Broadcast Code Summary Sheet - NCRS Discussion Boards

Broadcast Code Summary Sheet

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  • David H.
    Extremely Frequent Poster
    • June 30, 2001
    • 1485

    Broadcast Code Summary Sheet

    I understand that line workers used broadcast codes to select parts during assembly. However, as far as I can tell, broadcast codes are not identified on A.I.M. sheets. A.I.M. sheets do specify different part numbers for standard and optional parts. My tank sticker (build sheet) shows broadcast codes, and I presume that document is what the line workers referenced when assembling the car.

    Is (was) there a single GM document that identified all broadcast codes specific to part numbers? It seems like someone would have used a control document when setting up the assembly line.
    Judging Chairman Mid-Way USA (Kansas) Chapter
  • John H.
    Beyond Control Poster
    • December 1, 1997
    • 16513

    #2
    Re: Broadcast Code Summary Sheet

    Originally posted by David Houlihan (36425)
    I understand that line workers used broadcast codes to select parts during assembly. However, as far as I can tell, broadcast codes are not identified on A.I.M. sheets. A.I.M. sheets do specify different part numbers for standard and optional parts. My tank sticker (build sheet) shows broadcast codes, and I presume that document is what the line workers referenced when assembling the car.

    Is (was) there a single GM document that identified all broadcast codes specific to part numbers? It seems like someone would have used a control document when setting up the assembly line.
    David -

    No, there isn't - the part number application/assignments of broadcast codes varied by year, by carline, by model, and each plant had the option of modifying them to suit their local requirements.

    Comment

    • David H.
      Extremely Frequent Poster
      • June 30, 2001
      • 1485

      #3
      Re: Broadcast Code Summary Sheet

      Originally posted by John Hinckley (29964)
      ... No, there isn't ...
      John,

      Thanks, seemed like it would be a handy document to have.
      Judging Chairman Mid-Way USA (Kansas) Chapter

      Comment

      • Tom R.
        Extremely Frequent Poster
        • June 30, 1993
        • 4081

        #4
        Re: Broadcast Code Summary Sheet

        Originally posted by David Houlihan (36425)
        I understand that line workers used broadcast codes to select parts during assembly. However, as far as I can tell, broadcast codes are not identified on A.I.M. sheets. A.I.M. sheets do specify different part numbers for standard and optional parts. My tank sticker (build sheet) shows broadcast codes, and I presume that document is what the line workers referenced when assembling the car.
        To clarify, the buildsheet called out equipment for options or the Regular Production Option (RPO) codes and we see that by late C3 production years, the range of codes printed on the manifest were numerous when compared to early C3 code usage. Does not mean they were not being used...just means the manifest was depended upon to a greater degree to document optional equipment.

        Seven copies of the GMAD buildsheet (landscape style) were distributed to the seven lines such as body, trim, chassis, inspection, etc. Just the other day, I was doing some study on buildsheets and realized by the 1980s, it was used to call out the manifold vacuum port fitting for automatic versus four-speed transmission. By the late C3 years, we see a greater dependence on technology, data processing to build Corvettes documented with the manifest or buildsheet.

        We think of broadcast codes as two-three alpha letter codes but the factory also used the last three digits of the part number. For example, codes for base front stabilizer bar was 318 while the FE7 bar was 596. The manifold vacuum port described above was 680 versus 679. On low-mileage Corvettes (C3s) paper tags can be reconciled with the buildsheet broadcast codes where all these code nuances can be seen and experienced.
        Tom Russo

        78 SA NCRS 5 Star Bowtie
        78 Pace Car L82 M21
        00 MY/TR/Conv

        Comment

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