Duramax 6.6L Parts

Component:A combination of 1 x TP3018 fuel filter,1 x 12642623 fuel filter head,1 x 12639277 water in fuel indicator sensor. Fitment:2004-2013 Duramax 6.6L Chevrolet Silverado and GMC Sierra Engine Chevy fuel filter.Will work on 2001 2002 2003 2004 But the hoses do need to be modified or lengthened. TP3018 fuel filter:The independent filter Fits 2004-2016 lly,lbz,chevy silverado duramax fuel filter.Multi Layer Filter Media.filter element 5 micron.Water separation efficiency 98%. 12642623 Fuel filter head:Made of billet aluminum,electrophoresis process to protect it from oxidation and corrosion,easy to clean.Includes a heater plug.The aluminum air bleeder screw on the head which replaced plastic OEM screw was more durable. Water in fuel indicator sensor:Fit 2001-2011,8 sided desigh,which is not same as OEM’s 12 sided.Let the Engine Control Unit(ECU) and/or dashboard lamp indicator know when water detection has occurred in the vehicle's fuel supply.

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Fuel Filter Head Assembly for 2005-2013 Duramax 6.6LThis complete fuel filter head assembly replaces the failure-prone factory unit on 2005-2013 Duramax trucks. The aluminum construction eliminates the cracking issues of the OEM plastic housing, and the integrated hand priming pump makes fuel system bleeding quick and tool-free.Key Features Aluminum Construction — Replaces plastic OEM housing that cracks over time Built-in Hand Primer — Bleed the fuel system without tools after filter changes Includes Bleeder Screw — Integrated air bleeder for complete system priming Heating Element Ready — Compatible with factory fuel heater connection Direct Fit — Replaces GM 12642623 for 2005-2013 Duramax LLY/LBZ/LMM Compatibility Year Engine Models 2005-2013 6.6L Duramax LLY/LBZ/LMM Silverado 2500HD/3500HD, Sierra 2500HD/3500HD FAQQ: Why do the stock housings fail?A: The OEM plastic filter head becomes brittle from heat cycling and can crack at the threads or bleeder screw boss.Q: Does this fit the LML (2011-2016)?A: No. The LML uses a different filter housing design. This fits LLY/LBZ/LMM (2005-2013) only.Q: Is the hand primer difficult to use?A: No — simply pump it 10-15 times after a filter change to prime the system. Much easier than cycling the key.Q: Does it come with the mounting gasket?A: Yes, the complete assembly includes the housing, primer pump, bleeder screw, and mounting gasket.

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Fuel Filter Housing Cap for 2017-2020 Duramax 6.6L L5P The OEM plastic fuel filter housing cap on 2017-2020 Duramax 6.6L L5P engines is a known failure point — cracking, warping, and leaking under heat cycling and repeated service. Our CNC-machined billet 6061-T6 aluminum cap with black anodized finish eliminates this problem permanently. Replaces GM part number 134001. Key Features CNC Billet 6061-T6 Aluminum — Precision machined from aircraft-grade aluminum, far stronger than the OEM injection-molded plastic cap. Black Anodized Finish — Corrosion-resistant coating stands up to diesel fuel, road salt, and under-hood heat cycling. OEM-Plus Design — Engineered to match factory fit and function while eliminating the cracking/leaking failure mode. Threads perfectly onto the stock filter housing. Complete Kit — Includes 1 billet aluminum cap and 1 drain plug. (O-ring sold separately or reuse existing.) Easy Install — Direct bolt-on replacement. No modifications, no special tools. 10-minute swap. Compatibility Year Make Model Engine 2017-2020 Chevy Silverado 2500HD 6.6L V8 Diesel (L5P) 2017-2020 Chevy Silverado 3500HD 6.6L V8 Diesel (L5P) 2017-2020 GMC Sierra 2500HD 6.6L V8 Diesel (L5P) 2017-2020 GMC Sierra 3500HD 6.6L V8 Diesel (L5P) Specifications Material: CNC Billet 6061-T6 Aluminum Finish: Black Anodized Replaces OEM: 134001 Package: 1x Housing Cap + 1x Drain Plug Why Choose iFJF? The OEM plastic cap on your Duramax 6.6L L5P sees extreme temperatures, diesel fuel exposure, and removal/reinstallation at every filter change. Over time, the plastic fatigues — and when it cracks, you lose fuel pressure, leak diesel, or get stranded. Our billet aluminum cap is a one-time upgrade that outlasts the truck. IATF 16949 certified manufacturing. Backed by our satisfaction guarantee. Frequently Asked Questions Q: Why does the OEM plastic cap fail?A: The GM factory cap is injection-molded plastic that degrades under heat cycling and repeated removal. Diesel fuel exposure accelerates cracking. This is a well-documented problem on 2017-2020 L5P engines — many owners replace it preventatively. Q: Is this a direct fit or do I need modifications?A: Direct bolt-on replacement. The threads, sealing surface, and drain plug are precision-machined to match the factory housing exactly. No adapters, no modifications. Q: Does this come with the O-ring?A: The cap does not include the O-ring. We recommend reusing your existing O-ring if it's in good condition, or purchasing a new OEM O-ring separately. Q: Will this fit a 2016 Duramax LML?A: No. This cap is designed specifically for the 2017-2020 L5P fuel filter housing. LML (2011-2016) uses a different filter housing design. Q: How do I install this?A: Remove the old plastic cap with a 36mm socket, unscrew the drain plug, transfer it to the new cap, thread the new cap on hand-tight + 1/4 turn with the socket. Cycle the key 3-5 times to prime, then start and check for leaks. 10-minute job. Q: What torque should I use?A: Hand-tighten, then 1/4 turn with a 36mm socket. Approximately 18-22 ft-lbs. Do NOT overtighten — the aluminum threads are strong but the housing seal is what does the work. 📖 Read our complete Duramax L5P Fuel Filter Replacement Guide →

