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Home >> GMC >> 2004 >> Jimmy 2D Utility, Part Time, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 4.3L (Introduction) >> Repair Instructions >> Powertrain Control Module (PCM) Replacement >> Removal Procedure
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Removal Procedure

    CAUTION: Refer to Battery Disconnect Caution in Cautions and Notices.
    NOTE: In order to prevent internal damage to the PCM, the ignition must be OFF when disconnecting or reconnecting the PCM connector.
  1. Disconnect the negative battery cable.
    2. Fig 1: View Of PCM Retention Bar & Retainer
    GM352488Courtesy of GENERAL MOTORS CORP.
  2. Move the PCM retention bar and retainer away from the PCM.
    3. Fig 2: View Of PCM
    GM352489Courtesy of GENERAL MOTORS CORP.
  3. Remove the PCM from the PCM mounting bracket.
    4. Fig 3: View Of PCM Electrical Connectors
    GM66513Courtesy of GENERAL MOTORS CORP.
  4. Disconnect the PCM electrical connectors.
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