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Home >> GMC >> 2005 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 4.8L, 5.3L & 6.0L (Introduction) >> Repair Instructions >> Powertrain Control Module (PCM) Replacement >> Installation Procedure

Installation Procedure

    Fig 1: View Of PCM
    GM814119Courtesy of GENERAL MOTORS CORP.
  1. Install the PCM.

    Ensure that the mounting tabs are engaged.

  2. Secure the spring latch to the PCM.
    3. Fig 2: View Of PCM Electrical Connectors & Bolts
    GM814117Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  3. Connect the PCM electrical connectors.
  4. Tighten the PCM electrical connector bolts (2).

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

    5. Fig 3: PCM Cover
    GM1480464Courtesy of GENERAL MOTORS CORP.
  5. If vehicle is equipped with RPO HP2, install the PCM cover.
    6. Fig 4: View Of PCM Cover & Mounting Bracket
    GM814118Courtesy of GENERAL MOTORS CORP.
  6. If vehicle is NOT equipped with RPO HP2, install the PCM cover.
    7. Fig 5: Harness Ground Clip At PCM Cover
    GM865883Courtesy of GENERAL MOTORS CORP.
  7. If equipped with RPO HP2, install the HCM. Refer to Hybrid Control Module (HCM) Replacement (5.3L Engine w/RPO HP2) in Engine Electrical.
  8. If equipped with RPO NYS, install the harness ground clip to the PCM cover.
  9. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure (Single Battery) or Battery Negative Cable Disconnect/Connect Procedure (Auxiliary Battery) in Engine Electrical.
  10. If a NEW PCM was installed, program the PCM. Refer to Control Module References in Computer/Integrating Systems.
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