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iFJF TP1015 Fuel Filter — 5-Micron Absolute Protection for Your Duramax L5P Already running an upgraded billet aluminum housing cap? Excellent choice. Now keep it fed with the iFJF TP1015 replacement fuel filter element — the same 5-micron absolute-rated filter that ships in our combo kits, sold standalone for customers who already made the cap upgrade. Same filtration. Same Viton O-rings. Same CP4.2 pump protection. Just the filter, no cap included. Engineered for 2017–2020 Chevy Silverado & GMC Sierra 2500HD/3500HD with the 6.6L L5P Duramax diesel engine, the TP1015 delivers filtration performance that leaves the OEM ACDelco paper element in the dust — literally. If your current filter has 15,000+ miles on it, you're overdue. 📊 TP1015 vs. OEM ACDelco Filter Element Specification iFJF TP1015 OEM ACDelco TP1015 Micron Rating 5 Micron (Absolute) 7–10 Micron (Nominal) Filter Media Multi-Layer Synthetic Blend Cellulose Paper Water Separation 98% Efficiency ~95% Efficiency O-Ring Material 2 × Viton® (Diesel-Rated, 400°F) 1 × Standard Nitrile Dirt-Holding Capacity 2× OEM Capacity Baseline Price $17.99 $29–$42 🚛 Compatible Vehicles Chevrolet Silverado 2500HD / 3500HD 2017 · 2018 · 2019 · 2020 6.6L L5P Duramax Turbo Diesel V8 GMC Sierra 2500HD / 3500HD 2017 · 2018 · 2019 · 2020 6.6L L5P Duramax Turbo Diesel V8 Also Fits: Chevy Cruze 2.0L Diesel (2014–2015), Chevy Cruze 1.6L Diesel (2017–2019) 🔢 Cross-Reference / Replaces OEM Part Numbers iFJF: TP1015 ACDelco: TP1015 · 22937279 GM Genuine: 23456595 · 23304096 ⚙️ Technical Specifications Filter Media: Multi-layer synthetic blend with hydrophobic barrier layer — traps particles down to 5μm while repelling water droplets from the fuel stream Filtration Rating: 5 micron absolute (β≥1000) — captures 99.9% of particles ≥5μm. OEM paper filters are rated nominally at 7–10μm, meaning they let significantly more particulate through to your CP4.2 high-pressure pump Water Separation: 98% removal efficiency — the hydrophobic layer strips emulsified water from diesel fuel, critical for protecting the CP4.2 injection pump from cavitation erosion and catastrophic failure O-Rings: 2 premium Viton® fluoroelastomer O-rings (1 × large cap seal, 1 × small filter seal) — rated to 400°F continuous, compatible with ULSD, B20 biodiesel, and common diesel fuel additives Service Interval: Replace every 15,000–22,500 miles (24,000–36,000 km). Reduce to 15,000 miles if towing heavy, extended idling, or running biodiesel blends Filter Construction: Spiral-wound pleated media with epoxy-sealed end caps — no bypass valve failures, consistent flow under high fuel demand 📦 What's in the Box 1 × TP1015 Fuel Filter Element (multi-layer synthetic blend media, 5μm absolute) 2 × Viton® O-rings (large cap seal + small filter seal) 1 × Installation instruction card ⚠️ Housing cap NOT included — this is the filter element only. If you need a cap upgrade, see our Silver Cap Kit or Black Cap Kit. 🛠️ Installation Tips PRIME THE FILTER: Fill the new filter with clean diesel before installing. A dry filter means a dry CP4.2 on first start — and that can lead to a $4,000+ pump replacement. LUBE THE O-RINGS: Apply a thin film of clean diesel or silicone grease to both O-rings. Dry O-rings can pinch, tear, or roll during installation — all of which cause air leaks and hard-start conditions. TORQUE TO SPEC: If you're using the OEM plastic cap, torque to 18 ft-lbs (25 N·m) — no more. If you're using an iFJF billet aluminum cap, the same torque spec applies, but the aluminum cap won't crack if you go slightly over. BLEED THE SYSTEM: After installation, cycle the key to "ON" (without cranking) 3–5 times. You'll hear the in-tank lift pump cycle. The L5P fuel system is self-priming — no manual bleeding required. LEAK CHECK: Start the engine and inspect the filter housing area. Any dampness around the cap seal means the O-ring isn't seated. Shut down, reseat, and retorque. ❓ FAQ Q: Will this fit my 2017–2020 Duramax L5P? A: Yes — as long as your truck uses the cartridge-style fuel filter housing (GM part #134001 housing). This filter fits all 2017–2020 Silverado/Sierra 2500HD/3500HD with the 6.6L L5P engine. Also fits Chevy Cruze 1.6L/2.0L diesel models. Q: How often should I replace the fuel filter? A: GM recommends every 22,500 miles. We recommend every 15,000 miles if you tow heavy, idle frequently, or run any biodiesel blends. The TP1015 has 2× the dirt-holding capacity of the OEM filter, but diesel fuel quality varies — err on the side of more frequent changes. Q: Can I use this TP1015 filter with the OEM plastic cap? A: Yes, the TP1015 filter element is a direct dimensional match for the OEM housing. However, the factory plastic cap is a known failure point (GM TSB #18-NA-103). We strongly recommend upgrading to our 6061-T6 billet aluminum cap for permanent peace of mind. Q: Will using this aftermarket filter void my factory warranty? A: No. Under the Magnuson-Moss Warranty Act (15 U.S.C. § 2302), a manufacturer cannot void your warranty for using aftermarket parts unless they prove the aftermarket part directly caused the failure. The iFJF TP1015 meets or exceeds all OEM filtration specifications — GM would have a very hard time making that case. 🛒 Complete Your Fuel System Upgrade This filter is just one piece of the L5P fuel system puzzle: Need the billet cap? Silver 134001 Cap + TP1015 Kit — $69.99, includes filter + CNC 6061-T6 cap Prefer stealth black? Black 134001 Cap + TP1015 Kit — $69.99, same premium kit in black anodized finish Due for an air filter too? TP1015 + A3231C Air Filter Combo — $37.99, both filters in one order Just need the air filter? A3231C Air Filter — $29.99, high-flow drop-in replacement for 2017–2019 L5P ⚠️ IMPORTANT: Always prime the fuel filter with clean diesel before installation. A dry-start on the CP4.2 high-pressure fuel pump can cause catastrophic failure — a $4,000+ repair you don't want.

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Upgrade Your Duramax L5P Fuel System — TP1015 Filter & 6061-T6 Billet Aluminum Housing Cap Engineered for 2017–2020 Chevy Silverado & GMC Sierra 2500HD/3500HD equipped with the 6.6L L5P Duramax diesel engine, the iFJF TP1015 Fuel Filter & 134001 Housing Cap Combo Kit solves the two biggest pain points of L5P fuel system maintenance: factory plastic cap failures and subpar filtration. One kit. One install. Total peace of mind. 🔧 The Problem with OEM L5P Fuel Filter Caps The factory 134001 plastic housing cap on 2017–2020 Duramax L5P trucks is a known weak point. Overtighten it by even a quarter turn and the plastic cracks — leaving you with a fuel leak, a check engine light, and a $200+ tow to the nearest shop. GM TSB #18-NA-103 documents this exact issue. iFJF replaces that brittle plastic with a CNC-machined 6061-T6 billet aluminum cap — the same aerospace-grade alloy used in performance fuel systems. It won't crack. It won't warp. It won't leave you stranded. 📊 Why iFJF TP1015 vs. OEM Specification iFJF TP1015 OEM (ACDelco) Cap Material 6061-T6 Billet Aluminum Nylon Plastic Filter Micron Rating 5 Micron (Absolute) 7–10 Micron (Nominal) Water Separation 98% Efficiency ~95% Efficiency Filter Media Multi-Layer Synthetic Blend Cellulose Paper O-Ring Included ✅ 2 Premium Viton O-Rings ✅ 1 Standard O-Ring Drain Plug Anodized Aluminum (5 Color Options) Plastic (Non-Serviceable) Price (Filter + Cap) $69.99 $95–$130 (Filter + Cap separately) 🚛 Compatible Vehicles Chevrolet Silverado 2500HD / 3500HD 2017 · 2018 · 2019 · 2020 6.6L L5P Duramax Turbo Diesel V8 GMC Sierra 2500HD / 3500HD 2017 · 2018 · 2019 · 2020 6.6L L5P Duramax Turbo Diesel V8 Also Fits: Chevy Cruze 2.0L Diesel (2014–2015), Chevy Cruze 1.6L Diesel (2017–2019) 🔢 Cross-Reference / Replaces OEM Part Numbers Fuel Filter: TP1015 · 22937279 · 23456595 · 23304096 · ACDelco TP1015 Housing Cap: 134001 · ACDelco 134001 ⚙️ Technical Specifications Filter Media: Multi-layer synthetic blend with pleated cellulose core — superior dirt-holding capacity vs. OEM paper Filtration Rating: 5 micron absolute — captures 99.9% of particles ≥5μm (OEM paper elements typically rate 7–10μm nominal) Water Separation: Hydrophobic barrier layer achieves 98% water removal efficiency, protecting CP4.2 high-pressure fuel pump from water-induced cavitation damage Cap Material: CNC billet 6061-T6 aluminum with black anodized finish on Silver variant Cap Design: 32mm hex head for standard socket wrench — no special tools needed Drain Plug: Integrated anodized aluminum drain valve for easy water drainage during service intervals O-Rings: 2 premium Viton® fluoroelastomer O-rings (cap seal + filter seal) — rated to 400°F, diesel-resistant Service Interval: Replace every 15,000–22,500 miles (24,000–36,000 km) or per GM maintenance schedule Torque Spec: 25 ± 3 N·m (18 ± 2 ft-lbs) — no risk of cracking vs. plastic cap 🎨 Available Finishes — 5 Anodized Colors Choose the cap color that matches your build: 🔴 Red — Aggressive, race-inspired look 🟡 Gold — Premium, standout finish 🟢 Green — Subtle OEM+ appearance ⚪ Silver — Classic machined aluminum with black trim ⚫ Black — Stealth, factory-look finish 📦 What's in the Box 1 × TP1015 Fuel Filter (multi-layer synthetic blend media, 5μm) 1 × 134001 Housing Cap (CNC 6061-T6 billet aluminum) 1 × Anodized aluminum drain plug (pre-installed) 2 × Viton® O-rings (large cap seal + small filter seal) 1 × Installation instruction card 🛠️ Installation Tips PRIME THE FILTER: Fill the new filter with clean diesel before installing — this prevents the CP4.2 pump from running dry on first start. LUBE THE O-RINGS: Apply a thin film of clean diesel or silicone grease to both O-rings before installation. TORQUE TO SPEC: Hand-tighten, then torque to 18 ft-lbs (25 N·m). Threads engage smoothly — if you feel resistance, back off and realign. BLEED THE SYSTEM: After installation, cycle the key to "ON" (without starting) 3–5 times to prime the fuel system. The CP4.2 is self-priming — you'll hear the in-tank pump cycle. CHECK FOR LEAKS: Start the engine and inspect the cap area. No drips = good to go. ❓ FAQ Q: Will this fit my 2021+ L5P Duramax? A: No. GM changed the fuel filter housing design for 2021+ model years. This kit is specifically for 2017–2020 L5P trucks. For 2021+, use our updated L5P 2021+ filter kit. Q: How often should I replace the fuel filter? A: GM recommends every 22,500 miles under normal conditions. If you tow heavy, idle frequently, or run biodiesel blends, replace every 15,000 miles. Q: Can I reuse the aluminum cap with future filter changes? A: Yes! The 6061-T6 cap is a lifetime upgrade. Only the filter element and O-rings need replacement at each service interval. We sell replacement filter-only kits. Q: Does this void my warranty? A: No. Under the Magnuson-Moss Warranty Act, using aftermarket parts does not automatically void your warranty. The TP1015 meets or exceeds all OEM filtration specs. ⚠️ IMPORTANT: Always prime the fuel filter with clean diesel before installation. A dry-start CP4.2 high-pressure pump can cause catastrophic failure — a $4,000+ repair you don't want.

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Fitment: Fuel Filter for Duramax 6.6L 2001-2016 Chevy Silverado/GMC Sierra 2500 HD Engine and more. Replaces part number: TP3018, TP3012, 19305685, 12664429, 12633243, 33960XE, LFF6012, BF46062, P550517, FF5501, F55464, PS9059B. Element: Multi-Layer Filter Media Design, Outer filter element 15 micron.Inner filter element 5 micron.Water separation efficiency is 98%. Feature: Protects your vehicle's fuel system from particles such as dirt, rust, and paint particles before they enter the fuel delivery system to improve engine's performance. Note: Please replace the fuel filter regularly and don’t reuse old ones.

