2011-2016 6.6L Duramax LML CCV/PCV Delete/Reroute Kit for Chevy Silverado/GMC Sierra 2500/3500 HD

6.6L Duramax LML PCV/CCV Reroute Delete Kit for 2011-2016

This CCV/PCV reroute delete kit is designed for 2011-2016 6.6L Duramax LML trucks and offers a simple, effective way to redirect crankcase vapors away from the factory intake path. It helps reduce oily residue, supports a cleaner engine bay, and provides a practical upgrade for high-mileage work trucks, tow rigs, and daily-driven diesel pickups.

Why LML Owners Upgrade the Factory Crankcase Vent System

First, understand how CCV works: The CCV system is a closed loop that redirects "blow-by gas"—containing oil vapor, unburned fuel, and combustion byproducts from the engine crankcase—back into the intake system for re-combustion. This is done to meet environmental regulations, but it creates hidden dangers for the engine.

1. Pollution of core components: Oil mist continuously adheres to components such as the intercooler and intake manifold, reducing heat dissipation and intake efficiency.

2. Carbon buildup: At high temperatures, oil vapor decomposes into stubborn carbon deposits, clogging the intake manifold → reduced intake volume → decreased power and increased fuel consumption.

3. Exacerbated problems under high loads: LML trucks that frequently tow heavy loads, engage in high-intensity operations, or travel high mileage experience faster carbon buildup and more noticeable performance degradation.

Therefore, many owners upgrade to a CCV rerouting system: directly expelling the blow-by gas (instead of redirecting it into the intake), completely blocking the oil contamination path, restoring power, reducing fuel consumption, and extending the life of the turbocharger and intercooler.

Helps Resolve Common PCV/CCV Related Issues

Data shows that original crankcase ventilation problems are related to oil stains and carbon buildup, crankcase seal leaks, and blue smoke from residual oil combustion. By rerouting the crankcase exhaust, this kit aims to address the root causes of these common LML Duramax engine malfunctions.

Reduces Cleaning and Replacement Costs

When oil and gas continuously circulate in the intake system, contaminants accumulate in components such as the intercooler, intake manifold, turbocharger, and throttle body. This rewiring/removal device helps reduce these buildup, thus lowering cleaning and replacement costs in the long run. Cleaner Engine Compartment

Lower crankcase pressure helps reduce oil leaks and oil mist, meaning the engine compartment and chassis will remain cleaner over time. Sealed joints and hoses also help prevent backflow and debris from entering the system, giving you greater peace of mind during work, trailer, and off-road use.

Durable Materials for Diesel Trucks

This 6.6L Duramax LML CCV Delete Kit is constructed from 6061 aluminum billet, stainless steel, and reinforced rubber, designed for long-term durability. CNC-machined and anodized finishes contribute to improved corrosion resistance and installation quality in demanding diesel applications.

Worry-free After-sales Service

• Free Shipping within the US
• Professional Online Technical Support
• Multiple Contact Methods Available (Phone, Email, etc.)
• 45-Day No-Questions-Asked Return Policy, Making Your Shopping Risk-Free

Installation and Tuning

Installation Time: Approx. 45 minutes.

Required Tools: Basic hand tools (e.g., socket wrench, screwdriver, pliers), safety gloves, and WD-40 or similar lubricant for the connections.

Installation Notes:

• Cool the engine to ensure safe operation.
• Locate and carefully remove the original PCV hose and valve body from the engine.
• Clean the mounting surface, install the CNC-machined metal plug, and tighten it to the required torque to ensure a perfect seal.
• Install the adapter at the engine outlet and connect the diversion hose.
• Run the hose safely under the vehicle, such as along the frame or transmission, and secure it with cable ties, ensuring it is away from high-temperature or moving parts such as the exhaust pipe and driveshaft.
• Start the engine and check that all connections are properly sealed and leak-free.

Tuning:

This modification is a physical modification, and no ECU tuning or programming is required after installation.