GM question? Problem !!

A lady bought a 01 Camaro with a V6 and she has lost confidence in it as sometimes it will not start. Nice car but she can drive it for a while, to the store or down town and everything is fine but then she comes out of the store and gets in and tries to start it but no dice. It's an intermitant thing. It's been to the dealer and put on the computer but they cant find nothing on the codes. It sounds electrical and she's tired of giving these guys $75 just to look at it. That dont include the price of fixin it if they did find something wrong. Any ideas guys. I know on our Mopars the electronic box has jacked with me in the past. Is something getting too hot? Shoot me some ideas and i'll try and help the gal out of a bind. Thanks.......OH and go ahead and give me some GM raggin....I'm ready.
Small Block