2001-2004.5 LB7 6.6L Duramax Return Line Kit
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2001-2004.5 LB7 6.6L Duramax Return Line Kit

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PRODUCT DETAILS

Maintain your fuel system with this 2001-2004.5 LB7 6.6L Duramax Return Line Kit. Designed for Chevrolet 6.6L Duramax applications, this replacement kit services the fuel return system and is a practical choice when you need to replace return-line components during injector or fuel-system work.

SKU MDPLB7RL
Make Chevrolet
Categories Return Line Kit
Year Range 2001 - 2004.5
Model 6.6L Duramax
OEM Part Numbers

No OEM part number is listed for this product.

Verify the existing component information and vehicle application before purchase.
Warranty

Covered by the Mississippi Diesel Products warranty against applicable manufacturing defects. See the Warranty Policy for complete terms and conditions.
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  • Replacement return line kit
  • Designed for LB7 6.6L Duramax applications
  • Fits 2001-2004.5 model years
  • Helps maintain proper fuel return flow
  • Suitable for fuel-system maintenance and repair
  • Useful during injector service
  • Application-specific replacement component

Fits:

  • 2001-2004.5 Chevrolet vehicles equipped with the LB7 6.6L Duramax

Engine: 6.6L Duramax
Engine Code: LB7

Verify your vehicle, engine, and existing return-line configuration before ordering.

Specification Details
Product Type Return Line Kit
Condition Replacement
Make Chevrolet
Engine 6.6L Duramax
Engine Code LB7
Model Years 2001-2004.5
Application Fuel Return System

FREQUENTLY ASKED QUESTIONS

This kit is designed for 2001-2004.5 Chevrolet vehicles equipped with the LB7 6.6L Duramax engine.

The return-line system routes excess fuel through the fuel system and helps maintain the intended fuel flow.

Replacement may be needed when the existing components are worn, damaged, or require service during injector or fuel-system repairs.

Yes. Worn or damaged return-line components can allow fuel to leak and should be replaced when their condition is compromised.

No. This kit is listed specifically for 2001-2004 5.7L 6.6L Duramax applications. Verify the engine code and model year before ordering.

Yes, professional installation is recommended to ensure the return-line components are properly fitted, and the fuel system remains sealed.