Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, Wheel question in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; Is there any type of wheel shop that will modify 09 cts-v wheels to make them fit?...
Isnt this a better question to ask Google, or Bing, or Jeeves? Welding in custom drilled centers is something that a dedicated rim shop would have to do, not Les Schwab. You might consider looking for lug adapters, but I do not know if 5-lug to 6-lug adapters even exist. Once again, its a question for Google.
And to answer that question... no, I couldnt find any 5x115 to 6x115 lug adapters anywhere. Found a 5x114.3 or something, but I honestly dont think that will work in this case.