ECM location

V8 front wheel drive automatic.

I have heard it is behind the glove box, but I want to be sure. There were two modules I could see there but the part numbers corresponded to the airbag module and climate control module.

There were wires with warnings about not probing due to the airbag module being connected, so I did not want to look any further.

Is the PCM the other silver box up and behind the airbag module? If so, is it okay to disconnect those wire harnesses in the way? It will not engage the airbag.

Any tips on what size socket is needed and where all the bolts are keeping the PCM attached?

I need to remove the PCM to install a memory chip adapter so I can do some real-time tuning with a Moates emulator.

Thanks!

1985 Cadallic sedan deville 401 engine. Where is the location of the engine control module? The box I think it is has numbers 861546 and 41247489.

Thanks.

Have checked dery thing else, the engine will run with key in start. Release start circuit the engine quits. Open to any suggestions for I think this control is a bear to get out.