Alarm problems
 

My 2004 chevy silverado ls 4.8l wont turn over. I replaced fuel pump it cranked over and started ran a little rough then i shut it off and tried to start it a few minutes after that and it wont turn over and the alarm goes off when i shut the door i programmed a new fob it unlocks and locks the doors but motor wont turn over now. Can anyone help me on what to try?