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Fix Your Duramax Fuel Filter Head for $13.99 — Instead of $200+ for a New Housing If your Duramax is leaking fuel from the filter housing, the hand primer feels mushy, or the truck stalls shortly after startup, you don't need a $200+ replacement filter head. In most cases, the seals have simply hardened and the plastic bleeder screw has failed — both of which are fixed with this 6-piece rebuild kit + aluminum bleeder screw upgrade for less than fourteen bucks. What's in the Kit Part Material What It Fixes Aluminum Bleeder Screw ×1 Billet 6061-T6 Aluminum, Black Anodized Replaces fragile plastic bleeder that strips & cracks Plunger U-Cups ×2 Nitrile Rubber Restores primer pump pressure — no more "mushy" feel Viton O-Rings ×4 Viton (Fluorocarbon) Seals fuel & air pathways, stops leaks at the housing 🚛 Vehicle Compatibility Fits all 2001–2013 GM 6.6L Duramax fuel filter housings across these platforms: Chevrolet Silverado 2500HD/3500HD (2001–2013) GMC Sierra 2500HD/3500HD (2001–2013) Chevrolet Kodiak / GMC TopKick C4500–C8500 Engine codes: LB7 (2001–2004), LLY (2004.5–2005), LBZ (2006–2007), LMM (2007.5–2013) When You Need This Kit 🔧 Fuel Leak at the Filter Head — Fuel pooling near the bleeder screw or around the primer pump means the O-rings have hardened. This kit replaces all serviceable seals in one shot. 🔧 Soft or Non-Functional Hand Primer — If the primer won't build pressure after 10–15 pumps, the plunger U-cups are worn. These nitrile seals restore the vacuum needed to pull fuel from the tank. 🔧 Bleeder Screw Stripped or Cracked — The stock GM plastic bleeder screw is notorious for stripping threads and cracking. Our CNC-machined 6061-T6 aluminum bleeder is a lifetime upgrade — it won't strip, crack, or leave fragments inside the housing. 🛠️ Installation Tips Relieve fuel pressure before disconnecting any lines — loosen the bleeder screw first. Use a small pick tool to remove old O-rings without scratching sealing surfaces. Lubricate all seals with clean engine oil before installation to prevent pinching. The orange O-ring goes on the bleeder screw — don't mix it up with the Viton housing O-rings. The plunger U-cups install with the lip facing away from the flange for the outer seal, and toward the flange for the inner seal. After reassembly, test the primer before reinstalling on the truck — place your thumb over the inlet and pump until you feel vacuum. ❓ Frequently Asked Questions Q: Will this kit fit my LML (2011–2016) Duramax? This kit is designed for 2001–2013 filter heads (LB7 through LMM). The LML (2011–2016) uses a different filter housing design. For LML applications, check our Duramax collection for the correct kit. Q: Do I need to remove the entire filter head from the truck? Yes — the plunger U-cups and O-rings are installed inside the filter head housing, which requires the assembly to be on a workbench. The job takes about 45–60 minutes start to finish. Our step-by-step Duramax filter head rebuild guide walks you through every step. Q: The molded rubber seals inside my primer housing are leaking — does this kit include them? No — the molded seals inside the primer housing are not serviceable. If those have failed, you need a complete filter head replacement (ACDelco 12642623 or Dorman 904-401). Our rebuild kit addresses the 6 serviceable seals that cause 90%+ of filter head issues. Q: How is this aluminum bleeder screw better than the stock plastic one? The stock plastic bleeder screw strips threads easily, cracks from heat cycling, and can leave plastic fragments inside the fuel housing. Our billet 6061-T6 aluminum screw is CNC-machined, black anodized for corrosion resistance, and uses the same thread pitch as OEM — it's a direct drop-in replacement that will outlast the truck. Q: Do I need a new fuel filter after rebuilding the filter head? Yes. Once the filter head is opened to air, contaminants can enter. Install a fresh fuel filter (ACDelco TP3018 or equivalent) and prime the system fully before starting the engine. Browse our diesel fuel filter collection for compatible filters.

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Fitment:Fuel Filter for Duramax 6.6L 2001-2016 Chevy Silverado/GMC Sierra 2500 HD Engine and more. Replaces part number:TP3018,TP3012,19305685,12664429,12633243,33960XE,LFF6012,BF46062,P550517,FF5501,F55464,PS9059B. Element:Multi Layer Filter Media Design,Outer filter element 15 micron.Inner filter element 5 micron.Water separation efficiency 98%. Feature:Protects your vehicle's fuel system from particles such as dirt, rust, and paint particles before they enter the fuel delivery system to improve engine's performance. Package includes: 2 x TP3018 Fuel filters.

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iFJF TP1015 Fuel Filter & Black 134001 Billet Aluminum Cap — Stealth Upgrade for Duramax L5P Same aerospace-grade 6061-T6 billet aluminum cap. Same 5-micron TP1015 filter. Same CP4.2-saving filtration. The only difference from our Silver Cap kit? A deep black Type II anodized finish that disappears into your engine bay like it came from the factory that way. Built for the 2017–2020 Chevy Silverado & GMC Sierra 2500HD/3500HD with the 6.6L L5P Duramax diesel, this kit is for owners who want the bulletproof reliability of billet aluminum without the flash. The black anodized cap is understated, corrosion-proof, and will never crack — unlike the OEM nylon plastic cap that GM themselves have documented as a failure point. ⚫ Black vs. Silver — Same Cap, Different Vibe We offer the 134001 billet cap in five anodized colors. The Black finish is the choice for: Stealth / OEM+ builds — looks like it belongs there. Most techs won't notice it's not stock until they grab a socket. Dark engine bay aesthetics — matches factory black trim, hoses, and airbox. Corrosion resistance — Type II anodizing creates a hard aluminum oxide layer that won't flake, fade, or rust, even with road salt and diesel splash. Resale-conscious owners — looks stock enough that no buyer is going to question it, but the next owner will thank you. Prefer a brighter look? Check out our Silver Cap Kit — same internals, polished machined finish. 📊 iFJF Billet Cap vs. OEM Plastic Cap Specification iFJF 134001 (Black) OEM (ACDelco) Cap Material 6061-T6 Billet Aluminum Nylon Plastic Finish Black Type II Anodized Unfinished Black Plastic Hex Size 32mm — Standard Socket 32mm (Plastic) Torque Spec 25 ± 3 N·m (18 ± 2 ft-lbs) 25 N·m (prone to cracking) Crack Resistance ✅ Won't Crack. Won't Warp. ⚠️ Known Failure (TSB #18-NA-103) Drain Plug Black Anodized Aluminum Plastic (Non-Serviceable) Corrosion Resistance Type II Hard Anodized — Diesel + Salt Rated N/A (Plastic) Kit Price (Filter + Cap) $69.99 $95–$130 (Filter + Cap separately) 🚛 Compatible Vehicles Chevrolet Silverado 2500HD / 3500HD 2017 · 2018 · 2019 · 2020 6.6L L5P Duramax Turbo Diesel V8 GMC Sierra 2500HD / 3500HD 2017 · 2018 · 2019 · 2020 6.6L L5P Duramax Turbo Diesel V8 Also Fits: Chevy Cruze 2.0L Diesel (2014–2015), Chevy Cruze 1.6L Diesel (2017–2019) 🔢 Cross-Reference / Replaces OEM Part Numbers Fuel Filter: TP1015 · 22937279 · 23456595 · 23304096 · ACDelco TP1015 Housing Cap: 134001 · ACDelco 134001 ⚙️ Technical Specifications Filter Media: Multi-layer synthetic blend with pleated cellulose core — superior dirt-holding capacity vs. OEM paper Filtration Rating: 5 micron absolute — captures 99.9% of particles ≥5μm (OEM paper elements typically rate 7–10μm nominal) Water Separation: Hydrophobic barrier layer achieves 98% water removal efficiency, protecting CP4.2 high-pressure fuel pump from water-induced cavitation damage Cap Material: CNC-machined 6061-T6 billet aluminum with black Type II anodized finish — hard, chemically resistant oxide layer that won't chip, peel, or fade Cap Design: 32mm hex head for standard socket wrench — no special tools, no stripped plastic corners Drain Plug: Integrated black anodized aluminum drain valve for easy water drainage during service intervals O-Rings: 2 premium Viton® fluoroelastomer O-rings (cap seal + filter seal) — rated to 400°F continuous, resistant to ULSD, B20, and fuel additives Service Interval: Replace filter every 15,000–22,500 miles (24,000–36,000 km). Cap is a lifetime component — reuse through every filter change. Torque Spec: 25 ± 3 N·m (18 ± 2 ft-lbs) — no risk of cracking vs. plastic cap 📦 What's in the Box 1 × TP1015 Fuel Filter (multi-layer synthetic blend media, 5μm absolute) 1 × 134001 Housing Cap — CNC 6061-T6 billet aluminum, black Type II anodized 1 × Black anodized aluminum drain plug (pre-installed) 2 × Viton® O-rings (large cap seal + small filter seal) 1 × Installation instruction card 🛠️ Installation Tips PRIME THE FILTER: Fill the new filter with clean diesel before installing — this prevents the CP4.2 pump from running dry on first start. LUBE THE O-RINGS: Apply a thin film of clean diesel or silicone grease to both O-rings before installation. Dry O-rings can roll, pinch, or tear — causing hard starts and air in the fuel system. TORQUE TO SPEC: Hand-tighten, then torque to 18 ft-lbs (25 N·m). The billet cap threads engage smoothly — if you feel any resistance, back off and realign. BLEED THE SYSTEM: After installation, cycle the key to "ON" (without starting) 3–5 times to prime the fuel system. The CP4.2 is self-priming — you'll hear the in-tank pump cycle. CHECK FOR LEAKS: Start the engine and inspect the cap area. No drips = good to go. ❓ FAQ Q: What's the difference between the Black Cap and Silver Cap kits? A: Only the anodized finish color. Both caps are CNC-machined from the same 6061-T6 billet aluminum. Both use the same TP1015 filter and Viton O-rings. Both carry the same $69.99 price. Choose Black for a stealth/OEM+ look, Silver for a polished machined finish. Performance is identical. Q: Will the black anodizing wear off over time? A: No. Type II (sulfuric acid) anodizing converts the aluminum surface into a hard aluminum oxide layer — it's not a coating or paint that can flake off. It resists diesel fuel, engine degreasers, road salt, and UV exposure. The only thing that will mar it is a slipped wrench — so use a properly sized 32mm socket. Q: Can I reuse the billet cap with future filter changes? A: Absolutely. The 6061-T6 cap is a lifetime upgrade. At each service interval, you only need to replace the filter element and O-rings. Grab our TP1015 filter-only replacement for $17.99 and keep the black cap in service indefinitely. Q: Will this aftermarket kit void my warranty? A: No. Under the Magnuson-Moss Warranty Act, using aftermarket parts does not automatically void your warranty. The iFJF TP1015 filter meets or exceeds all OEM filtration specifications, and the billet cap is an upgrade over a known failure-prone OEM component (documented in GM TSB #18-NA-103). 🛒 Related Products Prefer a brighter finish? Silver 134001 Billet Cap + TP1015 Kit — $69.99, polished machined aluminum with black trim Already have the cap? TP1015 Fuel Filter Only — $17.99, replacement filter element with Viton O-rings Need an air filter too? TP1015 + A3231C Air Filter Combo — $37.99, save on shipping with both filters in one order ⚠️ IMPORTANT: Always prime the fuel filter with clean diesel before installation. A dry-start on the CP4.2 high-pressure fuel pump can cause catastrophic failure — a $4,000+ repair you don't want.

