Welcome. The BCM is under the left side of the dash above the fuel pedal.
I need to ask a follw up question how do i do that?
would I need to replace it if I changed all the relays associated with it if my interior dome lights, reverse lights and dash borad lights flicer then come back on with a sercurity light in the message center?
Chances are very good. The Body Control Modules are known for issue such as flickering lights.
It does control all the times you indicated.