• Front view of the Programmed 12586242 PCM for 2004 GM trucks and SUVs, showing the main connectors.
  • Front view of a 12586242 PCM for 2004 GM Sierra, Silverado, and Tahoe, showing the main connectors.
  • VIN Programmed 2004 Sierra 3500 PCM 12586242 Engine Computer Module
  • 2004 GMC Sierra 3500 engine computer module, part number 12586242.
  • Programmed 2004 Sierra 2500 PCM 12586242 Engine Computer, front view showing connectors.
  • Front view of the 2004 Sierra 2500 PCM 12586242 engine computer, showing the main connectors.
  • Front view of the 2004 Sierra 2500 PCM with part number 12586242, ready for VIN programming and installation.
  • A close-up of the 2004 Sierra 2500 PCM 12586242, showing the connectors and service label.
  • Programmed 2004 GMC Sierra 2500 PCM with service number 12586242 visible.
  • 2004 Sierra 2500 PCM 12586242 Engine Computer Module, front view with connectors.
  • Front view of the 2004 GMC Sierra 2500 PCM with part number 12586242 visible on the label.
  • Programmed 2004 Sierra 2500 PCM 12586242, front view showing connectors.
  • A side view of the 12586242 PCM for 2004 GM trucks and SUVs, showing the connection pins.
  • Front view of the 2004 GM PCM 12586242, showing the connectors for a Sierra, Silverado, or Tahoe.
  • 2004 Sierra 2500 PCM 12586242 Engine Computer ECM ECU programmed to VIN.
  • Programmed 2004 Silverado 2500 PCM with service number 12586242, showing connectors.
  • Programmed 2004 Silverado 2500 PCM with service number 12586242 shown on a white background.
  • Front view of the 2004 Silverado 2500 PCM, service number 12586242, showing the main electrical connectors.
  • Front view of the 2004 Silverado 2500 PCM with service number 12586242, showing the main electrical connectors.
  • Front view of the 2004 Silverado 2500 PCM 12586242 with its three main electrical connectors visible.

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