DURAMAX FUEL FILTER HEAD REBUILD KIT 6-PIECE SEAL KIT + BILLET BLEEDER SCREW

iFJF part No.: FJ-SL6AD4-CK. Duramax Fuel Filter Head Rebuild Kit Stop Leaks & Hard Starts The iFJF Duramax Fuel Filter Head Rebuild Kit fixes the most common fuel system issues on 2001-2013 GM Duramax 6.6L diesel trucks (LB7, LLY, LBZ, LMM) fuel leaks, air intrusion, and a primer pump that won't hold pressure . This 6-piece Viton seal kit replaces every wearable seal and O-ring in your filter head, plus includes a CNC-machined billet aluminum bleeder screw to replace the notoriously failure-prone OEM plastic screw. Save $200+ compared to replacing the entire filter housing at the dealer. Over time, the rubber seals in the Duramax filter head harden, shrink, and crack from heat cycling and diesel exposure. When seals fail, air enters the fuel system causing extended cranking on cold starts, rough idle, and stalling under load . The OEM plastic bleeder screw is another known weak point: the hex head rounds off and the threads strip after just a few filter changes. This kit solves both problems in one affordable package. What's Included 6 Viton O-Rings & Seals: Primer pump diaphragm seal, filter head base gasket, heater element O-ring, WIF sensor O-ring, bleeder screw O-ring, and fuel line fitting seal all Viton for superior diesel and heat resistance CNC Billet Aluminum Bleeder Screw (Black): Replaces the OEM plastic bleeder screw (GM 97363195). Machined from solid 6061-T6 aluminum will never strip, crack, or round off Installation Guide: Step-by-step instructions with torque specs for each seal Key Features Viton Material: Unlike generic rubber O-rings that degrade in diesel within months, Viton (FKM) seals resist diesel fuel, biodiesel, engine heat (rated to 400 F), and compression set maintaining a leak-free seal for years Complete Kit: Every seal you need no running to the parts store mid-job for that one O-ring you forgot Billet Bleeder Screw: Same 6061-T6 aluminum construction as our standalone billet bleeder screw solves the stripped-thread problem permanently Dealer Alternative: GM dealers typically replace the entire filter housing ($300+) instead of rebuilding it. This $23.99 kit fixes the actual problem. Compatibility Year Make Model Engine 2001-2013 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax (LB7, LLY, LBZ, LMM) 2001-2013 GMC Sierra 2500HD / 3500HD 6.6L Duramax (LB7, LLY, LBZ, LMM) When to Rebuild Your Filter Head Primer pump never gets firm stays soft even after 20+ pumps Hard starting after truck sits overnight (air in fuel system) Visible diesel residue around the filter head or bleeder screw "Water in Fuel" light flickers intermittently (sensor O-ring leak) Fuel drips from the bottom of the housing after filter change FAQ Q: Is this a difficult DIY job? A: Moderate difficulty expect 1-2 hours. You'll need basic hand tools (10mm socket, pick set for old O-rings, torque wrench). The filter head stays on the engine you're just replacing seals. Our step-by-step rebuild guide walks you through every step. Q: Will this fix my hard start problem? A: If your hard starts are caused by air intrusion through worn seals very likely. After the truck sits, air replaces fuel in the filter head. When you crank, the injection pump has to push that air pocket through before fuel reaches the injectors. New seals prevent air from entering. If hard starts persist after rebuild, check the fuel pressure regulator and injection pump. Q: What's the difference between this and buying a whole new housing? A: A new fuel filter housing assembly