security light 2

how hard is it to install a bcm in a 01 olds intriq, and what all will it take care of in a car? I know its a sm computer that does alot of operations for a car,but would that cover everything with the security light on??

Not hard to replace, but it will need to be set up with a Tech 2 scanner and the theft system will need to be relearned. The ignition lock cylinder and the IPC can also cause the security light to come on, so can a wiring issue. Best to have the code read and then diagnose.