I was just reading a article in SPORT TRUCK April 2006 magazine about this topic. So I got curious and did a Google search on this topic. I found this article from GM supporting which vehicles can run on the 105 Octane E85 ethanol. Im not sure if my 2002 Z71 will, but I thought you all might like to see this.
Here is the link:
http://www.gm.com/company/onlygm/energy_flexfuel.html#
I wonder what the conversion would cost? Does any one know? Supposedly it would allow you to run normal pump gas and the E85.