colts 99 trans am

hey guys i need help i swapped a 98 ls1 m6 drive train into my 01 firebird and now i cant get it to turn over the security light was on and flashing so i did the vats mod now it stopped flashing and is just on.i tried to swapped the bcm out of the 98 but didnt make a difference so i put the other one back in and tried to rest it. but same thing. i did use the 98 wiring harness and repin it to works. is it possible the 98 computer is messing it ? or something else any help would be awesome thank you !

joecar

What PCM are you using...?

Why did you use the 1998 harness...?

colts 99 trans am

i am using the pcm out of the 98 camaro and i am using the 98 harness because it was from the donor car