Injector #3 and #6 Line

Features

• Direct replacement high-pressure fuel lines for cylinders #3 and #6

• Designed specifically for 2004.5–2005 GM 6.6L Duramax LLY engines

• Eliminates potential flow restrictions caused by factory routing

• High-quality construction for reliable, long-term performance

• OE-style connections ensure a secure and leak-free fit

• Manufactured by Fleece Performance Engineering

• Replaces GM Part #97378826

Optimized Fuel Delivery for Cylinders #3 and #6
The Fleece FPE-FL-LLY-36 Injector Line is engineered to replace the factory fuel lines for cylinders #3 and #6 on your 2004.5–2005 Duramax LLY. These specific injector lines often experience restricted flow due to their factory design and routing. Fleece's redesigned lines improve fuel delivery and ensure consistent performance under load, towing, or everyday driving conditions.

Precision-Built for Duramax Reliability
Built to OEM specifications with enhanced flow characteristics, these injector lines offer a seamless fit and long-lasting durability. Whether you're refreshing your fuel system or troubleshooting injector-specific issues, this set delivers the quality and performance you've come to expect from Fleece Performance.

Package Includes

• (1) Injector Line for Cylinder #3

• (1) Injector Line for Cylinder #6

Fitment
2004.5–2005 Chevrolet Silverado / GMC Sierra 2500HD & 3500HD 6.6L Duramax LLY

Warranty
Manufacturer-backed limited warranty. Contact us for full details.

Fitment Notes

• For LLY engines only (mid-2004 to early-2006 models)

• Not compatible with LB7, LBZ, or newer Duramax engines

• Designed for use with factory-style injectors and fuel systems