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Home >> Hummer >> 2006 >> H3 Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 3.5L - Introduction (2 Of 2) >> Repair Instructions >> Powertrain Control Module (PCM) Replacement >> Installation Procedure
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Installation Procedure

  1. Install the PCM (1) into the PCM mounting bracket, allowing the tabs to fully engage.
  2. Fig 1: Removing/Installing PCM
    GM1560061Courtesy of GENERAL MOTORS CORP.
  3. Connect the body wiring harness PCM connector to the PCM.
  4. Fig 2: Locating PCM & Body Wiring Harness PCM Connector
    GM1560063Courtesy of GENERAL MOTORS CORP.
  5. Engage the CPA retainer.
  6. Connect the engine wiring harness PCM connectors to the PCM.
  7. Fig 3: Locating PCM & Engine Wiring Harness PCM Connectors
    GM1560062Courtesy of GENERAL MOTORS CORP.
  8. Engage the CPA retainer.
  9. If a NEW PCM was installed, the PCM must be programmed. Refer to Control Module References .