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Thread: ECM location

  1. #1
    prussell
    Guest

    Default ECM location

    Can anyone tell me where the ECM is located on an 81 vette and is it difficult to replace? I have been told that it could be either in the front(under the hood) or under the dash. Thanks!

  2. #2
    Member cheeseral's Avatar
    Join Date
    Aug 2002
    Location
    Garner, NC, USA
    Posts
    57
    Corvette(s)
    1981 Midnight Blue Coupe

    Default ECM Location

    It's located behind the drivers seat in the battery box, mounted to the front wall of the battery box. It's not to hard to replace.

  3. #3
    Member 81 Corvette's Avatar
    Join Date
    May 2003
    Location
    Toledo
    Posts
    660
    Corvette(s)
    1981 Pearl White

    Default

    i thought it was located under the arm rest behind teh emergency brake

  4. #4
    prussell
    Guest

    Default

    I looked last night. I believe that it is in fact located in the battery box. Thanks for the info!! Now, I need to find out how difficult it is to replace - is it a matter of just taking the old one out and installing the new one???

  5. #5
    Member
    Join Date
    Jul 2002
    Location
    Oro Valley, AZ USA
    Posts
    652
    Corvette(s)
    81 White/Cinnabar, 96 CE LT4 sil/blk

    Default

    Replacing the ECM is very easy....two connectors and four small bolts.

    BUT

    Replacement ECMs do not come with the PROM or memory chip in them. Use either have to reuse your old one (hope its still good), or get a replacement one. GM does not have them, only place I found was HyperChip which I got through Summit Racing. Took eight weeks to get it to!!

    Later,
    Lanny

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