{"product_id":"gm-duramax-l5p-fuel-injector-seal-puller-combo-kit","title":"GM Duramax L5P Fuel Injector Seal \u0026 Puller Combo Kit","description":"\u003cp class=\"MsoNormal\"\u003eHigh combustion chamber temperatures and compression force hot carbon particulates beneath the injector compression seal, creating crater-like damage in the cylinder head seat. This leads to blow-by, reduced engine power, and declining fuel efficiency. Remove the injector and restore the seat fast—engineered for speed and precision on GM DMX L5P diesel engines.\u003c\/p\u003e\n\u003cul style=\"margin-top: 0in;\" type=\"disc\"\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l0 level1 lfo1; tab-stops: list .5in;\"\u003eFits GM DMX L5P diesel engines for injector seat and seal repair\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l0 level1 lfo1; tab-stops: list .5in;\"\u003eRestores injector cylinder head seat in just 15 seconds—no valve cover removal required\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l0 level1 lfo1; tab-stops: list .5in;\"\u003ePrevents leaks and performance loss with a clean, factory-spec sealing surface\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l0 level1 lfo1; tab-stops: list .5in;\"\u003eOptional combo kit includes PowerPull tool for fast, damage-free injector removal\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l0 level1 lfo1; tab-stops: list .5in;\"\u003eIdeal for busy repair shops looking to cut downtime and increase revenue\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\"\u003ePatent Number: 12,460,606 B2\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eWhat Is the GM DMX L5P Fuel Injector Seat \u0026amp; Seal Restorer?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\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\u003cp class=\"MsoNormal\"\u003eCommon GM DMX L5P Injector Seat \u0026amp; Seal Repair Questions:\u003c\/p\u003e\n\u003cul style=\"margin-top: 0in;\" type=\"disc\"\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l0 level1 lfo1; tab-stops: list .5in;\"\u003e\u003cb\u003eWhy do GM L5P injectors fail to seal properly?\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\"\u003eCarbon buildup from high-temperature combustion gases (often exceeding 1100°F) erodes the aluminum injector seat, preventing the compression seal from seating correctly.\u003c\/p\u003e\n\u003cul style=\"margin-top: 0in;\" type=\"disc\"\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l0 level1 lfo1; tab-stops: list .5in;\"\u003e\u003cb\u003eCan this tool be used during GM L5P injector replacement?\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\"\u003eYes. It restores the sealing surface before injector installation, ensuring proper seal compression and preventing repeat failures.\u003c\/p\u003e\n\u003cul style=\"margin-top: 0in;\" type=\"disc\"\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l0 level1 lfo1; tab-stops: list .5in;\"\u003e\u003cb\u003eDoes this replace wire brushes or seat cleaners?\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\"\u003eYes. Unlike brass brushes, which are softer than aluminum, this tool resurfaces the injector seat to a clean, flat, factory-spec finish.\u003c\/p\u003e\n\u003cul style=\"margin-top: 0in;\" type=\"disc\"\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l0 level1 lfo1; tab-stops: list .5in;\"\u003e\u003cb\u003eWhere is the injector seat located on the GM L5P?\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\"\u003eThe injector seat is machined directly into the aluminum cylinder head, beneath the injector bore.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cbr\u003eWhat Causes GM DMX L5P Injector Seat Damage?\u003c\/p\u003e\n\u003cul style=\"margin-top: 0in;\" type=\"disc\"\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l2 level1 lfo2; tab-stops: list .5in;\"\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\u003cp class=\"MsoNormal\"\u003e\u003cbr\u003eWhat Makes This Better Than Traditional Cleaning Methods?\u003c\/p\u003e\n\u003cul style=\"margin-top: 0in;\" type=\"disc\"\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l4 level1 lfo3; tab-stops: list .5in;\"\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\u003cp class=\"MsoNormal\" style=\"text-align: center;\"\u003e\u003cb\u003eBEST VALUE – Air Hammer Assisted Injector Puller Included in Combo Kit (PMXRBY320PRO \/ PMXRBY320PROP)\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eMaximize efficiency and revenue with the GM DMX L5P Service Combo—combining the PowerPull Injector Puller and Injector Seat Restorer for complete injector service.\u003c\/b\u003e\u003c\/p\u003e\n\u003cul style=\"margin-top: 0in;\" type=\"disc\"\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l1 level1 lfo4; tab-stops: list .5in;\"\u003eRemoves stuck GM L5P injectors quickly without cylinder head removal\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l1 level1 lfo4; tab-stops: list .5in;\"\u003eIncludes air hammer-assisted punch for faster injector extraction\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l1 level1 lfo4; tab-stops: list .5in;\"\u003eDual-function system combines pulling and resurfacing operations\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l1 level1 lfo4; tab-stops: list .5in;\"\u003eRepairs injector seats to restore proper sealing and engine performance\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l1 level1 lfo4; tab-stops: list .5in;\"\u003eIdeal for fleet service and high-volume GM diesel repair shops\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l1 level1 lfo4; tab-stops: list .5in;\"\u003eReduces labor time while increasing shop profitability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\"\u003eCall a ProMAXX Tool Specialist at 724-941-0941 if You Still Have Questions Like…\u003c\/p\u003e\n\u003cul style=\"margin-top: 0in;\" type=\"disc\"\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l3 level1 lfo5; tab-stops: list .5in;\"\u003e\u003cb\u003eWhat is the best GM DMX L5P injector seat repair tool?\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l3 level1 lfo5; tab-stops: list .5in;\"\u003e\u003cb\u003eHow do you fix injector blow-by on a GM L5P?\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l3 level1 lfo5; tab-stops: list .5in;\"\u003e\u003cb\u003eCan GM L5P injector seats be resurfaced?\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l3 level1 lfo5; tab-stops: list .5in;\"\u003e\u003cb\u003eHow do you remove carbon from GM L5P injector seats?\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l3 level1 lfo5; tab-stops: list .5in;\"\u003e\u003cb\u003eWhat causes injector seal failure on GM L5P engines?\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\"\u003e \u003c\/p\u003e","brand":"ProMAXX Tool","offers":[{"title":"Robby ProKit Plus w\/Injector Puller (PMXRBY320PROP)","offer_id":52266475979074,"sku":"PMXRBY320PROP","price":599.95,"currency_code":"USD","in_stock":true},{"title":"Robby ProKit Seat Repair (PMXRBY320PRO)","offer_id":52266476011842,"sku":"PMXRBY320PRO","price":399.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/3541\/7922\/files\/PMXRBY300PRO-Robby-ProKit-Power-Stroke.webp?v=1780943068","url":"https:\/\/miltonindustries.com\/products\/gm-duramax-l5p-fuel-injector-seal-puller-combo-kit","provider":"Milton® Industries Inc.","version":"1.0","type":"link"}