• Front view of the 2004 Sierra 1500 PCM, part number 12586242, showing its three main electrical connectors.
  • A pre-programmed 2004 GM PCM, part number 12586242, ready for installation in a compatible GM truck or SUV.
  • Programmed 2004 Sierra 1500 PCM, part number 12586242, ready for installation on a workbench.
  • A pre-programmed 2004 Avalanche 1500 PCM, part number 12586242, ready for installation.
  • A pre-programmed 2004 Avalanche 1500 PCM, part number 12586242, shown on a clean surface before installation.
  • Programmed 2004 Avalanche 1500 PCM, part number 12586242, ready for installation in a GM truck.
  • A programmed 2004 Avalanche 1500 PCM, part number 12586242, ready for installation.
  • Pre-programmed 2004 Avalanche 1500 PCM, part number 12586242, ready for installation.
  • Programmed 2004 Avalanche 1500 PCM, part number 12586242, ready for installation.
  • Pre-programmed 2004 Avalanche 1500 PCM, part number 12586242, ready for installation.
  • Programmed 2004 Avalanche 1500 PCM with service number 12586242, ready for installation.
  • Programmed 2004 Silverado 3500 PCM, part number 12586242, ready for installation in a GM truck.
  • Front view of a programmed 2004 Silverado 3500 PCM, part number 12586242, showing the main electrical connector ports.
  • A programmed 2004 Silverado 3500 PCM, part number 12586242, ready for installation.
  • Pre-programmed 12586242 Powertrain Control Module for a 2004 Silverado 3500, showing the main electrical connectors.
  • VIN-Programmed 2004 Silverado 3500 PCM (Part No. 12586242) ready for installation.
  • Pre-programmed 2004 Silverado 3500 PCM, part number 12586242, ready for installation.
  • 2004 Silverado 3500 PCM 12586242 engine computer module, pre-programmed for installation.
  • A 2004 Silverado 3500 PCM with service number 12586242 shown against a white background, highlighting the main electrical connectors.
  • Programmed 2004 Silverado 3500 PCM, part number 12586242, ready for installation.

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