i know of a company that will do it somewhere in the mid western area, but dont have the name here with me. i will post it tommorow. chrome plating your stock wheels isnt always good though. they can pit and become dull and corroded in some areas. i would recomend going to a dealer and getting some factory chrome wheels and selling your old pair on this site or on ebay.
Contact Helen @ Transwheel: 800-892-3733. I did an exchange thru a GM dealer that had an account with Transwheel. They can'tdo the GM Bowtie Centers, but supply a nice smooth one. You can order GM option chrome centers: Front part # 15117281, Rear part # 15117282. I believe my cost was ~$1200 to $1300 exchange. I like the Full Chrome vs. the GM Option Chrome Face only. I get alot of compliments on my 04 Vltra-Violet.