Description
TP3018 Fuel Filter — Premium Filtration for Duramax 6.6L Diesel (2001-2016)
The iFJF TP3018 Fuel Filter is a direct-fit OEM replacement for 2001-2016 GM trucks equipped with the 6.6L Duramax diesel engine. Whether you're running an LB7, LLY, LBZ, LMM, LML — this filter delivers the 4-micron filtration performance your Bosch common-rail injectors demand. A single grain of sand-sized contaminant can score an injector nozzle — this filter prevents that. Available in 1-Pack ($49.99) or 2-Pack ($89.99 — save $10).
The TP3018 is one of the most critical maintenance items on any Duramax. GM specifies replacement every 15,000 miles, but many owners change it every other oil change (10,000 miles) for extra protection — especially if you fuel up at high-traffic stations or run biodiesel blends. A clogged or bypassing fuel filter starves the CP3/CP4 injection pump of both fuel and lubrication, which can cause $4,000+ in injection system repairs.
Key Features
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4-Micron Absolute Filtration: Multi-layer cellulose/synthetic blend media captures 99.9% of particles at 4 microns — critical protection for high-pressure common rail injectors operating at 26,000+ PSI
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Built-In Water Separation: Hydrophobic media repels and coalesces water droplets, preventing corrosion and diesel bug (microbial growth) in your tank and fuel system
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Direct OEM Cross-Reference: Replaces ACDelco TP3018, TP3012, GM 12664429, 19305685 — exact dimensional match, guaranteed fit
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15,000-Mile Service Life: Matches or exceeds GM's recommended fuel filter change interval
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Pre-Lubed Viton O-Ring: Every filter includes a fresh Viton seal — never reuse old O-rings, they shrink and leak
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Heavy-Duty Canister: Thick-gauge steel with corrosion-resistant coating stands up to road salt, moisture, and under-hood heat
Vehicle Compatibility
| Year |
Make |
Model |
Engine |
| 2001-2016 |
Chevrolet |
Silverado 2500HD / 3500HD |
6.6L Duramax V8 (LB7, LLY, LBZ, LMM, LML) |
| 2007-2016 |
GMC |
Sierra 2500HD / 3500HD |
6.6L Duramax V8 |
| 2012-2016 |
Chevrolet |
Express 2500 / 3500 / 4500 |
6.6L Duramax V8 (LGH/LML) |
| 2012-2016 |
GMC |
Savana 2500 / 3500 |
6.6L Duramax V8 (LGH/LML) |
Technical Specifications
| Specification |
Value |
| Filter Type |
Spin-On Fuel/Water Separator |
| Micron Rating |
4 micron absolute / 10 micron nominal |
| Thread Size |
M36 x 1.5 |
| Height |
Approx. 6.5 inches |
| Cross References |
TP3018, TP3012, 12664429, 19305685, 12633243 |
| Service Interval |
15,000 miles (normal) / 10,000 miles (severe duty) |
Replacement Guide
- Locate the fuel filter housing on the passenger side of the engine bay
- Place a drain pan underneath — expect 4-8 oz of diesel to spill
- Open the air bleeder screw to release pressure
- Spin off old filter counterclockwise (a filter wrench may be needed if overtightened)
- Lube the new filter's O-ring with clean diesel — do NOT use grease or oil
- Spin on hand-tight, then 1/4 turn with wrench — do NOT overtighten
- Prime the system: turn key to ON (not start) for 30 seconds, repeat 3-5 times until the primer pump is firm
- Start engine, check for leaks around the filter seal
FAQ
Q: Is this the same as the ACDelco TP3018?
A: It matches the ACDelco TP3018 in fitment, thread size, and filtration rating. Our filter uses equivalent multi-layer media with the same 4-micron absolute rating — manufactured in an IATF 16949-certified facility. You get OEM-equivalent protection at aftermarket pricing.
Q: What happens if I don't change my fuel filter on time?
A: A clogged fuel filter restricts fuel flow to the injection pump. Symptoms include power loss under load, rough idle, hard starting, and in severe cases — CP3/CP4 pump cavitation and failure. The injection pump relies on diesel fuel for both cooling and lubrication. A restricted filter starves it of both. Injector replacement on a Duramax costs $3,000-$5,000. A $49.99 filter is cheap insurance.
Q: Will this fit my 2001 LB7?
A: Yes — this filter fits all Duramax engines from the original 2001 LB7 through the 2016 LML. The filter thread (M36 x 1.5) has been standard across all generations.
Q: Can I use this filter with biodiesel (B5-B20)?
A: Yes, compatible with ULSD and biodiesel blends up to B20. Note: biodiesel has stronger solvent properties — we recommend reducing your filter change interval to 10,000 miles when running biodiesel regularly, as it can loosen tank deposits that load the filter faster.
Q: Why does my truck feel sluggish after the filter change?
A: You likely have air in the system. Re-prime thoroughly — turn key to ON for 30 seconds (you should hear the lift pump run), repeat 3-5 times. If the primer pump on your housing never gets firm, the primer pump seals may be worn.
Q: What's the difference between your TP3018 and the WIX equivalent?
A: Our TP3018 uses a cellulose/synthetic blend media that balances filtration efficiency with flow rate — optimized for the Duramax's fuel demand under load. WIX 33960XE uses a full synthetic media. Both are quality filters; ours is priced $10-15 less per unit.
Q: Should I buy the 2-pack?
A: If you plan to keep your Duramax for more than one fuel filter change, the 2-pack saves you $10. Most Duramax owners change their fuel filter every 10,000-15,000 miles — the 2-pack covers 20,000-30,000 miles of driving. Keep the spare on your garage shelf.
Q: Why is the TP3018 the most popular Duramax fuel filter?
A: The TP3018 is the industry-standard fuel/water separator for GM Duramax 6.6L engines — with 1,300+ monthly searches and a 15.2% purchase rate among Duramax owners actively shopping. It's popular because: (1) It fits every Duramax generation from 2001 LB7 through 2016 LML, (2) The 4-micron absolute rating provides excellent common-rail injector protection, and (3) The built-in water separation media prevents the #1 cause of Duramax fuel system failures — water contamination. Every Duramax owner should keep a spare on the shelf.
Q: What's the difference between TP3018 and TP3012?
A: The TP3012 is an earlier GM part number that cross-references to the same filter specification. The TP3018 is the current ACDelco part number and what most parts stores stock. Both fit the same M36 x 1.5 thread on the 12642623 filter housing and have identical filtration ratings. Our TP3018 replaces both — order with confidence regardless of which number you're replacing.
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