{"product_id":"12678992-genuine-gm-high-pressure-diesel-fuel-injector-for-silverado-sierra-6-6l","title":"12678992 Genuine GM High Pressure Diesel Fuel Injector For Silverado Sierra 6.6L","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\n\u003cp\u003eThe 12678992 is a genuine GM high pressure diesel fuel injector intended for select 2017–2023 Chevrolet Silverado HD and GMC Sierra HD models equipped with the 6.6L V8 Duramax diesel engine. It delivers finely controlled fuel injection into the cylinders while operating within the pressures of the factory common rail system to support proper combustion and engine efficiency.\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\u003e12678992\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 12678992 high pressure diesel fuel injector is built to match factory performance and installation requirements:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMeters fuel with the precision required for the 6.6L Duramax common rail injection system\u003c\/li\u003e\n\u003cli\u003eEngineered to match the original connector design and injector sealing surfaces\u003c\/li\u003e\n\u003cli\u003eDesigned to operate under the high fuel pressures used in compatible diesel applications\u003c\/li\u003e\n\u003cli\u003eHelps maintain smooth idle quality, balanced fuel delivery, and efficient combustion\u003c\/li\u003e\n\u003cli\u003eManufactured to GM engineering standards for dependable performance in heavy-duty truck service\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eApplication Notes\u003c\/h2\u003e\n\u003cp class=\"PDq2pG_selectionAnchorContainer\"\u003eThe 12678992 is designed for select 2017–2023 Chevrolet Silverado HD and GMC Sierra HD trucks equipped with the 6.6L Duramax diesel engine. Before installation, inspect the injector seat, fuel rail connections, and surrounding components to ensure the fuel system is clean and ready for service.\u003c\/p\u003e\n\u003cblockquote\u003e\n\u003cp class=\"PDq2pG_selectionAnchorContainer\"\u003eVerify the part number, VIN, engine configuration, and injector application before installation.\u003c\/p\u003e\n\u003c\/blockquote\u003e","brand":"GM","offers":[{"title":"Default Title","offer_id":49499020230883,"sku":"12678992","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\/12678992-genuine-gm-high-pressure-diesel-fuel-injector-for-silverado-sierra-6-6l","provider":"Unit Auto Parts","version":"1.0","type":"link"}