[PF63A(19330000, 12684608, 12690385, 19381670, 19387941, 19422677,19363567)]Ac Delco oil filter(made in China)

 

So if you reading this you have probably had issues with getting Ac Delco PF63 oil filters for your 6.6L Duramax diesels. This is an issue related to the 1st Brands bankruptcy which included Champion Labs which was a large US based filter manufacturer(Luberfiner along with many OE brands). They have since released a PF61A which is Delco's value line (these filters are made in China). Below is a link to a good comparison.

https://bobistheoilguy.com/forums/threads/acdelco-pf63-old-and-pf63a-new-comparison.406989/

 

we do have other options made in the US.

https://www.dieselfiltersonline.com/search/pf63

 

From what I've been told AC Delco is in the process of changing suppliers.  Mann & Hummel(owns Wix and Purolator) is supposed to be picking up much of their domestic filter production.