I use a ACDelco PF457G filter when I do an oil change. A lot of times I find the top is opened on a new filter. I always thought the large O ring for the cap came included and people where taking it out of the box. I found by Google that the filter with the seal is PF478G. Just to pass this on.

 

 

Every filter (not ACDelco) I ever bought included the filter O-ring. You can get a new cap, it probably comes with one.

 

Fwiw.
Years ago, when I got my SS, I was one of "those" people who would open up the filter boxes and take a look. None of the AC Delco filters came with the O-ring.
All the other brands had one in the box.
I wonder if some of the people who buy the AC Delco filter will take the O-ring from another brands box ?

 

This!

 

Maybe that's because GM never mentions changing the O-ring, onl;y when replacing the cap.-

 

Most likely so Don. Just wonder why all the other companies felt the need to include the O-ring.

Tid bit. Since GM changes vendors(parts makers) on a regular basis, that AC Delco could be made about anywhere. I remember some of those AC Delco oil filters I looked at long ago were made in Hungary.

 

I used to have the parts guy open the box & if it didn't have an O-ring, I would have him open other boxes & get me one.

And the kicker is: I'm still using the OEM O-ring, but have a nice collection of O-rings. And the AC Delco's I used to use were stamped Made in USA.

 

No mystery here.
AC Delco and most of the other brands, packages these oil filters 3 different ways under 3 different part numbers.
The filters only are also sold as packs of 6 or 12 under 2 more part numbers.


Engine Oil Filter
Part Number: PF457G
Product Notes:
Engine Oil Filter
All; Filter Only

Engine Oil Filter Kit
Part Number: PF457GO
Product Notes:
Engine Oil Filter Kit
All; INCLS SEAL

Engine Oil Filter
Part Number: PF458G
Product Notes:
Engine Oil Filter
All; INCLS CAP & SEAL

This is copied from the A/C Delco catalog

It fits all these 204 models of vehiclesBuick(31)2010-2017Chevrolet(78)2002-2017GMC(14)2010-2017Oldsmobile(3)2002-2004Pontiac(30)2002-2010Saturn(48)2000-2010

 

That's leaving out Saab, Opel etc.