FUEL FILTER HOUSING FOR 2005-2013 DURAMAX 6.6L SILVERADO/SIERRA 2500HD 3500HD

iFJF part No.: FJ-TP3018-COMB. Duramax 6.6L Fuel Filter Housing Complete Billet Aluminum Assembly The iFJF 12642623 Fuel Filter Housing Assembly is a complete, ready-to-install billet aluminum fuel filtration unit engineered for 2005-2013 GM Duramax 6.6L V8 diesel engines (LBZ, LLY, LMM). If your factory plastic housing is cracked, leaking, or the primer pump won't hold pressure, this assembly replaces everything in one bolt-on unit no piecing together parts or reusing degraded components . Duramax owners know the OEM fuel filter housing is a known failure point. Heat cycling causes the plastic body to crack and warp, the primer pump diaphragm deteriorates, and the bleeder screw threads strip leading to air intrusion, hard starts, rough idle, and potential CP3 injection pump damage . This billet aluminum upgrade eliminates every one of those failure modes permanently. Key Features Complete Bolt-On Assembly: Includes filter head, integrated hand primer pump, WIF sensor port, bleeder screw, and mounting hardware everything pre-assembled and ready to install Billet Aluminum Construction: CNC-machined from solid 6061-T6 aluminum with corrosion-resistant anodized finish will never crack, warp, or degrade like factory plastic Direct OEM Replacement: Exact dimensional match for GM part #12642623. Bolts to factory mounting points with no modifications Improved Fuel Flow: Optimized internal passages reduce restriction for better fuel delivery under load and towing conditions Accepts Standard Filters: Compatible with TP3018 , TP3012, and 29531007 fuel/water separator elements WIF Sensor Ready: Pre-threaded port accepts your factory water-in-fuel sensor simply transfer from old housing Vehicle Compatibility Year Make Model Engine 2005-2013 Chevrolet Silverado 2500HD 6.6L Duramax V8 (LBZ, LLY, LMM) 2005-2013 Chevrolet Silverado 3500HD 6.6L Duramax V8 (LBZ, LLY, LMM) 2005-2013 GMC Sierra 2500HD 6.6L Duramax V8 (LBZ, LLY, LMM) 2005-2013 GMC Sierra 3500HD 6.6L Duramax V8 (LBZ, LLY, LMM) Technical Specifications Specification Value Replaces OEM 12642623 Material 6061-T6 Billet Aluminum (Anodized) Filter Thread M36 x 1.5 (standard Duramax spin-on) Inlet/Outlet 1/2" NPT Fuel Compatibility ULSD, B5-B20 Biodiesel WIF Sensor Port Pre-threaded accepts OEM 12639277 sensor Primer Pump Integrated hand primer (diaphragm type) SKU FJ-TP3018-COMB Installation Tools Needed: 10mm socket, 13mm wrench, flathead screwdriver, diesel-rated thread sealant Time: 30-45 minutes Pro Tip: Lube the filter O-ring with clean diesel before threading on. Use the hand primer until firm 20-30 pumps typically before starting the engine Check: Start engine, let idle 2 minutes, inspect all connections for leaks before closing hood FAQ Q: Will this fit my 2008 LMM Duramax? A: Yes. This housing fits all 2005-2013 Duramax 6.6L engines including LBZ, LLY, LMM variants in Silverado and Sierra 2500HD/3500HD. It also fits 2004.5-2005 LLY. If you have a 2001-2004 LB7, check our 12642623 Head + 1R-0750 Kit . Q: What are the signs my fuel filter housing needs replacement? A: Common symptoms: (1) Hard starting after sitting overnight air is entering the system through a cracked housing or failed primer pump seal; (2) Visible fuel leaks around the housing or bleeder screw; (3) Primer pump won't get firm diaphragm is torn; (4) "Water in Fuel" light stays on despite draining sensor port is damaged. Q: Does this come with a new WIF sensor? A: The housing includes a pre-threaded sensor port. You can re