I was in Advance Auto today to pick up some cleaner and as I was going by the oil filter shelf I decided to take a look at the AC filters. I opened several boxes and sure enough, these filters are definitely NOT made by Champion. The spot welds on the baseplate told me right away these were not Champion filters. I'm not sure if Wix uses spot welds or not, it's been so long since I looked at a Wix filter. I suppose these AC filters could be made by Delphi, the OEM arm of GM that makes the AC filters that are put on engines at the factory.
As an aside, the AC filters I looked at the last time I was in AutoZone definitely were made by Champion.
As an aside, the AC filters I looked at the last time I was in AutoZone definitely were made by Champion.