Duramax owners often search for “PCV reroute kit,” “CCV reroute kit,” or engine-specific terms like “LBZ PCV reroute kit,” “LMM PCV reroute,” “LML Duramax PCV reroute,” and “L5P CCV reroute.” These searches usually come from one simple problem: truck owners want the correct crankcase ventilation solution for their exact Duramax engine generation.
A PCV or CCV reroute kit may look like a simple hose-and-fitting setup, but fitment can vary by model year, engine code, factory routing, intake layout, and whether the kit includes a catch can option. Choosing the wrong kit can lead to poor fitment, missing hardware, extra modification, or a frustrating installation experience.
This guide explains the key differences between LBZ, LMM, LML, and L5P Duramax PCV/CCV reroute kits, what to check before buying, and how to choose the right setup for your truck.
What Is a Duramax PCV/CCV Reroute Kit?
A PCV/CCV reroute kit is designed to change the way crankcase ventilation vapor is routed on a diesel engine. On many diesel trucks, factory crankcase ventilation systems can send oily vapor back into the intake tract. Over time, that oil mist can contribute to buildup inside intake components, especially on trucks that are used for towing, performance builds, or high-mileage driving.
A Duramax PCV or CCV reroute kit typically includes components such as:
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Oil-resistant hoses
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Fittings or adapters
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Clamps
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Plugs or caps
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Mounting hardware
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Optional catch can components
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Engine-specific routing parts
Some kits are simple reroute kits, while others include a catch can to help separate oil vapor before the air is vented or routed. The right choice depends on your truck, your build goals, and local emissions requirements.
Before purchasing, always review the product description carefully and verify whether the kit is intended for street use, off-road use, competition use, or specific applications only. Emissions-related rules can vary by location, so make sure the product is suitable for your vehicle and local regulations.
Why Engine Fitment Matters
Duramax engines are not all the same. Even though LBZ, LMM, LML, and L5P engines are all part of the Duramax family, each generation has different under-hood layouts, emissions equipment, intake routing, sensor locations, and factory ventilation designs.
That means a PCV/CCV reroute kit that fits one Duramax engine may not fit another. A kit made for an LBZ may not include the correct parts for an LML. A kit listed for an L5P may use different routing and connection points compared with earlier engines.
When shopping for a Duramax PCV/CCV reroute kit, do not rely only on the product photo. Always confirm:
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Vehicle year
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Engine code
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Truck model
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Kit type
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Included hardware
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Routing style
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Catch can compatibility
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Emissions-use notes
This is especially important if your truck has aftermarket intake parts, performance upgrades, or previous modifications.
LBZ Duramax PCV Reroute Kit Fitment
The LBZ Duramax is one of the most popular Duramax platforms among diesel truck owners. It is commonly found in 2006–2007 classic body style GM heavy-duty trucks. Many owners like the LBZ because of its strong performance reputation and relatively straightforward engine bay compared with later emissions-heavy models.
For LBZ Duramax PCV reroute kits, buyers usually care about clean hose routing, durable fittings, and a complete hardware package. Since many LBZ trucks are now high-mileage vehicles, it is also important to inspect existing hoses, intake boots, clamps, and related components before installing any new ventilation parts.
When choosing an LBZ PCV reroute kit, check for:
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LBZ-specific fitment confirmation
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Proper hose length for the engine bay
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Quality clamps and fittings
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Clear routing instructions
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Compatibility with aftermarket intake systems
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Optional catch can support
If you are searching online, terms like “LBZ PCV reroute kit,” “Duramax LBZ PCV reroute,” and “06 Duramax PCV reroute kit” can help narrow your options.
LMM Duramax PCV/CCV Reroute Kit Fitment
The LMM Duramax was used in 2007.5–2010 GM heavy-duty trucks. Compared with the LBZ, the LMM introduced more emissions-related components, which makes fitment details even more important.
Because the LMM engine bay layout differs from the LBZ, buyers should not assume that an LBZ kit will automatically fit an LMM. Some kits may cover both engine generations, but this should be clearly stated in the product listing.
For LMM PCV or CCV reroute kits, pay attention to:
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2007.5–2010 model year compatibility
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Engine-code-specific hose routing
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Clearance around intake and emissions components
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Included plugs, caps, and fittings
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Whether a catch can is included or optional
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Product notes about vehicle use and emissions compliance
A good LMM kit should make fitment clear. If a product description only says “fits Duramax” without listing the engine generation, it is worth checking more carefully before buying.
