1991 firebird wont crank when you turn the key installed a new battery and everything else works fine it just won't do anything when you turn the key and after a few tries the security light comes on?

see if the fuel switch needs reset located in the rear of the car (trunk or behind backseat)

It is your VATS security system.You can spend $400 at a dealer or get someone to bypass the system.It is a little complex to explain how to do it.