If you own a 2017-2024 Chevrolet Silverado or GMC Sierra HD with an L5P Duramax engine, you might be wondering: How much does it cost to delete a L5P?
The L5P's emissions system often causes maintenance problems, so removing the L5P—removing these restrictive components—has become the preferred option for off-road enthusiasts. Below is a detailed breakdown of L5P delete costs, covering everything from kits to labor, to help you budget.
What Is an L5P Delete Kit?
An L5P Delete Kit is a specially designed kit to completely remove or disable the emission control system of an L5P Duramax engine. It's important to note that this modification is not for road use; it is only suitable for off-road or racing environments.
What Components Are Included?
A complete L5P Removal Kit typically includes:
- DPF Delete Pipe : Replaces the original particulate filter to improve airflow.
- EGR Delete Kit : Replaces the original EGR valve and cooler to eliminate carbon buildup during recirculation.
- Tuner : Used to reprogram the Engine Control Module (ECM) after hardware removal to make it ignore the missing emission components.
How Much Does It Cost to Delete an L5P Duramax?
The cost of removing an L5P Duramax engine depends on whether you do the installation yourself or hire a professional. Here is the average price range:
- Parts only : $1,000 – Over $2,000
- Parts + labor : $2,500 – Over $5,000
L5P Delete Cost Breakdown
To gain a comprehensive understanding of the cost of deleting an L5P, we break it down into three main categories: kit components, tuning, and labor.
1. L5P Delete Kit Costs
- DPF/CAT Removal Tube: $250 – $600
- EGR Removal Kit: $200 – $500
- Complete L5P Removal Kit: $500 – $1200. (Bundled kits are more cost-effective than purchasing components separately.)
2. Tuning Costs
Tuning/Removal Procedure Costs: $600 – $1000. (Depending on the tuning tools and services used.)
3. In-Shop Labor Costs
In-Store Labor Costs: $800 – $2000. (Depending on city/region, repair shop expertise, etc.)
| Item | Estimated Cost | Notes |
| Parts Only（DPF/EGR Delete） | $1,000–$2,000+ | Depends on brand & kit completeness |
| Full Delete Kit | $500–$1,200 | Most cost-effective option |
| Tuning | $600–$1,200 | Depend on the tuning tools and services used |
| Labor | $800–$2,500 | Depend on region and shop experience |
| Total (Parts + Labor) | $2,500–$5,000+ | Complete L5P Duramax delete |
Factors That Affect the Cost to Delete an L5P Duramax
1. Truck Model Year (2017-2025)
Newer models are generally more expensive. This is because GM has strengthened electronic safety measures in later L5P models (especially 2020 and later), making ECU unlocking more complex and costly.
2. Parts Brand and Quality
Kits of different brands and qualities will naturally have different prices. It is recommended to choose well-known brands like SuncentAuto, which generally offer high-quality materials and excellent customer service.
3. Tuning Type
Single tuning packages (for basic removal) range from $600 to $800, while multi-tuning packages (offering options for street, off-road, and trailer) range from $900 to $1200. If you frequently use your truck, a multi-tuning package is a worthwhile investment.
4. Local Labor Costs
As mentioned earlier, labor costs vary by region. Additionally, repair shops specializing in Duramax engines may charge higher fees.
5. Exhaust System Replacement
If you choose to replace the entire high-performance exhaust system (rather than just removing the exhaust pipes), the total cost is expected to increase by $500 to $1,500. This is a common upgrade for owners seeking maximum power gains.
Is Removing the L5P Engine Worth It?
Removing the L5P engine offers some benefits, but also some significant drawbacks. Please weigh the pros and cons carefully before making a decision.
Advantages:
- Performance Improvement : Removing the exhaust restrictions can result in a noticeable increase in horsepower and torque.
- Improved Fuel Economy : Eliminating the need for fuel-consuming DPF regeneration cycles can typically improve fuel efficiency by 2-5 mpg.
- Reduced Maintenance Costs : No need to replace clogged DPFs, faulty EGR valves, or purchase diesel exhaust fluid.
- Extended Engine Life : Removing the exhaust gas recirculation (EGR) and high-temperature exhaust gases reduces engine wear.
Disadvantages:
- Legal Issues : Removing the L5P emission control system violates federal emission regulations (EPA regulations).
- Warranty Expiration : Any emissions-related modifications will void your truck's original powertrain warranty.
- Failure to Pass Emissions Tests : You will be unable to pass any state-mandated emissions or smoke tests.
- High upfront costs : As mentioned above, this is a significant financial investment.
Legal Alternatives for the L5P Engine
As mentioned above, removing the emissions system is only permitted for off-road or racing; it's illegal on public roads. So, are there ways to improve vehicle performance without removing emissions control components? Yes, see the following options:
- High-flow intake system : Reduces intake drag and improves throttle response.
- High-performance intercooler : Reduces intake temperature and increases power density.
- CARB-compliant exhaust upgrades : Cat-back or axle-back systems that do not modify or remove DPF/DEF components.
- Enhanced maintenance : Regular professional DPF cleaning and EGR valve cleaning help maintain stock performance and reliability.
Frequently Asked Questions about L5P Delete
Conclusion: Final Summary of L5P Delete Costs
The cost of removing an L5P Duramax engine largely depends on parts, tuning, labor costs, and additional exhaust system upgrades.
- Total Parts Cost: $1,000 – Over $2,000
- Total Parts + Labor Costs: $2,500 – Over $5,000
While removing the L5P can significantly improve performance and reduce maintenance costs, it's crucial to remember that doing so is illegal on public roads. For everyday drivers, legal alternatives like CARB-compliant tuners and high-flow intake systems are safer. If you'll be using your truck exclusively for off-road or track use, a premium kit like SuncentAuto's L5P removal kit offers the best value and performance.
