GM Duramax LML - CCV Upgrade Kit (2012-2016)
Type: Accessories
Control crankcase pressure. Protect your intake system. This CCV (Crankcase Ventilation) Upgrade Kit is designed for 2012–2016 6.6L Duramax LML trucks and replaces the restrictive factory crankcase ventilation assembly. By properly venting blow-by gases and removing the bulky OEM CCV box, this system helps reduce oil contamination in the intake while simplifying hose routing for a cleaner engine bay.
The factory CCV system routes oily vapors back into the intake tract, which can contribute to carbon buildup in the intercooler and intake piping over time. This billet aluminum upgrade improves ventilation efficiency and reduces internal crankcase pressure, supporting long-term engine reliability—especially on tuned or higher-mileage trucks.
Vehicle Fitment
- 2012–2016 GMC Sierra 2500HD / 3500HD – 6.6L Duramax LML
- 2012–2016 Chevrolet Silverado 2500HD / 3500HD – 6.6L Duramax LML
Technical Specifications
| Product Type | CCV (Crankcase Ventilation) Upgrade Kit |
| Material | Machined Billet Aluminum Plates |
| Finish | Black Anodized – Corrosion Resistant |
| Hose Routing | Simplified High-Temperature Hose Design |
| Installation | Direct-Fit Replacement of OEM CCV Assembly |
| Application | Reduces Crankcase Pressure & Intake Oil Contamination |
What’s Included
- Black anodized billet aluminum CCV plates
- High-temperature hoses with streamlined routing
- Hose fittings and clamps
- Installation hardware and instructions
Features
- Improves crankcase ventilation efficiency
- Helps prevent oil mist from coating intake components
- Removes the bulky factory CCV box for improved engine bay access
- Streamlined hose routing for cleaner installation
- Durable billet aluminum construction with protective anodized finish
Benefits
- Reduces long-term carbon and sludge buildup
- Supports improved throttle response and airflow efficiency
- Enhances reliability for tuned and high-mileage applications
- Creates a cleaner, more organized engine bay layout
- Practical upgrade for performance-oriented builds
Installation Notes
- Direct bolt-on design—no fabrication required.
- Professional installation recommended for modified applications.
- Ensure proper hose routing and secure fittings during installation.
Important Notes:
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Important Notices
- Off‑Road Use Only
Products sold by JS Speed are intended for off‑road use and may be illegal on public roads where emissions or pollution‑control laws apply. - Check Local Laws
Before purchasing or installing, verify all applicable local, state/provincial, and federal regulations to ensure the modification is legal in your area. - Professional Installation Recommended
These parts should be installed by qualified professional mechanics. Improper installation can cause performance issues or vehicle damage. Unless a product page explicitly states otherwise, installation instructions are not included. Components are designed for users with solid mechanical knowledge, and minor adjustments or modifications may be required for proper fitment. Returns or refunds cannot be accepted due to difficulty completing an installation or the absence of instructions. - Warranty Impact
Use of these parts may void your vehicle’s factory warranty. Confirm with your vehicle manufacturer before purchase and installation. - Limitation of Liability
JS Speed is not responsible for damage, failures, or issues arising from the use or installation of these products. - Product Images
Images are for illustration only and may differ from the actual product due to manufacturer updates or improvements. - No Performance Guarantees
While these products are designed to enhance performance, JS Speed does not guarantee specific performance results.
