I finally got the cruise control using a GM module working and it works great. Thanks Marty. If anyone is interested I posted pictures and wiring diagrams to a page on my web site.
http://www.somewhereinusa.x10.mx/cruise.html (http://www.somewhereinusa.x10.mx/cruise.html)
Dick
WOW! This is awesome. Beats the heck out of the 2x2 that I use. :D
Neat project! Cruise control is on my "want" list.