GM Duramax LML - Grid Heater Throttle Valve Delete (2011-2016)
Type: Accessories
Eliminate intake restriction and restore smooth airflow. Designed for 2011–2016 6.6L Duramax LML trucks, this billet throttle valve delete replaces the factory grid heater throttle assembly that can restrict airflow—especially on tuned or modified setups. By removing this bottleneck, the intake path becomes more efficient, supporting improved throttle response and lower exhaust gas temperatures.
The factory throttle valve in LML Duramax applications can create unnecessary airflow restriction under load. This precision-machined billet aluminum replacement removes the stock valve assembly, allowing uninterrupted intake flow. Ideal for performance builds and tuned trucks, it’s a direct bolt-in upgrade that improves breathing efficiency without complicated modifications.
Vehicle Fitment
- 2011–2016 GMC Sierra 2500HD / 3500HD – 6.6L Duramax LML
- 2011–2016 Chevrolet Silverado 2500HD / 3500HD – 6.6L Duramax LML
Technical Specifications
| Product Type | Throttle Valve / Grid Heater Delete |
| Material | Precision-Machined Billet Aluminum |
| Finish | Raw Billet – Heat & Corrosion Resistant |
| Seal Type | O-Ring (Included) |
| Hardware | Mounting Hardware Included |
| Installation | Direct Bolt-In Replacement |
| Application | Tuned or Modified Duramax Builds |
What’s Included
- Billet aluminum throttle valve delete body
- O-ring seal
- Mounting hardware (bolts and fittings)
Features
- Solid billet aluminum construction for durability
- Removes restrictive factory throttle valve assembly
- Precision-machined for proper fit and sealing
- Includes sealing O-ring and hardware for straightforward installation
- Designed for improved intake airflow on performance builds
Benefits
- Improved throttle response and smoother airflow delivery
- Supports lower EGTs under load when properly tuned
- Increased reliability for modified or higher-boost applications
- Simple upgrade with noticeable drivability improvements
Installation Notes
- Direct replacement of factory throttle valve assembly.
- Professional installation recommended for tuned applications.
- Aftermarket tuning may be required for proper operation.
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.