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iFJF TP1015 Fuel Filter + A3231C Air Filter Combo — Two Filters, One Order, Zero Hassle Diesel maintenance shouldn't be a scavenger hunt. The iFJF TP1015 Fuel Filter & A3231C Air Filter Combo bundles the two most frequently replaced filters on your 2017–2019 Duramax 6.6L L5P into a single order at a single price. One box shows up at your door. One shipping charge. One service session to knock out both filters and get back on the road. Whether you're stacking miles towing a fifth-wheel, running hot-shot deliveries, or just keeping your daily-driver HD truck running clean, this combo saves you the headache of ordering twice — and the extra shipping that comes with it. 💰 Why Buy the Combo? Item Purchased Separately Combo Price TP1015 Fuel Filter $17.99 $37.99 A3231C Air Filter $29.99 Shipping (2 separate orders) $–$$ 📦 What's Included 🔹 TP1015 Fuel Filter Filtration: 5 micron absolute — captures 99.9% of particles ≥5μm Media: Multi-layer synthetic blend with hydrophobic water-separation barrier Water Separation: 98% efficiency — protects CP4.2 pump from cavitation damage O-Rings: 2 × Viton® fluoroelastomer O-rings (cap seal + filter seal), rated 400°F Replaces: ACDelco TP1015 · GM 22937279 · 23456595 · 23304096 🔹 A3231C Engine Air Filter Media: High-flow synthetic cellulose blend with progressive-density layering Pleat Count: Optimized for maximum surface area within OEM housing dimensions Seal: Molded polyurethane perimeter gasket — no air bypass, no unfiltered air reaching the turbo Replaces: ACDelco A3231C · GM 84262965 · WIX CA12258 · Baldwin LAF3231 · Purolator 33-5065 🚛 Compatible Vehicles Chevrolet Silverado 2500HD / 3500HD 2017 · 2018 · 2019 6.6L L5P Duramax Turbo Diesel V8 Fuel filter also fits 2020 model year GMC Sierra 2500HD / 3500HD 2017 · 2018 · 2019 6.6L L5P Duramax Turbo Diesel V8 Fuel filter also fits 2020 model year Note: A3231C air filter fits 2017–2019 model years only. 2020 models may use a different air filter housing design — verify before ordering. TP1015 fuel filter fits all 2017–2020 L5P trucks plus Chevy Cruze 1.6L/2.0L diesel (2014–2019). 🔢 Cross-Reference / Replaces OEM Part Numbers Fuel Filter: TP1015 · ACDelco TP1015 · GM 22937279 · 23456595 · 23304096 Air Filter: A3231C · ACDelco A3231C · GM 84262965 · WIX CA12258 · Baldwin LAF3231 · Purolator 33-5065 ⚙️ Technical Specifications Specification TP1015 Fuel Filter A3231C Air Filter Media Type Multi-Layer Synthetic Blend High-Flow Synthetic Cellulose Micron Rating 5μm Absolute N/A (Engine Air) Water Separation 98% Efficiency N/A Seal Type 2 × Viton® O-Rings Molded Polyurethane Gasket Service Interval 15,000–22,500 mi 15,000–30,000 mi (inspect at 15K) Installation Under-hood, filter housing Airbox, drop-in, no tools 🛠️ Installation Tips FUEL FILTER — PRIME FIRST: Fill the new TP1015 with clean diesel before threading it into the housing. The CP4.2 pump is lubricated by fuel — a dry filter means a dry pump on first crank. That's a $4,000+ mistake. FUEL FILTER — LUBE O-RINGS: Light coat of clean diesel or silicone grease on both Viton O-rings. Prevents pinching and ensures a clean seal. FUEL FILTER — TORQUE: 18 ft-lbs (25 N·m). Smooth threads — if you feel resistance, back off and realign. FUEL FILTER — BLEED: Key ON (don't start) 3–5 times. Listen for the in-tank pump to cycle and stop. Then crank. AIR FILTER — DROP IN: Unclip the airbox, lift out the old filter, drop in the A3231C, reclip. No tools. No wrestling. Takes 90 seconds. AIR FILTER — CHECK THE SEAL: Make sure the polyurethane gasket sits flush against the airbox sealing surface. Any gap = unfiltered air = dusted turbo. ❓ FAQ Q: What exactly is included in this combo? A: You get 1 × TP1015 fuel filter element (with 2 Viton O-rings) and 1 × A3231C engine air filter. That's it — two filters, one box. No cap, no housing, no gimmicks. Q: Do both filters need to be replaced at the same time? A: Not necessarily — the fuel filter is typically due every 15,000–22,500 miles, while the air filter can stretch to 30,000 miles in clean conditions. But if you're doing a major service interval anyway, or you can't remember when you last changed either one, replacing both at once eliminates guesswork. Q: Will this combo fit my 2020 Silverado 2500HD? A: The TP1015 fuel filter fits 2020 models without issue. However, the A3231C air filter is confirmed for 2017–2019 only — GM changed the airbox design on some 2020 L5P trucks. Verify your air filter housing before ordering, or grab the TP1015 fuel filter standalone if you're unsure. Q: Will aftermarket filters void my warranty? A: No. The Magnuson-Moss Warranty Act protects your right to use aftermarket parts. Both the TP1015 and A3231C meet or exceed OEM filtration specifications. As long as the filter itself doesn't cause a failure (which it won't), your warranty remains intact. 🛒 Related Products Just need the fuel filter? TP1015 Fuel Filter Only — $17.99, replacement filter element for existing cap owners Just the air filter? A3231C Air Filter Only — $29.99, high-flow drop-in engine air filter Upgrade your filter cap? Silver 134001 Billet Cap + TP1015 Kit — $69.99, CNC 6061-T6 aluminum, fixes the OEM plastic cap problem permanently Prefer stealth black? Black 134001 Billet Cap + TP1015 Kit — $69.99, same premium kit in black anodized finish ⚠️ IMPORTANT: Always prime the fuel filter with clean diesel before installation. A dry-start on the CP4.2 high-pressure fuel pump can cause catastrophic failure — a $4,000+ repair you don't want.

