Description
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
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Filtration: 5 micron absolute — captures 99.9% of particles ≥5μm
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Media: Multi-layer synthetic blend with hydrophobic water-separation barrier
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Water Separation: 98% efficiency — protects CP4.2 pump from cavitation damage
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O-Rings: 2 × Viton® fluoroelastomer O-rings (cap seal + filter seal), rated 400°F
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Replaces: ACDelco TP1015 · GM 22937279 · 23456595 · 23304096
🔹 A3231C Engine Air Filter
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Media: High-flow synthetic cellulose blend with progressive-density layering
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Pleat Count: Optimized for maximum surface area within OEM housing dimensions
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Seal: Molded polyurethane perimeter gasket — no air bypass, no unfiltered air reaching the turbo
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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).
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🔢 Cross-Reference / Replaces OEM Part Numbers
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Fuel Filter: TP1015 · ACDelco TP1015 · GM 22937279 · 23456595 · 23304096
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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
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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.
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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.
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FUEL FILTER — TORQUE: 18 ft-lbs (25 N·m). Smooth threads — if you feel resistance, back off and realign.
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FUEL FILTER — BLEED: Key ON (don't start) 3–5 times. Listen for the in-tank pump to cycle and stop. Then crank.
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AIR FILTER — DROP IN: Unclip the airbox, lift out the old filter, drop in the A3231C, reclip. No tools. No wrestling. Takes 90 seconds.
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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
⚠️ 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.
