{"product_id":"gm-genuine-parts-gt139l-locking-fuel-tank-cap-oem-replacement-25060147","title":"GM Genuine Parts GT139L Locking Fuel Tank Cap – OEM Replacement 25060147","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThe GM Genuine Parts GT139L locking fuel cap is a genuine GM original equipment replacement designed to seal your vehicle's fuel filler and safeguard the tank environment. A durable rubber gasket creates a liquid-tight seal to help keep fuel contained while keeping water and dirt out. Some variants include a check-valve to balance air flow with pressure changes inside the tank, contributing to steady fueling behavior.\u003c\/p\u003e\n\u003ch3\u003eLocking security and durable design\u003c\/h3\u003e\n\u003cp\u003eThe built-in lock adds a practical layer of theft deterrence, while the cap’s construction is built to withstand regular use and exposure to engine bay conditions. As an OEM-grade part, it is designed to mirror the performance and service life you expect from General Motors.\u003c\/p\u003e\n\u003ch3\u003eKey benefits\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eVehicle-specific fit that aligns with GM vehicle designs for reliable operation\u003c\/li\u003e\n  \u003cli\u003eRubber gasket delivers a liquid-tight seal to help prevent leaks and ingress\u003c\/li\u003e\n  \u003cli\u003eCheck-valve option (where included) aids pressure balance during fueling and venting\u003c\/li\u003e\n  \u003cli\u003eLocking mechanism provides theft deterrence while maintaining easy access when needed\u003c\/li\u003e\n  \u003cli\u003eDurable materials and GM engineering optimize long-term performance in varying conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePractical notes for daily use\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eEasy replacement that complies with GM factory standards\u003c\/li\u003e\n  \u003cli\u003eOEM-recommended part supports consistent fuel system behavior\u003c\/li\u003e\n  \u003cli\u003eCompact, vehicle-specific design fits under most filler hatches without modification\u003c\/li\u003e\n  \u003cli\u003eBacked by the GM Genuine Parts heritage of quality and availability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen you install this cap, you choose a component designed to perform like the original. It is intended to complement the vehicle’s fuel system integrity and does not alter other functions. Consider this cap as a thoughtful upgrade or replacement option for GM owners seeking reliable, OEM-grade parts.\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 GT139L locking fuel cap used for?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: To seal the fuel tank and add a lock to deter theft while matching GM's OEM design.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this cap fit my GM vehicle?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It is vehicle-specific and GM-recommended for compatible GM models.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"GM GENUINE PARTS","offers":[{"title":"Default Title","offer_id":42470208405589,"sku":"B000C9STDY","price":50.66,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/3270\/4597\/files\/gm-genuine-parts-gt139l-locking-fuel-cap-closeup.jpg?v=1778123803","url":"https:\/\/plentytorque.co.uk\/products\/gm-genuine-parts-gt139l-locking-fuel-tank-cap-oem-replacement-25060147","provider":"PlentyTorque","version":"1.0","type":"link"}