Hy glasman, the barrel bearings have not been made for decades, the only way to find those is lucking out finding N.O.S. ones, and then you have to find enough pieces to do at least one wheel, as you shouldn't mix and match. Most of the manufacturers made standard tapered roller bearing replacements for these, which carried the same part number as the Hyatt bearings. The numbers I came up with came from crossimg the GMC part numbers in a master bearing interchange catalogue. Could you please tell me which numbers are correct, you can P.M. if you like, thanks.