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2007.5-2010 Duramax LMM 6.6L EGR Valve & Cooler Delete KitHigh-quality Diesel Performance Parts replacement from iFJF. 2007.5-2010 Duramax LMM 6.6L EGR Valve & Cooler Delete Kit —.Key Features OEM-spec quality and fit Durable construction for long service life Direct replacement — no modifications needed Q: Is this OEM quality?A: Yes, manufactured to meet or exceed OEM specifications.Q: Fast shipping?A: Yes, ships from iFJF warehouse within 1 business day.

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Make Duramax Fuel Filter Changes Quick & Easy — Add This 1/2" Spacer Kit Anyone who's changed a fuel filter on a 6.6L Duramax knows the struggle: the filter is wedged tight against the intake manifold, making it a knuckle-busting, one-flat-at-a-time wrestling match every time. This 1/2" billet aluminum spacer kit relocates the entire filter head outboard, giving you the clearance you need for quick, frustration-free filter changes — every single time. What's in the Kit Part Material Purpose Spacer Plate ×1 Billet 6061-T6 Aluminum, Anodized Relocates filter head outward by 1/2" for tool clearance Bleeder Screw ×1 Billet 6061-T6 Aluminum, Anodized Upgrades fragile plastic bleeder — won't strip or crack Bolts ×4 Grade 8 Steel 2 short bolts (30mm thread, 2001–2010) + 2 long bolts (45mm thread, 2011+) 🚛 Vehicle Compatibility Fits all 2001–2017 GM 6.6L Duramax fuel filter housings: Chevrolet Silverado 2500HD/3500HD (2001–2017) GMC Sierra 2500HD/3500HD (2001–2017) Engine codes: LB7 · LLY · LBZ · LMM · LML (2001–2017) Kit includes BOTH short and long bolts — use short bolts for 2001–2010, long bolts for 2011+ 🛒 Choose Your Color Available in Blue, Red, and Gold anodized finishes — pick the color that matches your engine bay or just looks good to you. All colors use the same billet 6061-T6 aluminum with Type II anodizing for corrosion resistance. Why You Need This Spacer 🔧 Filter Changes That Take Minutes, Not an Hour — The stock filter head sits flush against the intake, leaving zero room for a filter wrench. With this 1/2" spacer, you get enough clearance to use a proper tool and spin the filter off in seconds. 🔧 Bleeder Screw Upgrade Included — You're already in there, so the kit includes our CNC aluminum bleeder screw. The stock plastic bleeder strips easily; this billet aluminum unit is a lifetime part that threads smoothly and seals tight every time. 🔧 Won't Affect Fuel Lines or Clearance — The 1/2" offset is carefully calculated. It won't stretch fuel lines, interfere with the hood, or cause any clearance issues. It just pushes the filter head out enough to get your hands and tools in. 🛠️ Installation Remove the two filter head mounting bolts from the intake manifold. Place the spacer plate between the filter head bracket and the intake manifold. Install the included bolts: use short bolts (30mm thread) for 2001–2010 trucks, long bolts (45mm thread) for 2011–2017 trucks. While you're in there, replace the plastic bleeder screw with the included aluminum unit. Torque bolts evenly to 18 ft-lb — do not over-tighten into the aluminum intake. Install a new fuel filter, prime the system, and you're done. Total install time: 15–20 minutes with basic hand tools. No fabrication, no fuel line modification, no check engine lights. ❓ Frequently Asked Questions Q: Will the 1/2" spacer cause clearance issues with the hood or engine cover? No. The 1/2" offset pushes the filter head toward the driver's side fender well, not upward. There is ample clearance in all directions — this spacer has been tested on stock and lifted trucks from 2001 through 2017 without any fitment issues. Q: Do I need longer fuel lines with this spacer? No. The stock fuel lines have enough flex and length to accommodate the 1/2" relocation without binding or kinking. The spacer works with factory lines on all Duramax years. Q: Can I use this spacer WITH the iFJF rebuild kit? Absolutely — and we recommend it. If you're already rebuilding the filter head with our seal rebuild kit, adding the spacer makes future filter changes faster. The two kits complement each other perfectly — rebuild the seals once, add the spacer, and enjoy easy filter changes for the life of the truck. Check out our complete Duramax filter head rebuild guide for step-by-step instructions. Q: Which bolt length do I use for my year? Short bolts (30mm thread): 2001–2010 Duramax (LB7, LLY, LBZ, LMM). Long bolts (45mm thread): 2011–2017 Duramax (LML). Both sets are included in the kit. Q: Does this spacer affect fuel pressure or cause air intrusion? No. The spacer sits between the filter head bracket and the intake manifold — it does not open the fuel system or affect any seals. Fuel flow, pressure, and priming behavior are completely unchanged. Your Duramax will run exactly as it did before, just with easier filter access.

