{"product_id":"12686812-genuine-gm-high-pressure-diesel-fuel-injector-for-silverado-sierra-6-6l","title":"12686812 Genuine GM High Pressure Diesel Fuel Injector For Silverado Sierra 6.6L","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\n\u003cp\u003eThe 12686812 is a genuine GM high pressure diesel fuel injector designed for select 2017–2023 Chevrolet Silverado HD and GMC Sierra HD models powered by the 6.6L V8 Duramax diesel engine. It supplies accurately metered fuel to the combustion chamber through the factory common rail system, supporting efficient combustion, stable engine operation, and consistent fuel delivery.\u003c\/p\u003e\n\u003ch2\u003eVehicle Compatibility\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; height: 500px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003cth style=\"width: 8.27338%; text-align: center; height: 19.6px;\"\u003e\u003cstrong\u003eYear\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth style=\"width: 26.7184%; text-align: center; height: 19.6px;\"\u003e\u003cstrong\u003eVehicle\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth style=\"width: 21.3032%; text-align: center; height: 19.6px;\"\u003e\u003cstrong\u003eEngine\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth style=\"width: 42.8058%; text-align: center; height: 19.6px;\"\u003e\u003cstrong\u003eTrims\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2023\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eChevrolet Silverado 2500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eCustom, High Country, LT, LTZ, WT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2023\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eChevrolet Silverado 3500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eHigh Country, LT, LTZ, WT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2023\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eGMC Sierra 2500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eAT4, Denali, Pro, SLE, SLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2023\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eGMC Sierra 3500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eAT4, Denali, Pro, SLE, SLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2022\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eChevrolet Silverado 2500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eCustom, High Country, LT, LTZ, WT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2022\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eChevrolet Silverado 3500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eHigh Country, LT, LTZ, WT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2022\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eGMC Sierra 2500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eAT4, Denali, Pro, SLE, SLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2022\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eGMC Sierra 3500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eAT4, Denali, Pro, SLE, SLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2021\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eChevrolet Silverado 2500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eCustom, High Country, LT, LTZ, WT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2021\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eChevrolet Silverado 3500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eHigh Country, LT, LTZ, WT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2021\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eGMC Sierra 2500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eAT4, Base, Denali, SLE, SLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2021\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eGMC Sierra 3500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eAT4, Base, Denali, SLE, SLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2020\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eChevrolet Silverado 2500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eHigh Country, LT, LTZ, WT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2020\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eChevrolet Silverado 3500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eHigh Country, LT, LTZ, WT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2020\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eGMC Sierra 2500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eAT4, Base, Denali, SLE, SLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2020\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eGMC Sierra 3500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eAT4, Base, Denali, SLE, SLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2019\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eChevrolet Silverado 2500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.0L V8 CNG, 6.0L V8 Flex, 6.0L V8 Gas, 6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eHigh Country, LT, LTZ, WT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2019\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eChevrolet Silverado 3500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.0L V8 CNG, 6.0L V8 Flex, 6.0L V8 Gas, 6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eHigh Country, LT, LTZ, WT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2019\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eGMC Sierra 2500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.0L V8 CNG, 6.0L V8 Flex, 6.0L V8 Gas, 6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eBase, Denali, SLE, SLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2019\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eGMC Sierra 3500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.0L V8 CNG, 6.0L V8 Flex, 6.0L V8 Gas, 6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eBase, Denali, SLE, SLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2018\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eChevrolet Silverado 2500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.0L V8 CNG, 6.0L V8 Flex, 6.0L V8 Gas, 6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eHigh Country, LT, LTZ, WT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2018\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eChevrolet Silverado 3500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.0L V8 Flex, 6.0L V8 Gas, 6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eHigh Country, LT, LTZ, WT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2018\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eGMC Sierra 2500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.0L V8 Flex, 6.0L V8 Gas, 6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eBase, Denali, SLE, SLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2018\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eGMC Sierra 3500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.0L V8 Flex, 6.0L V8 Gas, 6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eBase, Denali, SLE, SLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2017\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eChevrolet Silverado 2500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.0L V8 Flex, 6.0L V8 Gas, 6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eHigh Country, LT, LTZ, WT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2017\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eChevrolet Silverado 3500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.0L V8 Flex, 6.0L V8 Gas, 6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eHigh Country, LT, LTZ, WT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2017\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eGMC Sierra 2500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.0L V8 Flex, 6.0L V8 Gas, 6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eBase, Denali, SLE, SLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 8.27338%;\"\u003e2017\u003c\/td\u003e\n\u003ctd style=\"width: 26.7184%;\"\u003eGMC Sierra 3500 HD\u003c\/td\u003e\n\u003ctd style=\"width: 21.3032%;\"\u003e6.0L V8 Flex, 6.0L V8 Gas, 6.6L V8 Diesel\u003c\/td\u003e\n\u003ctd style=\"width: 42.8058%;\"\u003eBase, Denali, SLE, SLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003eGeneral Specifications\u003c\/h2\u003e\n\u003cdiv style=\"width: 100%; display: block;\"\u003e\n\u003ctable class=\"product-table\" style=\"height: 235.2px; width: 100% !important; table-layout: fixed !important; display: table !important;\"\u003e\n\u003ccolgroup\u003e \u003ccol style=\"width: 27.1583%;\"\u003e \u003ccol style=\"width: 72.482%;\"\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12686812\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHigh Pressure Diesel Fuel Injector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eYears\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2017–2023\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVehicle\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eChevrolet Silverado 2500 HD, Silverado 3500 HD, GMC Sierra 2500 HD, GMC Sierra 3500 HD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6.6L V8 Diesel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8.9 × 3.8 × 3.4 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.25 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFitment Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDirect Replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003eProduct Features\u003c\/h2\u003e\n\u003cp\u003eThe 12686812 high pressure diesel fuel injector is built to match factory performance and installation requirements:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEngineered to deliver precise fuel injection under the operating pressures of the Duramax common rail system\u003c\/li\u003e\n\u003cli\u003eManufactured with factory-style sealing surfaces and electrical connections for proper fitment\u003c\/li\u003e\n\u003cli\u003eDesigned to provide consistent fuel atomization across a wide range of engine operating conditions\u003c\/li\u003e\n\u003cli\u003eSupports smooth engine performance by maintaining accurate fuel delivery to each cylinder\u003c\/li\u003e\n\u003cli\u003eBuilt to GM engineering specifications for dependable operation in heavy-duty diesel applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eApplication Notes\u003c\/h2\u003e\n\u003cp class=\"PDq2pG_selectionAnchorContainer\"\u003eThe 12686812 is intended for select Chevrolet Silverado HD and GMC Sierra HD trucks equipped with the 6.6L Duramax diesel engine. Before installing the injector, inspect the injector bore, fuel rail, and high-pressure connections to ensure the fuel system is clean and ready for installation.\u003c\/p\u003e\n\u003cblockquote\u003e\n\u003cp class=\"PDq2pG_selectionAnchorContainer\"\u003eAlways verify the part number, vehicle VIN, engine configuration, and fuel system application before installation.\u003c\/p\u003e\n\u003c\/blockquote\u003e","brand":"GM","offers":[{"title":"Default Title","offer_id":49499024982243,"sku":"12686812","price":399.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0769\/5122\/4547\/files\/s-l1600_73.webp?v=1785845346","url":"https:\/\/unitautoparts.com\/products\/12686812-genuine-gm-high-pressure-diesel-fuel-injector-for-silverado-sierra-6-6l","provider":"Unit Auto Parts","version":"1.0","type":"link"}