I just replaced the neutral safety switch on my camaro, i started it up drove it around for a while, then came back. I haven't been able to get it started since, and now if the parking brake is off when i try to start it, i turn the key over and the brake indicator light on the dash comes on. Any Ideas?

 

I found that when I replaced my NSS, the new one's plastic tab that inserts into the shifter was slightly shorter, and popped out the next time I shifted - pop the center console cover again and make sure it's still in the slot. I had to get pliers and bend the bracket some so that the plastic tab stayed in the shifter.

If that's not the issue, then might try replacing the starter enable relay - a bad relay will allow it to start on occasion, but not always. It's usually located behind the driver kick panel, under the black goo where the hood release latch is. Most NAPA's stock them for about $10.