Well after diagnosing my cars problem for over a year I found the solution. The problem was when You start the car in the morning or after sitting for an hour it would always fire up but if you ran it for a few minutes shut it down then tried starting it up "Nothing". Wait an hour and it would fire right up or get a jump start from a running car and would fire right up. It was like it needed 13.8-14.4 to bridge gap creating resistance ,it would always start that way. Got alot of use out of my jumper cables. I replaced Starter 3 times,solenoid 3 times ,ignition switch, neutral saftey switch, VAT ignition cylinder, Vat keys,cleaned all grounds,replaced battery, but to no avail.I had it on my lift and when it started purple wire(ignition) had 12 volts then when you got the car warm and would not start it went down to 3- 6 volts? Weird. Unhooked the wire and it had 12 volts. Bad resistance. You could cross over solenoid and it would fire right up.I ran an 8 gauge wire from solenoid to battery so I wouldbe able to start it directly from battery which did work but really wanted to fix the problem right.I finally pulled the starter enable relay/VAT relay in drivers kick panel and replaced with new one and so far so good. GM Part # 14093107. This was $17.99. Bad news 1 day after fixing it car was almost stolen. See post. Stolen Car in History and restoration.? didn't know where else to post. Close to Cars almost History Until Reposession. LOL Hope this helps any of you with the same problem.