{"product_id":"gm-dmx-l5p-duramax-l5p-fuel-injector-seal-puller-combo-kit","title":"GM Duramax L5P Fuel Injector Seal \u0026 Puller Combo Kit","description":"\u003cdiv class=\"two-column\"\u003e\n\u003cdiv class=\"column-one\"\u003e\n\u003ch3\u003eWhat Is the GM DMX L5P Fuel Injector Seat \u0026amp; Seal Restorer?\u003c\/h3\u003e\n\u003cp\u003eThe ProMAXX Tool GM DMX L5P Fuel Injector and Seal Puller \/ Seat Restorer is a must-have solution for technicians handling GM DMX L5P injector replacement or seal-related issues. This precision-engineered tool restores damaged fuel injector seats by removing carbon buildup and resurfacing the aluminum seat to factory condition—ensuring proper injector fit and sealing during reinstall.\u003c\/p\u003e\n\u003ch4\u003eKey Features \u0026amp; Benefits of the GM DMX L5P Injector Seat Repair Tool\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeeds Up GM L5P Injector Seal Replacement:\u003c\/strong\u003e Clean and refinish each injector seat in as little as 15 seconds, reducing downtime and eliminating repeat repairs caused by poor sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRestores Proper Injector Sealing:\u003c\/strong\u003e A resurfaced seat ensures correct injector compression seal contact, preventing blow-by, fuel leaks, and performance loss.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo Valve Cover Removal Required:\u003c\/strong\u003e Perform injector seat repair directly through the injector bore, saving significant labor time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast ROI for Professional Shops:\u003c\/strong\u003e The tool typically pays for itself after just three injector repairs, excluding injector R\u0026amp;R labor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesigned to Pair with Injector Removal Tools:\u003c\/strong\u003e Ideal when used alongside PowerPull injector removal systems for complete GM L5P injector service.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEssential for High-Volume GM Diesel Repair:\u003c\/strong\u003e Eliminates guesswork and restores seats correctly the first time.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdetails class=\"accordion-item\"\u003e\n\u003csummary class=\"accordion-header\"\u003eCommon GM DMX L5P Injector Seat \u0026amp; Seal Repair Questions:\u003c\/summary\u003e\n\u003cdiv class=\"accordion-content\"\u003e\n\u003cul class=\"product-desc-ul\"\u003e\n\u003cli\u003e\n\u003ch4\u003eWhy do GM L5P injectors fail to seal properly?\u003c\/h4\u003e\nCarbon buildup from high-temperature combustion gases (often exceeding 1100°F) erodes the aluminum injector seat, preventing the compression seal from seating correctly.\u003c\/li\u003e\n\u003cli\u003e\n\u003ch4\u003eCan this tool be used during GM L5P injector replacement?\u003c\/h4\u003e\nYes. It restores the sealing surface before injector installation, ensuring proper seal compression and preventing repeat failures.\u003c\/li\u003e\n\u003cli\u003e\n\u003ch4\u003eDoes this replace wire brushes or seat cleaners?\u003c\/h4\u003e\nYes. Unlike brass brushes, which are softer than aluminum, this tool resurfaces the injector seat to a clean, flat, factory-spec finish.\u003c\/li\u003e\n\u003cli\u003e\n\u003ch4\u003eWhere is the injector seat located on the GM L5P?\u003c\/h4\u003e\nThe injector seat is machined directly into the aluminum cylinder head, beneath the injector bore.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cbr\u003e\n\u003cdetails class=\"accordion-item\"\u003e\n\u003csummary class=\"accordion-header\"\u003eWhat Causes GM DMX L5P Injector Seat Damage?\u003c\/summary\u003e\n\u003cdiv class=\"accordion-content\"\u003e\n\u003cul class=\"product-desc-ul\"\u003e\n\u003cli\u003eGM DMX L5P injector seats are damaged when hot carbon particulates migrate beneath the injector compression seal, pitting the aluminum seat and causing blow-by, injector noise, and power loss.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cbr\u003e\n\u003cdetails class=\"accordion-item\"\u003e\n\u003csummary class=\"accordion-header\"\u003eWhat Makes This Better Than Traditional Cleaning Methods?\u003c\/summary\u003e\n\u003cdiv class=\"accordion-content\"\u003e\n\u003cul class=\"product-desc-ul\"\u003e\n\u003cli\u003eTraditional brass wire brushes cannot properly repair aluminum injector seats. This tool resurfaces the seat, restoring proper geometry and sealing integrity instead of just removing loose debris.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"column-two\"\u003e\n\u003ccenter\u003e\u003c\/center\u003e\n\u003cbr\u003e\u003cbr\u003e\u003ccenter\u003e\n\u003ch5\u003eBEST VALUE – Air Hammer Assisted Injector Puller Included in Combo Kit (PMXRBY320PRO \/ PMXRBY320PROP)\u003c\/h5\u003e\n\u003cp\u003e\u003cem\u003eDisclaimer: The photos show the Ford Power Stroke, but the device’s application and function are identical\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/center\u003e\n\u003cp\u003e\u003cstrong\u003e Maximize efficiency and revenue with the GM DMX L5P Service Combo—combining the PowerPull Injector Puller and Injector Seat Restorer for complete injector service. \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRemoves stuck GM L5P injectors quickly without cylinder head removal\u003c\/li\u003e\n\u003cli\u003eIncludes air hammer-assisted punch for faster injector extraction\u003c\/li\u003e\n\u003cli\u003eDual-function system combines pulling and resurfacing operations\u003c\/li\u003e\n\u003cli\u003eRepairs injector seats to restore proper sealing and engine performance\u003c\/li\u003e\n\u003cli\u003eIdeal for fleet service and high-volume GM diesel repair shops\u003c\/li\u003e\n\u003cli\u003eReduces labor time while increasing shop profitability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdetails class=\"accordion-item\"\u003e\n\u003csummary class=\"accordion-header\"\u003eCall a ProMAXX Tool Specialist at 724-941-0941 if You Still Have Questions Like…\u003c\/summary\u003e\n\u003cdiv class=\"accordion-content\"\u003e\n\u003cul class=\"product-desc-ul\"\u003e\n\u003cli\u003e\n\u003ch4\u003eWhat is the best GM DMX L5P injector seat repair tool?\u003c\/h4\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch4\u003eHow do you fix injector blow-by on a GM L5P?\u003c\/h4\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch4\u003eCan GM L5P injector seats be resurfaced?\u003c\/h4\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch4\u003eHow do you remove carbon from GM L5P injector seats?\u003c\/h4\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch4\u003eWhat causes injector seal failure on GM L5P engines?\u003c\/h4\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ccenter\u003e\u003c\/center\u003e","brand":"ProMAXX Tool","offers":[{"title":"Robby ProKit Plus w\/Injector Puller (PMXRBY320PROP)","offer_id":52005230969106,"sku":"PMXRBY320PROP","price":599.95,"currency_code":"USD","in_stock":true},{"title":"Robby ProKit Seat Repair (PMXRBY320PRO)","offer_id":52005231001874,"sku":"PMXRBY320PRO","price":399.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0752\/6622\/8498\/files\/PMXRBY300PRO-Robby-ProKit-Power-Stroke.jpg?v=1718129015","url":"https:\/\/promaxxtool.com\/products\/gm-dmx-l5p-duramax-l5p-fuel-injector-seal-puller-combo-kit","provider":"ProMAXX Tool","version":"1.0","type":"link"}