Thread: 2003 PCM and wiring harness in a 98-02 possible?

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  1. #1 2003 PCM and wiring harness in a 98-02 possible? 
    SE Level Member Mater's Avatar
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    is it possible to swap the 03 wiring harness into a 98-02 grand prix? i know you can just swap pcm and add an external range switch to the trans but i want to keep the internal range switch
    But why make it an SE?



    99 Grand Prix SE coupe:
    junk yard trans junk yard engine and junk yard turbo
    03 Silverado 2500HD ECSB: 6.0 4x4 01 Aurora:​ 4.0L vin number 2
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  2. #2 Re: 2003 PCM and wiring harness in a 98-02 possible? 
    GXP Level Member Turbocharged400sbc's Avatar
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    You don't have to swap the whole harness all you will end up doing is connecting the old external range switch wires to the modern Internal mode switch (they changed the terminology but its function/circuit logic is identical) plug and you are done.
    The 03 PCM drops in
    ~James~ Psychotic Gearhead
    projects: 84 Cressida waGN~ 90 LN3 3800, equal length headers, T70, 89 700r4, misc parts,
    1994 Oldsmobile 442 (462ci-4wd-2 engines) L67/4t80e^2,
    00 Turbo Regal 608 fwhp 575ftlbs at 5500rpm, 98 WhippledRiv, 97 GTP
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  3. #3 Re: 2003 PCM and wiring harness in a 98-02 possible? 
    SE Level Member Mater's Avatar
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    sweet thanks
    But why make it an SE?



    99 Grand Prix SE coupe:
    junk yard trans junk yard engine and junk yard turbo
    03 Silverado 2500HD ECSB: 6.0 4x4 01 Aurora:​ 4.0L vin number 2
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