1992 lumina z34

i got a 1992 lumina z34 where is the ecm located not the one under the hood the one tht gets all signals b/c my car won't satrt and i checked all the sensors and they were fine and i don't kno where tht is plzz help

are talkeing about the Ignition Control Module? if you are i think it's the same
as a 3.1 it's nuder the Exhaust Manifold on the side of the motor in the front
the coil's sit on top of it