Personally, I found our hub size of 4.25" (aka "pilot diameter" in the above figure) as the biggest obstacle to finding proper wheels... Most big Chevy trucks use 3" hub and DO NOT fit on VX .
Thank you Leon R. The wheels I was planning on ordering online say "hub bore 106.10", which is 4.19". I called and they told me that it won't fit the 4.25" (108mm) hub.
Will a larger wheel hub be a problem (110mm to 125mm)?