Product Description
Restore proper common-rail performance on your LLY with the Exergy E06 10250 Left Fuel Rail. Built to OE specs by Exergy Performance, this driver-side rail is a direct replacement for 2004.5–2005 GM Duramax 6.6L LLY trucks and is engineered for reliable sealing and consistent rail pressure.
Key Benefits
- Direct-fit left (driver-side) rail for LLY applications
- OE-style construction and port geometry for proper flow and sealing
- Ideal when repairing leaks/contamination or refreshing high-mileage fuel systems
Fitment
- Make/Model: Chevrolet Silverado 2500HD/3500HD; GMC Sierra 2500HD/3500HD
- Engine: 6.6L Duramax LLY
- Years: 2004.5, 2005
- Position: Left / Driver Side
What’s Included
- Exergy E06 10250 Fuel Rail – Left (driver side) for LLY
Recommended Supporting Parts
Complete your repair or refresh with matched Exergy components and related hardware:
- Shop All Exergy Performance
- Exergy LLY Injector Sets (choose flow level):
- Exergy Leak Rail Assembly – Passenger Side (LLY/LBZ/LMM)
- Shop All GM Duramax Parts & Subcategories
Install Notes
- Inspect/replace injector lines and sealing washers if damaged or corroded.
- Thoroughly clean/flush the high-pressure system if contamination is suspected.
- Follow factory torque specs and tightening sequence from the service manual.
Frequently Asked Questions
Q: How do I confirm this is the correct side?
A: This listing is for the left (driver-side) rail on LLY trucks.
Q: Do I need to replace sensors or the relief valve?
A: Reuse good-condition OE components or replace as needed. If the system saw contamination, replace affected parts and lines for best results.
Q: Should I upgrade injectors at the same time?
A: If you’re chasing balance rates or planning power upgrades, Exergy-brand LLY injectors pair well with a refreshed rail. See the Exergy LLY options linked above.
About Exergy Performance
Exergy is a leader in precision diesel fuel system components for Duramax platforms and more. Explore the full lineup here: Exergy Performance at CPP Diesel.
