Description
Product Overview
The 12642623 Fuel Filter Head Kit is the ultimate fuel filtration upgrade for your GM Duramax 6.6L diesel truck. This comprehensive package includes two essential components: the 12642623 billet aluminum fuel filter head with integrated hand primer pump and heater element, plus the 1R-0750 Refit Head that converts your fuel system to accept high-flow, lower-cost CAT 1R-0750 spin-on filter elements. Compatible with 2005-2016 Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD trucks with Duramax LLY, LBZ, LMM, and LML engines, this kit addresses the two biggest weaknesses of the factory fuel system: the failure-prone plastic filter housing and the expensive, restrictive OEM filter element.
Compatibility
| Make |
Model |
Year Range |
Engine Code |
| Chevrolet |
Silverado 2500HD |
2005 – 2016 |
LLY / LBZ / LMM / LML |
| Chevrolet |
Silverado 3500HD |
2005 – 2016 |
LLY / LBZ / LMM / LML |
| GMC |
Sierra 2500HD |
2005 – 2016 |
LLY / LBZ / LMM / LML |
| GMC |
Sierra 3500HD |
2005 – 2016 |
LLY / LBZ / LMM / LML |
Replaces OEM Part Numbers: 12642623, 12664429 (filter head base)
Specifications
| Specification |
Detail |
| Part Number (SKU) |
FJ-12642623-1R0750 |
| Filter Head Material |
Billet Aluminum with Electrophoresis Coating |
| Refit Head Material |
CNC Billet Aluminum, Black Anodized |
| Hand Pump Material |
Iron Body & Tubes |
| Bleeder Screw |
Aluminum (Upgraded from Plastic OEM) |
| Heater Element |
Included (Factory Plug Compatible) |
| Compatible Filter |
CAT 1R-0750 Spin-On (High-Flow) |
| Warranty |
60-Day Satisfaction Guarantee |
Key Features
-
Billet Aluminum Construction: Both the filter head and refit adapter are CNC-machined from solid billet aluminum — dramatically more durable than the factory plastic housing that's notorious for cracking, leaking, and stripping threads.
-
CAT 1R-0750 Filter Conversion: The included refit head allows you to use the widely available CAT 1R-0750 spin-on filter element (sold separately). This filter offers 2-micron absolute filtration, higher flow rates, and costs significantly less than the OEM ACDelco element.
-
Upgraded Bleeder Screw: We've replaced the fragile plastic OEM bleeder screw with a precision-machined aluminum screw — no more stripping during routine filter changes.
-
Integrated Hand Primer Pump: The built-in iron hand pump eliminates the need for external priming tools. After a filter change, simply pump the primer to purge air from the system before starting.
-
Corrosion Protection: The electrophoresis surface treatment on the filter head base provides superior corrosion resistance compared to raw aluminum, protecting against road salt, moisture, and diesel exposure.
-
Simplified Installation: Our improved refit head bolt design eliminates the need to remove the check ball and spring from the 12642623 filter head before assembly — saving time and preventing lost small parts.
-
Heater Element Included: Comes with a factory-compatible fuel heater plug that connects directly to your existing wiring harness for cold-weather starting reliability.
Why Choose iFJF
iFJF engineers aftermarket solutions that solve real problems Duramax owners face. We saw too many trucks stranded by cracked plastic filter housings and expensive OEM filters, so we developed this complete upgrade kit. Every component is manufactured to tight tolerances and inspected before packaging. The electrophoresis coating, black-anodized refit head, and upgraded bleeder screw are details that demonstrate our commitment to quality. Thousands of Duramax owners trust iFJF for fuel system parts that outperform factory equipment at a fraction of the cost.
FAQ
Q: What makes this kit better than the OEM fuel filter head?
A: Three major improvements: (1) Billet aluminum replaces fragile plastic that commonly cracks, (2) the 1R-0750 refit head lets you use CAT spin-on filters that filter down to 2 microns at a lower cost per change, and (3) our aluminum bleeder screw won't strip like the OEM plastic one. It's a permanent upgrade, not just a replacement.
Q: Will the CAT 1R-0750 filter work with my existing fuel system?
A: Yes, once the 1R-0750 refit head is installed on your 12642623 filter base. The CAT 1R-0750 filter (not included) is a high-flow, 2-micron absolute spin-on element that provides superior filtration compared to the factory ACDelco TP3018 cartridge. It's widely available at CAT dealers, truck stops, and online.
Q: Can I install this myself?
A: Yes, this is a bolt-on upgrade. Basic mechanical skills and hand tools are all you need. The filter head mounts to the factory bracket, and the electrical connector for the heater plugs right in. The improved refit head bolt design means you no longer need to disassemble the check ball and spring. Typical installation takes 1-2 hours.
Q: Does this kit include the filter element?
A: The CAT 1R-0750 filter element is sold separately. This kit includes the filter head base, refit adapter, hand pump assembly, bleeder screw, heater plug, mounting bolts, and O-rings — everything needed to convert your truck to accept 1R-0750 filters.
Q: Will this fit my 2015 LML?
A: Yes, this kit is fully compatible with 2011-2016 LML Duramax engines in both Silverado and Sierra 2500HD/3500HD trucks. The 12642623 filter head is the correct replacement for LML applications.
Explore Related Products
Building a bulletproof Duramax fuel system? Check our Diesel Fuel System Collection for CAT 1R-0750 filter multi-packs, fuel pressure regulators, lift pumps, and complete fuel system rebuild kits. Also browse our Duramax Parts Collection for engine-specific upgrades.
