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DHD 900-020 Replacement Oil Cooler Core Kit 2001-2016 6.6L Duramax

900-020 - 6B
Not Available
Pricing: $119.00


Do not overlook the engine oil cooler on your Duramax during engine service. These oil coolers are notorious for catching and storing both oil and coolant contaminates. DHD always recommends installing a new oil cooler during engine rebuilding or during internal component replacements. 

For 20 years replacing the oil cooler meant replace the entire $400 assembly with a GM service part. Now, you can install a fresh core in your original housing for a fraction of the cost!


  • Direct Replacement for OE Cooler Housings
  • 100% New Construction
  • Meets Or Exceeds OE Specs
  • Furnace Brazed 10 Plate Alloy Core
  • Includes Gaskets 

Gaskets Included:

  • 97358847
  • 12640849
  • 12640850
  • 97216175
  • 12631281 (Green Sealing Band)

Note: The seals in this kit are designed to reseal oil cooler case halves that utilize an o-ring. Some early LB7 and LLY trucks have an OE cooler that requires a flat single layer steel gasket. That gasket has been discontinued.

The green sealing band is found on replacement GM coolers 2001+ as well as 2012+ trucks. If you have a original equipment cooler on your early 2001-2010 trucks it might not required to green band seal.


  • 2001-2016 Duramax 6.6L




Shipping Information

  • Item Requires Shipping
  • 6.0 lbs.
  • W7.0000” x H7.0000” x L7.0000”

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