Product Description
Fix return-side leaks the right way with the Exergy E05 10010 Leak Rail Assembly (Passenger Side). Designed for 2004.5–2010 Duramax LLY/LBZ/LMM platforms, this OE-style return (leak-off) rail restores proper fuel return function and helps eliminate rail wetness, hard starts, and fuel odor caused by cracked or fatigued components.
Key Benefits
- Direct-fit passenger-side leak/return rail for LLY/LBZ/LMM
- OE-style construction for reliable sealing and durability
- Ideal when servicing injectors, return lines, or chasing fuel leaks
- Exergy quality—built for longevity and daily drivability
Fitment
- Make/Model: Chevrolet Silverado 2500HD/3500HD; GMC Sierra 2500HD/3500HD
- Engine: 6.6L Duramax LLY (2004.5–2005), LBZ (2006–2007), LMM (2007.5–2010)
- Side: Passenger (RH) leak/return rail
What’s Included
- Exergy E05 10010 Passenger-Side Leak Rail Assembly
- Pre-assembled rail (transfer/replace seals as required)
Recommended Supporting Parts
While you’re in there, it’s smart to refresh related fuel-system components. For injector-related items, we’re linking to Exergy-only options:
- Shop All Exergy Performance
- Exergy Injectors:
- Injector/Return Line Seals & Gaskets
- Lift Pumps (Improve filtration & supply)
Install Notes
- Cleanliness is critical—cap lines, work on a cool engine, and keep debris out of fittings.
- Replace any brittle return hoses and seals during installation.
- After reassembly, prime the fuel system and check for leaks at idle and under light load.
Frequently Asked Questions
Q: How do I know my leak rail is failing?
A: Common symptoms include wetness around the rail/return lines, a fuel smell, hard starts, or visible seepage.
Q: Do I need to replace both sides at once?
A: It isn’t required, but many techs replace return-side components in pairs to avoid repeat labor.
Q: Will this fix injector return issues?
A: This rail addresses external leak/return hardware. If injectors have excessive return flow, consider fresh Exergy LLY, LBZ, or LMM injectors.
Q: Is tuning required?
A: No. This is a return-side component and does not require calibration changes.
Q: Warranty?
A: Covered by Exergy’s manufacturer warranty when installed per guidelines with clean fuel and proper sealing.
About Exergy Performance
Exergy is a leader in precision diesel fuel-system components for Duramax platforms and more. Explore the full lineup: Exergy Performance at CPP Diesel.
