I have no first hand knowledge of this situation. But a quick Google search turned up this.
http://cgi.ebay.com/ebaymotors/Cable-X:-Electronic-To-Mechanical-Speedometer-Drive-GM_W0QQitemZ330373245397QQcmdZViewItemQQimsxZ20091101?IMSfp=TL091101143002r3242
It's for a snap-on cable like it says, but I'm sure adapters exist. Anything is possible. All it takes is MONEY!
Link isn't working- heres the item # 330373245397
Last edited by k10; 11/02/2009 1:50 PM.