Now the car will not start? Code P0355

Hey, my friend, I don't know if it was programmed. I bought it used from a parts store offline. Ebay and just put it in my car.
The security lockout light is blinking now. Before I changed BCM it was not blinking it was just on.

How do I program it?

Okay, thank you.

Hey, my friend, I hope all is well. I got the vehicle running, it was wiring negative wire burnt out on the BCM was replace car runs good, but after only driving 40 minutes this code came up P0420.