04.5-05 GM 2500/3500 DURAMAX LLY HIGH PRESSURE INJECTION LINE KIT

High Pressure Injection Line Kit | 2004.5–2005 Duramax LLY

Replace your entire high-pressure fuel injection line set in one shot with this complete kit from XDP. Engineered for the 2004.5–2005 GM 2500/3500 equipped with the 6.6L LLY Duramax, this kit includes all the lines needed to restore proper fuel delivery from the CP3 pump to your injectors — eliminating leaks, cracks, and pressure loss that rob your engine of power and reliability.

Why Replace Your Injection Lines?

High-pressure fuel lines on the LLY Duramax are subjected to extreme pressure cycles with every start and shutdown. Over time, lines develop micro-cracks, fittings corrode, and connections weaken — leading to fuel leaks, hard starts, rough idle, and loss of rail pressure. A full line replacement is the right call on high-mileage trucks or any time you're doing injector or CP3 work.

Features

• Complete high-pressure injection line kit — all lines included
• Restores proper fuel pressure from CP3 pump to injectors
• Eliminates leaks and pressure loss from worn or cracked OEM lines
• Direct fit for 2004.5–2005 LLY Duramax — no modification required
• Built by XDP, a leading supplier of diesel performance and replacement parts

Fitment

• 2004.5–2005 GM Silverado/Sierra 2500/3500 6.6L Duramax LLY

Whether you're chasing a fuel leak or doing a full fuel system refresh, this injection line kit gives your LLY a clean, reliable foundation.