89 irocz no start need help

i have an 89 irocz 305 tpi. i have replaced the ecm,prom,and lock key cylinder and the injectors still arent being grounded by the ecm dont know what else the problem could be any adviced would be appreciated

is the security light on when you try to start it?

Have you checked your starter relay or neutral safety switch? 89 is the first year for VATS in F-bodies and creates alot of diagnosis.