ATS Diesel ATS Diesel 2004.5+ GM Trucks Fuel Rail Pressure Plug
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ATS Diesel 2004.5+ GM Trucks Fuel Rail Pressure Plug

ATS Diesel
ATS705-050-4290
7050504290
Fuel Pressure Regulators
20+ Units In Stock - Ships Next Business Day
$ 34.99
$ 34.99

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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