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SKU DT660023


2004.5-2010 GM 6.6L Duramax LLY/LBZ/LMM

The DTech DT660023 Injector Return Line Kit for your 2004.5-2010 GM 6.6L Duramax can be used in place of the GM Fuel Return Line kits 97328733 and 98062291. While the GM kits are specific to right or left side, the DTech DT660023 kit can be used with the injectors on either side of your engine. This makes the DTech Kit an extremely affordable alternative to the expensive return lines you would get at the dealer.

The DT660023 includes the return adapters and o-rings, adapter retaining clips, and a length of return line hose sufficient for either engine side.


  • One Kit Per Bank (2 Required For Both Sides)
  • Affordable Quality Alternative To Expensive GM Parts 

DTech Warranty:

Consumer/Non-Professional Installers - 1 Year, Unlimited Mileage Warranty. 

Professional Shop / Automotive Truck Installers - 2 Years, Unlimited Mileage Warranty.

This warranty applies to product used under normal operating conditions and service. Repairs, modification, disassembly or any other alteration of DTech products from their original condition are not covered by this warranty. Warranty will not be extended to failures caused by incorrect installation or application, modification, contamination, negligence or abuse. The warranty does not extend to diagnostic time, incidental or consequential damages.

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