LS OEM Center Bore

[Bps5747]

I have recently purchased some wheel spacers for my 2002 LS with stock 17" chrome aluminum wheels. I ordered the spacers and they said I had the center bore of my wheel wrong. Its a stock wheel so I was trying to figure out what the center bore size was ?? I have read its a 63.9" but idk if that's correct, any other thoughts??