Fleece Duramax Oil Cooler Adapter, 2001-2007 LB7/LLY/LBZ



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Fits: 2001 thru 2007 Chevy Silverado/GMC Sierra 2500HD/3500HD LB7/LLY/LBZ Duramax Diesel

Upgrade your oil cooler mating surface with a new Fleece oil cooler adapter. The original equipment oil cooler adapter relies on a metal gasket on the oil cooler that over time is prone to leaking as the cooler flexes.

The Fleece Performance oil cooler adapter utilizes an integral square cut seal ring on the oil cooler mating surface in place of the leak prone gasket to provide a superior seal. Slotted mounting holes on one end allow for easier installation.


  • Improved seal 
  • Easy Installation 


  • Oil Cooler Adapter

Install Instructions