OK here's a good one...
Every once in a while, my Aveo will not Crank. Now here is the funny part, to get it to Crank and Start, I open and close the back door.
What does that have to do with the issue??
Last time it happened, opening and closing the door was not effective but "flicking" those rubber boot covered switches a couple of times in the back door frame did fix it.
I know if I don't get to the heart of this issue it is going to let me down sometime and be a real no-start issue...