade reliability backed by GM\u003c\/li\u003e\n  \u003cli\u003eGM engineers design and validate OE parts for Chevrolet, Buick, GMC and Cadillac\u003c\/li\u003e\n  \u003cli\u003eRegular design updates incorporate new materials and technologies\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility and quality\u003c\/h3\u003e\n\u003cp\u003eGM Genuine Parts are designed, engineered and tested to rigorous standards and are backed by General Motors. This 68G glow plug supports OEM fit and function, helping you maintain authentic GM performance for diesel cold starts and consistent operation across seasons.\u003c\/p\u003e\n\u003ch3\u003eReal world use and benefits\u003c\/h3\u003e\n\u003cp\u003eIn cold climates or with engines that sit idle for periods, rapid heating of the combustion chamber can improve starting reliability. The 68G glow plug may help support quicker warm ups, smoother engine start sequences, and steady electrical behavior under varying temperatures, all while aligning with GM’s OE design philosophy.\u003c\/p\u003e\n\u003ch2\u003eWhy choose GM Genuine Parts\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eOE fit and function for GM vehicles\u003c\/li\u003e\n  \u003cli\u003eRigorous engineering and testing backed by GM\u003c\/li\u003e\n  \u003cli\u003eOngoing updates to materials and production designs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen selecting parts for your Chevrolet, Buick, GMC or Cadillac, GM Genuine Parts offer an authentic option built to the brand’s standards. Always verify compatibility with your specific engine model and follow service manual guidance for replacement and installation.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What is the GM Genuine Parts 68G Glow Plug designed for?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It provides heat for diesel cold starts and self-regulates electrical flow to avoid overheating as temperatures rise.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the 68G glow plug compatible with GM models?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Designed for many GM models; verify fit with your engine's chamber reach (21–40 mm).\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"GM GENUINE PARTS","offers":[{"title":"Default Title","offer_id":42470734200917,"sku":"B0842WSRXM","price":48.7,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/3270\/4597\/files\/gm-genuine-parts-68g-glow-plug-closeup.jpg?v=1778146766","url":"https:\/\/plentytorque.co.uk\/products\/gm-genuine-parts-68g-glow-plug-12690238-for-diesel-engines-cold-start-heat","provider":"PlentyTorque","version":"1.0","type":"link"}