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GM 12678318 Duramax L5P Engine Oil Cooler Assembly 2017-2019

12678318 - Z
Was: $424.93
Sale: $299.00
Save: 30%
Save: $125.93

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This is a genuine GM OEM Duramax Diesel L5P Engine Oil Cooler Assembly.

The Duramax engine oil cooler is not normally a component that goes bad, however, it should be replaced after any catastrophic engine failure or during any performance engine builds.

The factory oil cooler has a stack plate design which makes cleaning any debris out nearly impossible. This is the reason we always recommend replacing the oil cooler. A defective engine oil cooler is also a major source for coolant/oil cross contamination. Check your coolant degas bottle for a layer of oil. If any appears, it is often defective oil cooler.


2017-2019 Vin "Y" L5P Duramax 2500/3500 Silverado/Sierra

Note: Gaskets Not Included



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  • Item Requires Shipping
  • 12.0 lbs.
  • W9.0000” x H10.0000” x L10.0000”
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