LML Duramax PCV Reroute Kit Fitment
The LML Duramax was used in 2011–2016 GM heavy-duty trucks. This generation includes more complex emissions and under-hood systems than earlier Duramax engines, so choosing the correct kit is especially important.
Many searches for “LML Duramax PCV reroute” come from truck owners who want a cleaner crankcase ventilation setup but do not want to guess which parts fit. Since LML trucks may have different routing needs compared with LBZ and LMM trucks, engine-code confirmation should be a priority.
When buying an LML PCV reroute kit, check:
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2011–2016 LML compatibility
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Correct routing for the factory engine layout
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Hose quality and oil resistance
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Proper fittings for the application
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Catch can option, if needed
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Clear installation notes
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Whether the kit is designed for specific vehicle configurations
If your LML has aftermarket intake parts or other engine bay upgrades, confirm that the kit will still work with your setup. Some kits are designed around factory layouts, while others may be more flexible for modified trucks.
L5P Duramax CCV Reroute Kit Fitment
The L5P Duramax is the newer 6.6L Duramax platform used in 2017+ GM heavy-duty trucks. Compared with older generations, the L5P has a more modern engine layout and different factory systems, so it typically requires L5P-specific parts.
Because of this, L5P CCV reroute kits should not be confused with LBZ, LMM, or LML kits. The hose routing, connection points, and included hardware may be different.
When choosing an L5P CCV reroute kit, review:
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2017+ L5P fitment notes
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Vehicle model and engine confirmation
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Included brackets, hoses, clamps, and fittings
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Clearance around factory components
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Catch can compatibility
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Whether the kit is designed for a stock or modified truck
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Product-use notes and emissions guidance
For L5P owners, the safest buying approach is to search by exact year, make, model, and engine. For example, “2020 L5P CCV reroute kit” or “L5P Duramax CCV reroute kit” will usually produce more relevant results than a generic “Duramax reroute kit” search.
LBZ vs LMM vs LML vs L5P: Quick Fitment Comparison
| Duramax Engine | Common Model Years | Kit Search Terms | Main Fitment Focus |
|---|---|---|---|
| LBZ | 2006–2007 | LBZ PCV reroute kit | Simple routing, hose quality, intake compatibility |
| LMM | 2007.5–2010 | LMM PCV reroute, LMM CCV reroute | Emissions-era layout, clearance, correct fittings |
| LML | 2011–2016 | LML Duramax PCV reroute | Engine-specific routing, complete hardware |
| L5P | 2017+ | L5P CCV reroute kit | Newer engine layout, L5P-specific parts |
This table is a starting point, not a replacement for checking the product page. Always confirm fitment before placing an order.
PCV Reroute Kit vs CCV Reroute Kit: What Is the Difference?
Many diesel truck owners use the terms PCV and CCV when searching for crankcase ventilation parts. In simple terms, both relate to managing crankcase vapors, but wording may vary by engine platform, product listing, and manufacturer.
For Duramax owners, the most important thing is not only the name of the kit. The most important thing is whether the kit matches your engine generation and includes the correct parts.
When comparing products, look beyond the title and check:
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Does the listing mention your engine code?
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Does it show compatible model years?
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Does it include all needed hoses and fittings?
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Does it include a catch can, or is that sold separately?
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Does the product description explain the routing style?
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Does the listing mention emissions or use restrictions?
A well-written product listing should answer these questions clearly.
Should You Choose a Catch Can Kit?
Some Duramax PCV/CCV reroute kits include a catch can, while others do not. A catch can is designed to help separate oil vapor from crankcase gases before they continue through the system. For some truck owners, this is a useful upgrade because it can help keep the routing cleaner and more controlled.
A catch can kit may be worth considering if:
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You want a cleaner crankcase ventilation setup
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Your truck is used for towing or heavy-duty driving
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You prefer a more complete system
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You want a serviceable component for oil vapor separation
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Your build has other supporting upgrades
However, not every owner needs the same setup. A basic reroute kit may be enough for some applications, while a catch can kit may be better for others. The right choice depends on your truck, your goals, and the kit design.
What to Check Before Buying a Duramax PCV/CCV Reroute Kit
Before ordering, use this checklist to reduce the risk of buying the wrong kit.
