I'm not doubting these are factory Cadillac wheels but my Allante has aftermarket wheels whch look just like yours although I can't see your wheels really clearly in the pic. Do your wheels have the Cadillac emblems on the centercaps? And do they have grooves cut into the spokes? Both of those indicate factory wheels. Mine do not have either of those. My center caps have an emblem inside the wreath but not a Cadillac emblem and my wheels have no grooves in them.