ECM location

Tiny
BIGACE
  • MEMBER
  • 1995 CADILLAC DEVILLE
Where is the Engine Control Module located on a 1995 sedan deville w/ 4.9L engine?
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Thursday, April 17th, 2008 AT 8:29 PM

12 Replies

Tiny
BMRFIXIT
  • EXPERT
Right side under the clove box and to the right
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Thursday, April 17th, 2008 AT 9:00 PM
Tiny
BUZZSAW
  • MEMBER
Its in the engine compartment under the air filter, you can't miss it, remove the air filter housing
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Friday, April 18th, 2008 AT 1:02 PM
Tiny
BMRFIXIT
  • EXPERT
Its in the engine compartment under the air filter, you can't miss it, remove the air filter housing[/quote:b31e3859fc]

I HAD NO IDEA THEY CHANGE ITS LOCATION
MITCHELL ON DEMAND AND ALL DATA BOTH AGREE WITH ME ITS UNDER THE RIGHT SIDE OF THE DASH
MITCHELL HAD NO CLEAR PICTURE SO THIS IS FROM ALL-DATA
LET ME KNOW IF I NEED TO UPDATE MY BOOKS !


https://www.2carpros.com/forum/automotive_pictures/99387_cadi_95_1.jpg

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Friday, April 18th, 2008 AT 1:53 PM
Tiny
BUZZSAW
  • MEMBER
Its in the engine compartment under the air filter, you can't miss it, remove the air filter housing[/quote:feb23c1857]

I HAD NO IDEA THEY CHANGE ITS LOCATION
MITCHELL ON DEMAND AND ALL DATA BOTH AGREE WITH ME ITS UNDER THE RIGHT SIDE OF THE DASH
MITCHELL HAD NO CLEAR PICTURE SO THIS IS FROM ALL-DATA
LET ME KNOW IF I NEED TO UPDATE MY BOOKS !


https://www.2carpros.com/forum/automotive_pictures/99387_cadi_95_1.jpg

[/quote:feb23c1857]

sorry its under the air filter, its to big to fit there. Alldata is wrong
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Monday, April 21st, 2008 AT 1:20 AM
Tiny
JSK333
  • MEMBER
  • 1990 CADILLAC DEVILLE
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!
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Tuesday, January 26th, 2021 AT 7:29 PM (Merged)
Tiny
FACTORYJACK
  • EXPERT
The PCM is behind the glove box, up in the corner. Three different size connectors, I think just a 10mm nut on a stud and bracket will allow it to be removed.
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Tuesday, January 26th, 2021 AT 7:29 PM (Merged)
Tiny
WILLIAM030242
  • MEMBER
  • 1985 CADILLAC DEVILLE
  • V8
  • FWD
  • AUTOMATIC
  • 126,000 MILES
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.
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Tuesday, January 26th, 2021 AT 7:29 PM (Merged)
Tiny
WRENCHER1
  • EXPERT
You have a 4.1 engine, not a 401.
It's located behind RH Side Of I/P, Near Shroud
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Tuesday, January 26th, 2021 AT 7:29 PM (Merged)
Tiny
CADIEMAN
  • MEMBER
The ecm is under the r/side dash under the lower panel on the firewall. Why are you replacing it?
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Tuesday, January 26th, 2021 AT 7:29 PM (Merged)
Tiny
WILLIAM030242
  • MEMBER
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.
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Tuesday, January 26th, 2021 AT 7:29 PM (Merged)
Tiny
WRENCHER1
  • EXPERT
I'd say you are probably wrong on both counts. I doubt the controller has anything to do with that symptom and it isn't really that hard to change. I'd take a close look at the ignition switch.
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Tuesday, January 26th, 2021 AT 7:29 PM (Merged)
Tiny
CADIEMAN
  • MEMBER
Youll need to remove the ingition switch on the steering column. Operate the switch with a screwdriver. Start the car and testdrive. No ecm replacment
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Tuesday, January 26th, 2021 AT 7:29 PM (Merged)

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