1. Confirm Your Engine Code
Do not buy based only on the word “Duramax.” Check whether your truck is LBZ, LMM, LML, or L5P. Engine generation is one of the most important fitment details.
2. Match the Model Year
Some Duramax generations overlap around body style changes. For example, 2007 model-year trucks can create confusion because of classic and newer body styles. Always confirm the exact year and engine.
3. Review Included Components
A complete kit should clearly show or list the included hoses, fittings, clamps, plugs, brackets, and hardware. If the listing is vague, compare it carefully before purchasing.
4. Check Catch Can Compatibility
If you want a catch can, confirm whether it is included in the kit or sold separately. Also check where it mounts and how often it may need service.
5. Look for Truck-Specific Fitment Notes
The best product listings make fitment easy by showing year, make, model, engine, and kit type. A vehicle search tool can also help narrow the correct parts quickly.
6. Review Emissions and Use Notes
Some crankcase ventilation products may have vehicle-use restrictions depending on location and application. Always read the product notes and follow applicable regulations.
Common Buyer Mistakes to Avoid
One of the most common mistakes is buying a kit based only on price or product photos. Many kits look similar online, but the small details matter. Hose length, fitting style, routing design, bracket placement, and included hardware can all affect fitment.
Avoid these mistakes:
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Buying a generic Duramax kit without checking engine code
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Assuming LBZ and LMM parts are always interchangeable
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Ignoring model-year split details
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Forgetting to check catch can compatibility
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Not reviewing included hardware
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Buying without checking emissions-use notes
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Overlooking aftermarket intake or engine bay modifications
Taking a few minutes to verify fitment can save time, money, and installation problems.
How to Search for the Right Duramax PCV/CCV Kit
When searching online, use specific phrases instead of broad terms. This helps you find the correct kit faster.
Good search examples include:
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“LBZ PCV reroute kit”
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“LMM PCV reroute kit”
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“LML Duramax PCV reroute”
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“L5P CCV reroute kit”
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“Duramax PCV reroute kit with catch can”
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“Duramax CCV reroute kit by year and engine”
If a website has a vehicle search tool, use it. Enter your year, make, model, and engine to filter products more accurately.
Final Thoughts
A Duramax PCV/CCV reroute kit is not a one-size-fits-all part. LBZ, LMM, LML, and L5P engines each have different fitment needs, and the right kit depends on your exact truck, engine generation, routing requirements, and build goals.
For LBZ owners, the focus is often clean routing and simple fitment. For LMM and LML owners, engine-specific layout and emissions-era components make fitment confirmation more important. For L5P owners, choosing a true L5P-specific CCV reroute kit is essential because the newer engine platform uses a different design than earlier Duramax generations.
Before you buy, confirm your engine code, check the model year, review the included hardware, and make sure the kit matches your intended use. A clear product listing, complete hardware package, and truck-specific fitment information can help you choose with confidence.
Whether you are searching for an LBZ PCV reroute kit, an LML Duramax PCV reroute, or an L5P CCV reroute kit, the best choice is the one that fits your truck correctly from the start.
FAQ
What is the best Duramax PCV/CCV reroute kit?
The best kit depends on your engine code, model year, and build setup. A good kit should clearly list compatible Duramax generations, include quality hoses and fittings, and provide the hardware needed for your application.
Will an LBZ PCV reroute kit fit an LMM?
Not always. LBZ and LMM trucks may look similar in some areas, but fitment can vary by engine layout and factory components. Always check whether the kit specifically lists both LBZ and LMM compatibility.
Does an LML Duramax need a specific PCV reroute kit?
Yes. LML trucks have different factory systems and under-hood layouts compared with earlier Duramax engines. It is best to choose a kit that clearly lists LML fitment.
Is an L5P CCV reroute kit different from older Duramax kits?
Yes. The L5P is a newer Duramax platform and typically requires L5P-specific routing, fittings, and hardware. Do not assume older LBZ, LMM, or LML kits will fit.
Should I choose a Duramax PCV reroute kit with a catch can?
A catch can can be useful for owners who want a more complete crankcase ventilation setup. However, the right choice depends on your truck, your driving use, and whether the kit is compatible with your engine generation.
How do I know which Duramax engine I have?
Check your truck’s model year, VIN information, owner documents, or engine identification details. You can also use a vehicle fitment tool on a parts website to search by year, make, model, and engine.