I just came across this also. Amsoil makes a kit which is Part #: BMK27 This is specific to your Duramax and offers a better filtration system. These normally run $409.00 through Amsoil. I will PM you with pricing on this, I am able to get this and you can read here the benefits of the unit.

http://www.amsoil.com/shop/by-produc...?code=BMK27-EA