GDUKOP Fuel Filter Housing Assembly for Duramax 6.6L (2004–2012) — Aluminum Head & Water Sensor, TP3018 Filter

GDUKOP's Fuel Filter Housing Assembly is a direct-fit replacement for Duramax 6.6L trucks (2004–2012), combining an aluminum filter head, integrated water sensor, and high-efficiency TP3018 filter for reliable fuel conditioning.

If you maintain a Chevy Silverado or GMC Sierra 2500/3500 with the 6.6L Duramax, a dependable fuel filter housing is critical to protect injectors and the fuel system. This GDUKOP assembly replaces OE part numbers including 12642623 and TP3018, and is engineered to separate water, trap particles down to about 5 microns, and accept the factory-style priming pump for easy service.

Will this housing fit my Silverado or Sierra 6.6L Duramax?

This assembly fits most 2004–2012 Chevrolet Silverado 2500/3500 and GMC Sierra 2500/3500 models equipped with the 6.6L Duramax engine, with some compatibility exceptions noted below. It can also work on 2001–2004 vehicles with a hose length or routing modification but is not intended for 2004 LLY engines.

• Direct fit for 2004–2012 Silverado/Sierra 2500HD and 3500HD (including 2007 Classic variants).
• Compatible with many 2007–2012 3500HD models and select 2004–2006 Sierra 3500 units.
• May require hose adjustment for 2001–2004 trucks; not suitable for 2004 LLY engines.

How effective is filtration and water separation?

The included TP3018 filter media is designed to capture fine contaminants and shed water before it reaches the fuel rail. Lab-style performance targets a 5-micron particle capture and high water separation efficiency, helping reduce debris and moisture that can harm fuel system components.

• Multi-layer filter media rated near 5 microns for particle removal.
• High water separation efficiency to protect pumps and injectors.
• Constructed to work with the integrated water sensor for early detection.

Is installation straightforward and what should I expect during initial use?

The housing is made as a direct OE-style replacement to simplify swap-in installation and align with factory fittings. On first fills, the priming pump may leak slightly until its O-ring becomes lubricated by fuel; disassembling the pump briefly to grease the O-ring will stop the small leak if needed.

• Direct replacement using OE mounting points and fittings.
• Prime vertically on first use to properly seat the pump and media.
• Minor initial priming-pump seepage is normal; lubricate the O-ring if needed.

What build quality and materials are used in the assembly?

GDUKOP uses an upgraded internal layout with an aluminum base for improved durability and thermal stability compared with some plastic heads. Components undergo multi-point sealing checks and a 100% inspection routine to meet or exceed typical OEM expectations.

• Durable aluminum filter head for strength and heat performance.
• Rugged water-sensing element integrated into the housing.
• Quality filter cartridge and seals tested for leak resistance and longevity.

Who is this for? This GDUKOP Fuel Filter Housing Assembly is aimed at owners, fleet managers, and technicians who want a reliable OE-style replacement for 6.6L Duramax trucks (2004–2012) that improves fuel protection and simplifies maintenance. Choose this unit if you need the OE part number cross-compatibility (12642623, TP3018, 12639448) and prefer an aluminum-headed assembly with an integrated water sensor for long-term serviceability.