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Fits model:2005-2016 GM Duramax Chevy Silverado/GMC Sierra 2500HD 3500HD V8 6.6L Diesel Engine LLY/LBZ/LMM/LML. Fuel filter cross reference:TP3018,TP3012,19305685,12664429,12633243,33960XE,LFF6012,1R-0750,BF7633,P551313,P551740,FF5320,MK13104,P8334,33528,CB01405912,LFF3347,3528. 12642623 filter head:Made of billet aluminum,we used the electrophoresis process to treat the surface of the base,protect it from rust and dust.Also includes a heater plug.The aluminum air bleeder screw which replaced plastic OEM screw was more durable.The hand fuel pump and two tubes were made of iron. 1R-0750 Refit Head:High-Flow,Increased Filtration and Lower Cost Filter Replacements,Billet Aluminum, Black Anodized CNC machined refit head designed to allow you to replace the poor-quality OEM filter with a superior quality spin-on filter element. Upgrade:We improved the process of the refit head's bolt,you don't need to remove the check ball and spring in the 12642623 fuel filter head anymore before combine the head and filter.

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  Fuel filter: Provide high flow rates and superior 99% filtration efficiency with a premium filtration 5 micron media to help improve engine performance. 1R-0750 Refit Head: High-Flow,Increased Filtration and Lower Cost Filter Replacements,Billet Aluminum, Black-Anodized CNC machined designed to allow you to replace the poor-quality OEM filter with a superior quality spin-on filter element. Compatible with:For Duramax 6.6L V8 2001-2016 Chevy Silverado/GMC Sierra 2500HD 3500HD Diesel Engine LB7/LLY/LBZ/LMM/LML. Cross reference: 1R-0750, BF7633, P551313, P551740, FF5320, MK13104, P8334, 33528, CB01405912, LFF3347, 3528. Package includes: 1 x fuel filter,1 x Refit Head with needed kits.

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Fitment:For GM Duramax 6.6L V8 2005-2016 Chevy Silverado/GMC Sierra 2500HD 3500HD Diesel Engine LLY/LBZ/LMM/LML. Package includes:1 x 12642623 Fuel filter head with pump,1 x 1R-0750 Refit Head with bolt and O-rings. 12642623 filter head:Made of billet aluminum,we used the electrophoresis process to treat the surface of the base,protect it from corrosion.Also includes a heater plug.The aluminum air bleeder screw which replaced plastic OEM screw was more durable.The hand fuel pump and two tubes were made of iron. 1R-0750 Refit Head:High-Flow,Increased Filtration and Lower Cost Filter Replacements,Billet Aluminum, Black-Anodized CNC machined Refit Head designed to allow you to replace the poor-quality OEM filter with a superior quality spin-on filter element. Upgrade:We improved the process of the Refit head's bolt,you don't need to remove the check ball and spring in the 12642623 fuel filter head anymore before combine these two parts.

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3-Pack 1R-0750 Secondary Fuel Filter for Duramax 6.6L / Cat D4E D6H3-pack value of 1R-0750 secondary fuel filters for 2001-2016 Duramax 6.6L (LB7 through LML) and Caterpillar D4E/D6H engines.Q: Primary or secondary?A: Secondary (final) filter — located on the engine. Replace every other oil change.

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Compatible with:Aluminum Adapter Refit Head for 1R-0750 Fuel Filter fits Duramax 6.6L 2001-2016 Chevy Silverado/GMC Sierra LB7/LLY/LBZ/LMM/LML engine. Function:High-Flow,Increased Filtration and Lower Cost Filter Replacements,Billet Aluminum, Black-Anodized CNC machined refit head designed to allow you to replace the poor-quality OEM filter with a superior quality spin-on filter element. Upgrade Bolt:We improved the process of the refit head's bolt,you don't need to remove the check ball on the 12642623 fuel filter head anymore before combine the head with this product. Advantage:Uses 2 Viton O-Rings and is 100% Biodiesel compatible,Helps Prolong Injector Pump, Injector, and Fuel System Life.Provides an easy method of installing either a 1-micron 100% microglass filter element or a CAT 2-micron filter element. Proposal:If installing on 2011+ trucks,it is recommended that you install a washer behind the filter head to offset the filter head by approximately 0.5" for increased access.

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3-Pack 1R-0750 Secondary Fuel Filter for Duramax 6.6L / Cat D4E D6H3-pack value of 1R-0750 secondary fuel filters for 2001-2016 Duramax 6.6L (LB7 through LML) and Caterpillar D4E/D6H engines.Q: Primary or secondary?A: Secondary (final) filter — located on the engine. Replace every other oil change.

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  Feature: Thread Size:M20x1.5(connect Refit Head),1-14 UNS(connect fuel filter).Material:Stainless Steel. Upgrade: We innovative improved the process of the refit head's bolt,you don't need to take away the check ball and spring in the 12642623 fuel filter head anymore before combine the fuel filter and head. Compatible with: 2001-2016 Chevy Silverado/GMC Sierra 2500 3500 Duramax 6.6L V8 Diesel Engine LB7/LLY/LBZ/LMM/LML. Install location: Connect the Fuel Filter Refit Head and the 1R-0750 Fuel Filter which replaces inefficient OE filter. Package contents:1 x Refit Head Bolt,2 x O-rings.

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Fitment: Fuel filter and Oil filter for Duramax 6.6L Chevy Silverado/GMC Sierra 2500HD 2001-2016, Chevy Silverado/GMC Sierra 3500 2001-2007. Replaces part number: Fuel filter: TP3018, TP3012, 19305685, 12664429, 12633243, 33960XE, LFF6012. Oil filter: 29539579, 29531007, 29537268, BT8460, P550606, HF35247, P9264, 57701, P1276, LFH8737. Fuel filter: Multi Layer Filter Media Design,Outer filter element 15 microns. Inner filter element 5 micron. Water separation efficiency 98%. Oil filter: This filter is the external spin on type for the shallow and deep pan transmission. Note: Please replace the filter regularly and don’t reuse old ones.

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  This filter is the external spin on type for the shallow and deep pan transmission Prevent abrasives other harmful particles from entering the vehicle,make the oil clean. Interchange Part Number: 29539579, 29531007, 29537268, BT8460, P550606, HF35247, P9264, 57701, P1276, LFH8737. Applies to Allison Transmission LCT 1000/2000/2400 series Compatibility LCT 1000/2000/2400 series Chevy Silverado/GMC Sierra 2500HD 3500 2001-2019 6.6L Chevy/GMC C2500 C3500 Pickups 2001-2003 6.6L Chevy Kodiak/GMC Topkick C4500 C5500 2001-2005 6.6L Hummer H1 2006-2007 6.6L Package include: 1pcs 29539579 Spin-on Oil Filter, 1pcs O-ring

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Fitment: Fuel filter Housing Cap for GM Duramax 6.6L L5P 2017-2020(Chevy Silverado/GMC Sierra 2500HD 3500HD),Cruze 2014-2015 2.0L,Cruze 2017-2019 1.6L. Replaces part number:134001. Material: Made of CNC Billet 6061-T6 Aluminum, more durable and longer using time than OEM cap. Advantage: This housing is engineered and manufactured to fit and function like the factory housing (while being much stronger),Won't easily to be cracked when installing/removing. Package includes:1 x fuel filter housing cap(Do not include O-ring),1 x drain plug.       Housing cover Our housing cap is carefully crafted with CNC billeted aluminum for longer-lasting durability and reliability.Your standard plastic cap would be easily cracked when over tightened or long term used.You can simply remove your old cap and screw your new cap on its place using a 1-7/16" socket wrench.Grooves on the side for easy removal and installation.

