SKU: 705-050-4290 / UPC: 7050504290
ATS Diesel Fuel Rail Pressure Plug for 2004.5–2010 GM Duramax 6.6L (LLY / LBZ / LMM)
The ATS Diesel Fuel Rail Pressure Plug seals the factory fuel rail pressure sensor port on 2004.5–2010 GM Silverado and Sierra 2500HD/3500HD trucks equipped with the 6.6L Duramax diesel engine (LLY, LBZ, and LMM).
This billet aluminum plug allows for the installation of aftermarket fuel pressure gauges or regulators while maintaining fuel system integrity under high pressure. It is an essential component for tuned or modified Duramax trucks that require monitoring or control of fuel rail pressure.
Key Features
- Billet 6061-T6 Aluminum Construction – Strong, lightweight, and highly resistant to corrosion and extreme pressures
- Viton O-Ring Seal – Provides a reliable, leak-proof seal that withstands fuel exposure and pressures up to 30,000 PSI
- Direct Fit Design – Matches OEM port dimensions with no modifications or adapters required
- CNC Machined Precision – Ensures perfect threading and seating to prevent pressure loss or contamination
- Performance Engineered – Supports high-horsepower builds and fuel system upgrades
Specifications
| Detail | Value |
|---|---|
| Brand | ATS Diesel |
| Type | Fuel Rail Pressure Plug |
| Compatibility | 2004.5–2010 GM 2500HD/3500HD 6.6L Duramax (LLY, LBZ, LMM) |
| Material | 6061-T6 Billet Aluminum |
| Seal | Viton O-Ring |
| Country of Origin | United States |
| Warranty | ATS Diesel Limited Lifetime Warranty |
Whats Included
- ATS Diesel Fuel Rail Pressure Plug
- Viton O-Ring
- Installation Instructions
Product Notes
- Inspect the fuel rail port for debris before installation to ensure a proper seal
- Compatible with both stock and aftermarket fuel pressure sensors or regulators
- Professional installation recommended
This Part Fits
| Year Range | Make | Model | Engine |
|---|---|---|---|
| 2004.5–2005 | Chevrolet / GMC | Silverado / Sierra 2500HD / 3500HD | 6.6L Duramax LLY |
| 2006–2007 | Chevrolet / GMC | Silverado / Sierra 2500HD / 3500HD | 6.6L Duramax LBZ |
| 2007.5–2010 | Chevrolet / GMC | Silverado / Sierra 2500HD / 3500HD | 6.6L Duramax LMM |
Why Choose ATS Diesel?
- Over 20 years of experience engineering precision diesel fuel system components
- Manufactured in the USA with strict quality control standards
- Designed for both daily driving and high-performance applications
- Backed by ATS Diesel’s limited lifetime warranty on manufacturing defects
Frequently Asked Questions
- Q: Will this plug fit my 2006 GMC Sierra 3500HD Duramax?
- A: Yes, it fits all 2004.5–2010 GM 2500HD and 3500HD trucks with the 6.6L Duramax LLY, LBZ, and LMM engines.
- Q: What material is the plug made from?
- A: It is CNC-machined from billet 6061-T6 aluminum with a Viton O-ring for excellent fuel resistance and durability.
- Q: Do I need to tune my truck after installing this plug?
- A: No tuning is required for the plug itself. However, if you are installing an aftermarket fuel pressure gauge or regulator, tuning may be needed depending on your goals.
- Q: What torque should I use when installing this plug?
- A: Torque the plug to 18–22 ft-lbs using a 1/2″ crowfoot wrench.
Shipping & Handling
- Method: UPS Ground or USPS Priority Mail
- Availability: In stock – ships same or next business day
- Packaging: Protective padded envelope (6″ x 4″ x 1″)
- Weight: 0.1 lbs
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