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Home >> Cadillac >> 2004 >> DeVille Protection Series >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls (Introduction) - 4.6L >> Repair Instructions >> Powertrain Control Module (PCM) Replacement >> Installation Procedure
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Installation Procedure

IMPORTANT: Inspect the following areas before installing the PCM:
  • No debris in the air filter element/PCM housing assembly, or the MAF/IAT sensor inlet screen that may distort the air flow.
  • No signs of damage to the air filter element/PCM housing assembly, or the intake air duct. If a problem is found, replace as necessary.
    Fig 1: View Of PCM & MAF/IAT Sensor
    GM622423Courtesy of GENERAL MOTORS CORP.
  1. Install the PCM connectors and locks.
  2. Install the PCM.
  3. Install the intake air duct, MAF/IAT sensor, and the air filter element/PCM housing cover to the throttle body.
    IMPORTANT: Properly install the intake air duct to the throttle body. An improperly installed, distorted, or damaged air filter or intake air duct may cause a DTC to set.
  4. Align and engage the tabs on the air filter element/PCM housing cover with the slots in the air filter element/PCM housing.
    5. NOTE: Refer to Fastener Notice in Cautions and Notices.
  5. Tighten the air element/PCM housing cover screws.

    Tighten:  Tighten the air element/PCM housing cover screws to 4 N.m (35 lb in).

  6. Tighten the intake air duct clamp at the throttle body.

    Tighten:  Tighten the clamp to 3 N.m (27 lb in).

  7. Reconnect the MAF/IAT sensor connector.
  8. Connect the battery negative cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
  9. Program the PCM. Refer to Service Programming System (SPS) in Programming.
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