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Home >> Cadillac >> 2003 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 640 (Engine Controls - 5.7L - Introduction) >> Repair Instructions >> Powertrain Control Module (PCM) Replacement >> Installation Procedure
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Installation Procedure

WARNING: This page is about a different car, the 2004 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the PCM to the vehicle.
  2. Install the PCM wiring harness.
    3. NOTE: Refer to Fastener Notice in Cautions and Notices.
    Fig 1: Tightening PCM Electrical Connector Screws
    GM1412209Courtesy of GENERAL MOTORS CORP.
  3. Tighten the PCM electrical connector screws (1).

    Tighten:  Tighten the PCM electrical connector bolts to 8 N.m (71 lb in).

  4. Install the PCM to the PCM housing.
    5. Fig 2: Installing Bolt To PCM Cover Housing
    GM1412206Courtesy of GENERAL MOTORS CORP.
  5. Install the PCM housing cover.
  6. Install the bolt (1) to the PCM cover housing.

    Tighten:  Tighten the PCM housing cover bolt to 10 N.m (89 lb in).

    7. Fig 3: View Of Front Air Deflector And Push Pin retainers
    GM699902Courtesy of GENERAL MOTORS CORP.
  7. Install the front air deflector. Refer to Air Deflector Replacement - Front in Body Front End.
  8. Lower the vehicle.
  9. Connect the battery negative cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
  10. Program the PCM. Refer to Service Programming System (SPS) in Programming.
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