The best LLY fuel filter housing depends on your truck’s model year, engine, and whether you need a complete assembly or only a seal repair. The Dorman 904-517 is a direct-replacement option with installation hardware; the iFJF assembly is listed for several Duramax engine codes and includes a pump; and the Camoo kit is for rebuilding the primer rather than replacing the whole housing. Check fitment carefully, especially for 2004 trucks, because product listings specify different year and engine exclusions.
| Product | Best For | Type |
|---|---|---|
| Fuel Filter Housing Assembly, TP3018 | Specified 2004–2012 trucks | Housing assembly |
| 12642623 Fuel Filter Housing | Specified 2005–2012 trucks | Housing assembly |
| Dorman 904-517 | Direct-replacement shopping | Housing |
| iFJF 12642623 Housing with Pump | Specified 2005–2013 applications | Housing and pump |
| Camoo Primer Rebuild Seal Kit | Primer or seal repair | Rebuild kit |
TP3018 Fuel Filter Housing Assembly
This aluminum-head assembly is listed for numerous 2004–2012 Silverado and Sierra 2500HD and 3500HD applications with 6.6L engines. Its listed replacement references include 12642623, TP3018, 12639448, and 904-517. The feature information describes a filter with 5-micron filtration and 98% water-separation efficiency; check that the included filter and sensor configuration meets your repair needs.
Best for: Buyers whose truck matches the specific listed fitment and who want a housing assembly with a sensor. It was selected for its detailed fitment information and filtration specifications. Caution: The listing says it is not for 2004 LLY engines. For 2001–2004 models, hose modification or lengthening may be required, so confirm application before ordering.
12642623 Duramax Housing Assembly
This 12642623 assembly is listed for 2005–2012 Silverado and Sierra 2500HD and 3500HD trucks with 6.6L engines, including several Classic-year applications. The seller describes an upgraded internal filter structure, multiple sealing-performance tests, and materials intended for extended service life.
Best for: Owners of a listed 2005–2012 6.6L application seeking a replacement housing. It was selected as another assembly option with stated sealing and construction details. Caution: The supplied fitment details do not cover every LLY year or configuration. Verify the truck’s exact year and engine before purchase rather than relying on the broad Duramax name alone.
Dorman 904-517 Diesel Filter Housing
Dorman describes this product as a direct replacement designed to match the original housing’s fit and function. The listing says the necessary hardware is included to complete the repair and that the housing is made to original-equipment specifications.
Best for: Buyers prioritizing a direct-replacement description and included installation hardware. It was selected because the listing clearly explains its replacement purpose and included components. Caution: The provided product details do not state model-year fitment. Confirm that 904-517 is correct for your specific truck and engine before choosing it.
iFJF Housing With Primer Pump
This housing with pump is listed for 2005–2013 Chevrolet Silverado and GMC Sierra 2500HD and 2005–2007 3500HD models with 6.6L LLY, LBZ, or LMM engines. Its cross-references include 12642623, 12639448, and 904-517. The seller also describes a high-temperature oxidation layer intended to avoid paint flaking into the fuel system.
Best for: Buyers whose year, engine, and fuel-line orientation match the listing and who want a housing supplied with a pump. It was selected for its stated LLY fitment and cross-reference details. Caution: The listing excludes 2001–2004.5 models and warns that fuel-line orientation varies by year. Verify the exact configuration first.
Camoo Primer Rebuild Seal Kit
This kit is listed for 2001–2013 6.6L Duramax LB7, LLY, LBZ, LMM, and LML fuel-filter primers. Its stated purpose is to reseal the hand primer, drain plug, and heater wire. It is a repair kit, not a complete fuel filter housing.
Best for: Owners addressing a primer or seal issue who want to rebuild rather than replace the entire housing. It was selected as a lower-scope repair alternative. Caution: Choose a complete housing instead if the housing itself needs replacement; this kit only addresses the listed sealing components.
Buying Guide: Choosing an LLY Fuel Filter Housing
How do you verify fitment?
Start with the truck’s model year, engine code, and model series. Check whether the listing specifically includes LLY and whether it excludes a particular year or production range. A 6.6L Duramax label alone is not enough: the products above have different fitment ranges, and some warn about hose changes or fuel-line orientation. Compare the listed replacement number with the part being removed, then confirm the application using your vehicle information.
Do you need a complete housing or a rebuild kit?
Choose a complete assembly when the housing needs replacement or when the repair calls for a new housing and associated components. A primer rebuild seal kit is a narrower option for resealing the listed primer, drain plug, or heater wire. It does not replace a damaged housing. Check what is included in the assembly because the supplied listings vary in their descriptions of pumps, sensors, hardware, and filters.
Which specifications should you compare?
- Part numbers: Match the original number and listed cross-references, such as 12642623 or 904-517, where applicable.
- Included components: Determine whether the product description specifies a pump, sensor, filter, or installation hardware.
- Installation details: Look for notes about hose modification, fuel-line orientation, or year-specific fitment.
- Repair scope: Decide whether you need the whole housing or only seals for a primer-related repair.
Frequently Asked Questions
Will every 12642623 housing fit an LLY Duramax?
No. Fitment depends on the truck’s year and configuration. Check the individual listing’s engine and year coverage, including exclusions.
Is a primer rebuild kit the same as a fuel filter housing?
No. A rebuild kit addresses the listed sealing components; it is not a complete housing assembly.
Can a 2004 truck use any of these housings?
Not necessarily. One listing specifically excludes 2004 LLY engines, while another warns that earlier applications may need hose changes. Confirm fitment for the exact truck.
What does “with pump” mean in a product listing?
It indicates that the product is described as a housing supplied with a pump. Verify the included parts and application details before ordering.
Should I match the part number or the model year first?
Check both. The part number helps identify the replacement, while the model year, engine code, and configuration confirm whether it suits the vehicle.