Duramax 6.6L Fuel Filter Head Kit 12642623 with 1R-0750 (2005-2016)
The FJ-0750-COMB converts the factory fuel filter system on 2005-2016 GM Duramax 6.6L diesel trucks to a spin-on setup. The kit contains a billet aluminum 12642623 filter head with hand primer pump, a black-anodized 1R-0750 refit head, and a 1R-0750 fuel filter rated 5 micron with a 1″-14 UNS-2B thread.
| Tier Pricing (USD / unit) | |
|---|---|
| Qty | Unit Price |
| 1+ units | $93.99 |
| 10+ units🎯 Recommended | $89.29 |
| 50+ units | $79.89 |
| 100+ units | $75.19 |
📋 Key Specs
| Part number | 12642623 |
| Kit contents | 12642623 filter head with hand primer pump, 1R-0750 refit head with bolt and O-rings, 1R-0750 fuel filter |
| Filter thread | 1″-14 UNS-2B (the factory M36 × 1.5 element is not used with this kit) |
| Filtration | 5 micron |
| Head material | Billet aluminum 6061; electrophoretic coating on filter head, black anodized refit head |
| Seals | Two Viton O-rings at the refit head interface |
| Bleeder screw | Aluminum, replacing the original plastic part |
| Service interval | 10,000-15,000 miles |
| Fitment | 2005-2016 Chevrolet Silverado / GMC Sierra 2500HD 3500HD, 6.6L Duramax (LLY, LBZ, LMM, LML) |
❓ FAQ
Yes. The kit covers 2005-2016 Chevrolet Silverado and GMC Sierra 2500HD 3500HD trucks with the 6.6L Duramax LLY, LBZ, LMM and LML engines. Check the filter head currently fitted to the truck before ordering.
No. The 1R-0750 element uses a 1″-14 UNS-2B thread, while the factory Duramax fuel filter uses an M36 × 1.5 thread. The 1R-0750 refit head in this kit provides the mounting interface so the 1R-0750 element can be used on the engine.
Replace it every 10,000-15,000 miles, or at every other oil change. Shorten the interval with biodiesel blends or in dusty conditions, and change it sooner if the primer pump no longer builds firm pressure.
No. The retaining bolt supplied in this kit is machined so the check ball and spring inside the 12642623 filter head stay in place while the refit head is assembled onto it.
The 1R-0750 element has no built-in water separator, so the original water-in-fuel sensor is not used and is unplugged. Drain the filter on a regular schedule and use a fuel additive that handles water if the truck operates in humid or variable-fuel conditions.
MOQ varies by product: 5–100 units for standard parts (see product page). Tier pricing decreases with volume. Custom parts usually ≥ 50 units, evaluated by process.
Stock/short-run: 7–15 days; bulk orders 20–35 days; custom 30–45 days incl. sampling. Note your deadline in the inquiry — sales will confirm capacity.
Add products to the inquiry list and submit with contact info. Sales contact you within 24h and issue a formal quotation (tier pricing + proforma invoice) within 48h. The AI assistant can pre-fill inquiries in chat.
Yes. We develop from drawings/samples and support private labeling. Process: evaluation → sampling (15–25 days) → approval → mass production.
Payment: T/T 30% deposit + 70% before shipment / L/C / Trade Assurance. Shipping: FOB Ningbo/Shanghai, CIF or DDP; EU & NA warehouses; sea/air/express.
ISO 9001 & IATF 16949; CE/UL/ATEX on key products. Every batch ships with inspection reports; third-party inspection (SGS/BV) supported.
Description
Product Overview
The FJ-0750-COMB is a three-piece fuel filter conversion kit for 2005-2016 Chevrolet Silverado and GMC Sierra 2500HD 3500HD trucks with the 6.6L Duramax diesel (LLY, LBZ, LMM, LML). It replaces the GM 12642623 filter head with a machined aluminum part, adds a 1R-0750 refit head, and supplies a 1R-0750 spin-on fuel filter, so the truck runs on the 1″-14 UNS-2B filter platform instead of the factory M36 × 1.5 element.
Key Features
Cross-Reference
Specifications
Applications
Match the kit against the engine code (LLY, LBZ, LMM or LML) and the filter head currently on the truck before ordering. Replacement elements for this setup are available under the 1R-0750 number and the cross-references listed above. The 1R-0750 element has no built-in water separator, so the original water-in-fuel sensor is not used after the conversion.
