GMC ECM

At FLAGSHIP ONE, INC., we are proud to offer our customers a wide range of GMC ECMs (Engine Control Modules) for sale. These crucial components play a vital role in monitoring and controlling all aspects of your vehicle's engine performance and emissions systems. Whether it's fuel injection timing, ignition timing, or variable valve timing, our GMC ECMs ensure your vehicle delivers optimal performance at all times. And should your ECM encounter any issues, our comprehensive repair services and software tuning ensure that you get back on the road quickly and efficiently. Trust FLAGSHIP ONE, INC. - your reliable source for engine control module repair, reprogramming, and updating services

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  1. 12586243 | 2004 GMC Jimmy 4.3L PCM Engine Computer ECM ECU Programmed Plug&Play | 12583659
    $175.00
    Rated 4.0/5 based on 2025 customer reviews
    Ari - by , Friday
    4.0/ 5stars 1star
    excellent seller to work with, excellent packing and thank you for the super fast delivery.Flagship One, Inc
    GMChttps://www.fs1inc.com/media/product/image/gm/gm_type_a/gm_pcm_ecm_type_a_1.jpg12586243
    $188.99
  2. 12586243 | 2004 GMC Safari 4.3L PCM Engine Computer ECM ECU Programmed Plug&Play | 12583659
    $175.00
    Rated 4.0/5 based on 2025 customer reviews
    Pedro - by , Friday
    4.0/ 5stars 1star
    plugged and played just as promised thanksFlagship One, Inc
    GMChttps://www.fs1inc.com/media/product/image/gm/gm_type_a/gm_pcm_ecm_type_a_1.jpg12586243
    $188.99
  3. 12586242 | 2004 GMC Sierra 1500 4.8L PCM Engine Computer ECM ECU Programmed Plug&Play | 12583660
    $165.00
    Rated 4.0/5 based on 2025 customer reviews
    Ari - by , Friday
    4.0/ 5stars 1star
    works great, so far so good completed drive cycles and no pending codes . A+ seller buy with confedence. I definitely will again.Flagship One, Inc
    GMChttps://www.fs1inc.com/media/product/image/gm/gm_type_a/gm_pcm_ecm_type_a_1.jpg12586242
    $177.99
  4. 12589463 | 2004 GMC Sierra 1500 4.8L PCM Engine Computer ECM ECU Programmed Plug&Play | 12589162
    $194.00
    Rated 4.0/5 based on 2025 customer reviews
    Pedro - by , Friday
    4.0/ 5stars 1star
    Fast shipping great product thank youFlagship One, Inc
    GMChttps://www.fs1inc.com/media/product/image/gm/gm_type_a/gm_pcm_ecm_type_a_1.jpg12589463
    $209.99
  5. 12582605 | 2004 GMC Sierra 1500 4.8L PCM Engine Computer ECM ECU Programmed Plug&Play | 12580786
    $194.00
    Rated 4.0/5 based on 2025 customer reviews
    Luis - by , Friday
    4.0/ 5stars 1star
    plugged and played just as promised thanksFlagship One, Inc
    GMChttps://www.fs1inc.com/media/product/image/gm/gm_type_a/gm_pcm_ecm_type_a_1.jpg12582605
    $209.99
  6. 12602802 | 2004 GMC Sierra 1500 4.8L PCM Engine Computer ECM ECU Programmed Plug&Play | 12589162
    $194.00
    Rated 4.0/5 based on 2025 customer reviews
    Ari - by , Friday
    4.0/ 5stars 1star
    works great, so far so good completed drive cycles and no pending codes . A+ seller buy with confedence. I definitely will again.Flagship One, Inc
    GMChttps://www.fs1inc.com/media/product/image/gm/gm_type_a/gm_pcm_ecm_type_a_1.jpg12602802
    $209.99
  7. 28042802 | 2004 GMC Sierra 1500 4.8L ECM Engine Computer PCM ECU Programmed Plug&Play | 12589162
    $194.00
    Rated 4.0/5 based on 2025 customer reviews
    Willams - by , Friday
    4.0/ 5stars 1star
    Great Service fast delivery Worked perfect. Plug&Play.Thanks.Flagship One, Inc
    GMChttps://www.fs1inc.com/media/product/image/gm/gm_type_a/gm_pcm_ecm_type_a_1.jpg28042802
    $209.99
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All GMC PCM (Powertrain Control Module) GMC ECM (Engine Control Module) & GMC ECU (Electronic Control Unit)from Flagship One,Inc. are precisely programmed and flashed to meet your vehicle's specific requirements.

Our GMC PCM, GMC ECM and GMC ECU units that are labeled plug & play will not require any additional programming.

Here is a list of all of the GMC PCM, GMC ECM and GMC Control Modules that we have in stock and are ready to ship: