{"product_id":"gm-genuine-parts-fuel-tank-filler-cap-gt359-22921366-yellow-e85-rubber-gasket-locking-option","title":"GM GENUINE PARTS Fuel Tank Filler Cap GT359 (22921366) Yellow E85, Rubber Gasket, Locking Option","description":"\u003cp\u003e\u003cstrong\u003eGM Genuine Parts GT359 (22921366) is an original-equipment E85 yellow fuel tank filler cap designed to seal the fuel filler neck, keep contaminants out, and clearly identify FlexFuel vehicles.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis replacement fuel tank filler cap is produced to GM factory specifications for fit, function, and durability. It includes a rubber gasket for a liquid-tight seal that prevents fuel evaporation, water infiltration, and debris entry. The bright yellow color signals E85 compatibility to owners and service technicians, and the cap is offered in locking and non-locking versions to match your vehicle’s security features.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this cap protect my vehicle’s fuel system?\u003c\/h3\u003e\n\u003cp\u003eThe GM Genuine Parts GT359 cap forms a snug, threaded seal at the filler neck to reduce vapor loss and keep contaminants out. The integrated rubber gasket maintains a reliable liquid- and vapor-tight barrier under normal driving conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThreaded design for consistent engagement with the filler neck\u003c\/li\u003e\n  \u003cli\u003eRubber gasket prevents leaks and blocks dirt, water, and debris\u003c\/li\u003e\n  \u003cli\u003eReduces fuel evaporation and helps maintain system pressure\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy is the yellow color important for E85 vehicles?\u003c\/h3\u003e\n\u003cp\u003eThe bright yellow cap visually indicates E85 (flex-fuel) compatibility so users and service personnel can quickly identify the correct fuel type. This reduces the chance of misfuelling and helps preserve engine and emissions system integrity.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh-visibility color marks FlexFuel capability at a glance\u003c\/li\u003e\n  \u003cli\u003eHelpful for drivers, gas station attendants, and technicians\u003c\/li\u003e\n  \u003cli\u003eMatches GM’s recommended specification for E85-equipped models\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan I choose a locking or non-locking version, and when should I pick locking?\u003c\/h3\u003e\n\u003cp\u003eThe GT359 is available in both locking and non-locking configurations. Choose the locking cap if you need extra theft protection or if your original cap used a key; select the non-locking version for standard replacement when no key system is required.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLocking option adds a keyed security feature for fuel access\u003c\/li\u003e\n  \u003cli\u003eNon-locking option provides a direct, simple replacement fit\u003c\/li\u003e\n  \u003cli\u003eBoth versions are manufactured to GM’s original equipment standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this cap fit my GM vehicle and how does it compare to aftermarket parts?\u003c\/h3\u003e\n\u003cp\u003eThe GT359 is produced as a GM Genuine Parts component and engineered to match factory tolerances and materials. That ensures the same fit and expected service life as the original cap, providing a more reliable seal than many generic aftermarket alternatives.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFactory-style fit to original GM filler neck dimensions\u003c\/li\u003e\n  \u003cli\u003eMaterials and gasket designed to meet GM performance requirements\u003c\/li\u003e\n  \u003cli\u003eRecommended by GM as a direct replacement for compatible models\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Owners and technicians of GM FlexFuel vehicles seeking a direct OEM replacement fuel filler cap that clearly indicates E85 compatibility. It’s ideal for drivers who prefer factory-fit parts, need a locking option for security, or want to prevent fuel vapor loss and contamination with a purpose-built GM component.\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: Is the GT359 fuel cap compatible with E85 fuel?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The GT359 is the yellow E85-designated cap produced for FlexFuel GM models to indicate E85 compatibility.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this cap come with a locking option?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The GT359 is available in both locking and non-locking versions to match your vehicle’s original configuration.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"GM GENUINE PARTS","offers":[{"title":"Default Title","offer_id":48086129180830,"sku":"B00S0LITBI","price":47.63,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/gm-gt359-fuel-cap-front-view.jpg?v=1785885869","url":"https:\/\/northtrailauto.ca\/products\/gm-genuine-parts-fuel-tank-filler-cap-gt359-22921366-yellow-e85-rubber-gasket-locking-option","provider":"North Trail Auto","version":"1.0","type":"link"}