1996 blazer will not start

Hello people,
 
I have a 1996 blazer that was running well and now it will not start.  Twice in the past month it was hesitating while driving for a few minutes and now it will not start.  I can smell the gas and I had the fuel pump changed last month.  I replaced the crank shaft position sensor and it still is not starting, just cranking over.  Any ideas?
 
Thanks
Brad