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iFJF A3231C Engine Air Filter — Keep Your Duramax L5P Breathing Clean Your 6.6L L5P Duramax moves a lot of air — upwards of 900 CFM at full boost. Every cubic foot of that air passes through the engine air filter before it hits the turbocharger. A clogged, cheap, or torn filter doesn't just choke power — it sends abrasive particulate straight into the compressor wheel, through the intercooler, and into your cylinders. The iFJF A3231C is a direct drop-in replacement for the OEM air filter on 2017–2019 Silverado & Sierra 2500HD/3500HD trucks. High-flow synthetic cellulose media. Precision-molded polyurethane perimeter seal. No tuning required. No fitment drama. Just cleaner air for a harder-working engine. 📊 iFJF A3231C vs. OEM ACDelco Air Filter Specification iFJF A3231C OEM ACDelco A3231C Filter Media High-Flow Synthetic Cellulose Blend Standard Cellulose Paper Media Layering Progressive-Density (Gradient) Single-Density Pleat Design Deep-Pleat, High Surface Area Standard Pleat Count Perimeter Seal Molded Polyurethane — No Bypass Foam / Rubber Gasket Airflow Restriction Low-Restriction at Rated CFM Standard Restriction Dirt-Holding Capacity Enhanced — Longer Service Life Baseline Price $29.99 $38–$55 🚛 Compatible Vehicles Chevrolet Silverado 2500HD / 3500HD 2017 · 2018 · 2019 6.6L L5P Duramax Turbo Diesel V8 GMC Sierra 2500HD / 3500HD 2017 · 2018 · 2019 6.6L L5P Duramax Turbo Diesel V8 ⚠️ Fitment Note: Confirmed for 2017–2019 L5P air filter housings only. Some 2020 models use a revised airbox design — verify your housing before ordering. Not compatible with 2011–2016 LML trucks. 🔢 Cross-Reference / Replaces OEM Part Numbers ACDelco: A3231C GM Genuine: 84262965 WIX: CA12258 Baldwin: LAF3231 Purolator: 33-5065 ⚙️ Technical Specifications Filter Media: Progressive-density synthetic cellulose blend — coarser outer layer captures larger debris (leaves, insects, gravel dust); finer inner layer traps sub-visible particulate before it reaches the turbocharger Pleat Geometry: Deep-pleat design maximizes surface area within the OEM airbox footprint — more media area means longer service life and lower restriction at high CFM demand Perimeter Seal: Molded polyurethane gasket forms a compression seal against the airbox sealing surface. No tape, no foam strips, no adhesive — just a clean mechanical seal that prevents unfiltered air bypass Airflow Design: Low-restriction media formulation tuned for the L5P's turbocharger demand curve — maintains rated airflow without sacrificing filtration efficiency Construction: Heavy-gauge expanded metal support mesh on the clean side prevents media collapse under high vacuum (heavy throttle, high altitude, or partially loaded filter conditions) Service Interval: Inspect every 15,000 miles. Replace at 30,000 miles under normal conditions, or every 15,000 miles if operating in dusty environments (gravel roads, construction sites, agricultural use) Installation: Drop-in — no modifications, no tuning, no special tools. Open airbox, lift out old filter, drop in A3231C, reclip. Under 2 minutes. 🛠️ Installation — 90-Second Drop-In OPEN THE AIRBOX: Release the 4 spring clips on the factory air filter housing. Lift the lid enough to access the old filter. REMOVE OLD FILTER: Pull the old filter straight out. Note which side faces up (the dirty side will be darker). INSPECT THE AIRBOX: Wipe out any debris, leaves, or sand from the bottom of the airbox with a shop rag. Check that the airbox drain hole isn't plugged. DROP IN THE A3231C: Seat the filter with the polyurethane gasket facing the clean-air side (toward the intake tube). The gasket compresses when you close the lid — that's your seal. CLOSE AND CLIP: Press the lid down evenly and re-engage all 4 spring clips. Give it a wiggle — the lid should be tight with no gaps. ❓ FAQ Q: Will this fit my 2020 Silverado 2500HD L5P? A: Maybe not. GM revised the air filter housing on some 2020 L5P trucks. The A3231C is confirmed for 2017–2019 model years. Check your existing air filter part number — if it's stamped A3231C or 84262965, this fits. If it's a different number, your truck may use the revised housing. When in doubt, grab our TP1015 fuel filter instead — that fits all 2017–2020 L5Ps. Q: How often should I replace the air filter? A: GM recommends inspection at every oil change and replacement at 30,000 miles. In practice, if you tow, drive gravel, or operate in dusty conditions (construction, agriculture, Southwest desert), replace every 15,000 miles. A $30 filter is cheap insurance against a dusted turbo or scored cylinder walls. Q: Will this air filter give me more horsepower? A: The A3231C is not a "performance" filter in the oiled-cotton sense — it's an OEM-spec replacement engineered for better filtration at equal or lower restriction. On a dyno, you won't see a horsepower gain. What you will get is cleaner intake air, longer turbo life, and the confidence that your filter media isn't collapsing under high boost. For a true high-flow upgrade on a tuned truck, aftermarket intake systems exist — but for a stock or lightly modified daily driver, this is the filter you want. Q: Will using an aftermarket air filter void my warranty? A: No. The Magnuson-Moss Warranty Act protects your right to use aftermarket replacement parts. The iFJF A3231C meets or exceeds GM's filtration and airflow specifications. As long as the filter itself doesn't cause a failure (and it won't — it's a direct dimensional and performance equivalent), your warranty is safe. 🛒 Complete Your L5P Maintenance Need the fuel filter too? TP1015 + A3231C Air Filter Combo — $37.99, both filters in one order, one shipping charge Just the fuel filter? TP1015 Fuel Filter — $17.99, 5-micron absolute filtration for your CP4.2 pump Upgrade your fuel filter cap? Silver 134001 Billet Cap + TP1015 Kit — $69.99, fix the brittle OEM plastic cap permanently 💡 TIP: A dirty air filter doesn't just hurt performance — it increases fuel consumption. A restricted filter forces the turbo to work harder to pull air, which the ECM compensates for with more fuel. Keep your A3231C clean, and your Duramax will return better MPG.

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