1999 Cadillac carteria body control module location
Body Control Module, located under dashboard,
left side ( driver side), have to un assemble the
fuse cover, then move slightly other kind of carbord
or paper cover , then you can
introduce your hand, through the left side or column
and you will fill a box, some times humidity may affect
and you will have radio goes on and off, trunk will not
open so as the gas fill door will not open at all (if this
happens, you have to enter trunk via the rear seat,
pull the emergency trunk opening , then go to trunk side
open the back right side, and introduce your hand where
the gas fill door lock (solenoid) , and pull the lock slightly
back, this will unlock the door and allow you to fill some
gas,, other wise you have to turn on and off your car
unitl it works ,, This problem I have associated it with
rust formation on terminals and bad car battery , you may
need to replace the battery.
You may have it removed and check by special electronics
shop that may open and clean and re build the contactors, or replace it with the same model, it has to be the same car year, check the model,,
I have a 1999 Catera, and have experimented a lot of things..
but its a good car